Silica Gel Introduction and Overview of the Production Method

{"news_id":8410,"is_preview":0,"news_info":{"id":8410,"company_id":176,"user_id":411,"author":"","website_id":781,"pub_date":"2023-12-12 15:30:44","urla":"silica-gel-introduction-and-overview-of-the-production-method","description":"The organic silica gel which we talking about in daily includes silicone keyboards, silicone handles, silicone tubes, silicone sleeves, silicone phone cases, etc.","image_url":"https:\/\/oss.matchpages.cn\/matchpages\/common\/2023\/1212\/4137\/657808e6a444f\/ACC%C2%AE-Silica-Gel--3---1---2-.webp","image_alt":"Silica Gel","title":"Silica Gel Introduction and Overview of the Production Method","content":"<h1><span style=\"font-size: 18pt; color: #02703d;\"><strong>Silica&nbsp;Gel&nbsp;Introduction&nbsp;and&nbsp;Overview&nbsp;of&nbsp;the&nbsp;Production&nbsp;Method<\/strong><\/span><\/h1>\n<p style=\"line-height: 1.6;\">&nbsp; &nbsp; <span style=\"color: #181818;\">&nbsp;According to the properties and components, silica gel can be divided into organic silica gel and inorganics silica gel. The organic silica gel which we talking about in daily includes silicone keyboards, silicone handles, silicone tubes, silicone sleeves, silicone phone cases, etc. In this paper, we focus on inorganic silica gel.<\/span><\/p>\n<h2><span style=\"font-size: 14pt; color: #169179;\"><strong>1.Product&nbsp;Description<\/strong><\/span><\/h2>\n<p style=\"line-height: 1.75;\">&nbsp; &nbsp; <span style=\"color: #181818;\">Inorganic silica gel is a kind of highly active adsorption material, the main component is silicon dioxide. It is usually prepared by the reaction of sulfuric acid and sodium silicate, and by a series of &nbsp;&nbsp;treatment processes such as acid bubble and aging. <span style=\"color: #2dc26b;\"><a style=\"color: #2dc26b;\" href=\"https:\/\/www.allcarbon.com.cn\/silica-gel\" data-page_id=\"0\" data-page_name=\"\" data-page_type=\"\"><span style=\"text-decoration: underline;\"><strong>Silica gel<\/strong><\/span><\/a><\/span> is an amorphous substance, its chemical formula is mSiO<sub>2<\/sub>.nH<sub>2<\/sub>O, insoluble in water and any solvent, tasteless, non-toxic and chemical stability. <\/span><\/p>\n<p style=\"line-height: 1.75;\"><span style=\"color: #181818;\">&nbsp; &nbsp; &nbsp;In addition to hydrofluoric acid, strong alkali, it does not react with any substance. Various types of silica gel form different micro pore structures due to their different manufacturing &nbsp;methods. The physical structure and chemical composition of silica gel determines that it has many &nbsp;characteristics that are difficult to be replaced by other similar materials. Such as high adsorption performance, good thermal stability, stable chemical properties, and high mechanical strength.<\/span><\/p>\n<h2 style=\"line-height: 1.75;\"><span style=\"color: #169179; font-size: 14pt;\"><strong>2.Silica&nbsp;Gel&nbsp;Production&nbsp;Method<\/strong><\/span><\/h2>\n<p style=\"line-height: 1.75;\"><span style=\"color: #181818;\">&nbsp; &nbsp; &nbsp;The main raw materials of silica gel including sodium silicate (also known as water glass) and Sulfuric acid.<\/span><span style=\"color: #181818;\">The chemical reaction formula is Na<sub>2<\/sub>SiO<sub>3<\/sub>+H<sub>2<\/sub>SO<sub>4<\/sub>== Na<sub>2<\/sub>SO<sub>4<\/sub>+SiO<sub>2<\/sub>+H2O.<\/span><\/p>\n<p style=\"line-height: 1.75;\"><span style=\"color: #181818;\"><img style=\"float: left;\" src=\"https:\/\/oss.matchpages.cn\/matchpages\/common\/2023\/1212\/3898\/65780980d3d30\/%E5%BE%AE%E4%BF%A1%E5%9B%BE%E7%89%87_20231212151748.png\" alt=\"\u5fae\u4fe1\u56fe\u7247_20231212151748.png \" data-resolution=\"384*391\" \/><\/span><\/p>\n<p style=\"padding-left: 40px; line-height: 1.75;\"><span style=\"color: #181818;\"><strong><span style=\"color: #169179;\">a.<\/span><\/strong> The solid sodium silicate is melted at high temperature and filtered to prepare a liquid with a certain solubility (or pH value). At the same time, sulfuric acid is prepared to a certain concentration (or pH) of liquid, sulfuric acid concentration is 20%.<\/span><\/p>\n<p style=\"padding-left: 40px; line-height: 1.75;\"><span style=\"color: #181818;\"><strong><span style=\"color: #169179;\">b.<\/span><\/strong> Gelgranulationis one of the key steps in the production of silica gel, which means that a certain concentration of dilute bubble flower lye and dilute sulfuric acid are fully reacted to form a dissolved gel solution under certain conditions, and gel particles are formed after reaching a certain concentration. The shape and size of the gel particles are completely determined by the needs of the user and the process production capacity.<\/span><\/p>\n<p style=\"padding-left: 40px; line-height: 1.75;\"><span style=\"color: #181818;\"><strong><span style=\"color: #169179;\">c.<\/span><\/strong> Thegelneeds to be aged under a certain time, a certain temperature and PH value to make the gel skeleton strong. During the aging process, the glue condensates between the particles to form Si - O - Si bonds, strengthening the skeleton strength, and the particles are close to each other, narrowing the space in the grid structure and squeezing out the water contained in it.<\/span><\/p>\n<p style=\"padding-left: 40px; line-height: 1.75;\"><span style=\"color: #181818;\"><span style=\"color: #169179;\"><strong>d.<\/strong><\/span> Rubberwashingis an indispensable process in the production of silica gel, in order to wash off the Na<sub>2<\/sub>SO<sub>4<\/sub> formed by the granular gel, control the cationic ions within the range of process requirements, and it is also a process to adjust the internal structure.<\/span><\/p>\n<p style=\"padding-left: 40px; line-height: 1.75;\"><span style=\"color: #181818;\">The acid bubble process is the main process of exchange adsorption,and the acid bubble concentration, washing medium and washing temperature are the main parameters of the whole process,which affect the exchange speed and quantity.<\/span><\/p>\n<p style=\"padding-left: 40px; line-height: 1.75;\"><span style=\"color: #181818;\"><strong><span style=\"color: #169179;\">e.<\/span><\/strong> Puttheprepared hydro gel into the drying room, and dry the water content of the hydro gel itself to the required range under a certain temperature and a certain time. Drying is under the action of the liquid surface tension, the water evaporation volume of the colloidal particles shrinks, so that the &nbsp;primary particles gather again and \"grow up\" to achieve the purpose of deep aging. In order to inhibit the degree of aging, micro porous glue is often achieved by controlling the acid content of the rubber ball when it is dried. In the practice of reproduction, the coarse and fine porous glue is mostly dried under the general high temperature conditions. The higher drying temperature, the higher rate of primary particle aggregation will get the larger pore size.<\/span><\/p>\n<p style=\"padding-left: 40px; line-height: 1.75;\"><span style=\"color: #181818;\"><strong><span style=\"color: #169179;\">f.<\/span> <\/strong>The dried silica gel is screened by a screen with different pore sizes according to a certain particle size, and the broken silica gel is screened out at the same time.<\/span><\/p>\n<p style=\"padding-left: 40px; line-height: 1.75;\"><span style=\"color: #181818;\"><span style=\"color: #169179;\"><strong>g.<\/strong><\/span> Pick out the silica gel with heterochromatic balls and impurities. Pack and store as required.<\/span><\/p>\n<h2 style=\"line-height: 1.75;\"><span style=\"color: #169179; font-size: 14pt;\"><strong>3.Silica&nbsp;Gel&nbsp;Classification<\/strong><\/span><\/h2>\n<p style=\"line-height: 1.75;\"><span style=\"color: #181818;\">&nbsp; &nbsp; &nbsp;Based on the pore size of silica gel, it is divided into:<a href=\"https:\/\/www.allcarbon.com.cn\/a-type-fine-pored-silica-gel\" data-page_id=\"0\" data-page_name=\"\" data-page_type=\"\"><span style=\"text-decoration: underline; color: #2dc26b;\"><strong> A Type Silica Gel<\/strong> <\/span><\/a>(Fine-pored Silica Gel), <a href=\"https:\/\/www.allcarbon.com.cn\/b-type-silica-gel\" data-page_id=\"0\" data-page_name=\"\" data-page_type=\"\"><span style=\"text-decoration: underline; color: #2dc26b;\"><strong>B Type Silica gel<\/strong><\/span><\/a>, and <a href=\"https:\/\/www.allcarbon.com.cn\/c-type-silica-gel\" data-page_id=\"0\" data-page_name=\"\" data-page_type=\"\"><span style=\"text-decoration: underline; color: #2dc26b;\"><strong>C Type Silica Gel<\/strong><\/span><\/a> (Macro-pored Silica gel).<\/span><\/p>\n<p style=\"line-height: 1.75;\"><span style=\"color: #181818;\"><a href=\"https:\/\/www.allcarbon.com.cn\/a-type-fine-pored-silica-gel\" data-page_id=\"0\" data-page_name=\"\" data-page_type=\"\"><img src=\"https:\/\/oss.matchpages.cn\/matchpages\/common\/2023\/0927\/6913\/651396faf1655\/A-Type-Fine-pored-Silica-Gel.webp\" alt=\"A Type Fine-pored Silica Gel \" width=\"200\" height=\"200\" data-resolution=\"600*600\" \/><\/a><a href=\"https:\/\/www.allcarbon.com.cn\/b-type-silica-gel\" data-page_id=\"0\" data-page_name=\"\" data-page_type=\"\"><img src=\"https:\/\/oss.matchpages.cn\/matchpages\/common\/2023\/0927\/8121\/6513a466b3ca0\/B-Type-Silica-Gel.webp\" alt=\"B Type Silica Gel \" width=\"200\" height=\"200\" data-resolution=\"600*600\" \/><\/a><a href=\"https:\/\/www.allcarbon.com.cn\/c-type-silica-gel\" data-page_id=\"0\" data-page_name=\"\" data-page_type=\"\"><img src=\"https:\/\/oss.matchpages.cn\/matchpages\/common\/2023\/0927\/2659\/6513cd8e54fd2\/C-Type-Silica-Gel.webp\" alt=\"C Type Silica Gel \" width=\"200\" height=\"200\" data-resolution=\"600*600\" \/><\/a><\/span><\/p>\n<p style=\"line-height: 1.75;\"><span style=\"color: #181818;\">From&nbsp;the&nbsp;following&nbsp;main&nbsp;specifications, silica&nbsp;gel&nbsp;can&nbsp;be&nbsp;judged&nbsp;belong&nbsp;to&nbsp;which&nbsp;type.<\/span><\/p>\n<table style=\"border-collapse: collapse; border-color: #181818; border-style: double;\">\n<tbody>\n<tr>\n<td width=\"171\">\n<p><span style=\"color: #181818;\">Specifications<\/span><\/p>\n<\/td>\n<td width=\"132\">\n<p><span style=\"color: #181818;\">A&nbsp;Type&nbsp;Silica&nbsp;Gel<\/span><\/p>\n<\/td>\n<td width=\"132\">\n<p><span style=\"color: #181818;\">B&nbsp;Type&nbsp;Silica&nbsp;Gel<\/span><\/p>\n<\/td>\n<td width=\"142\">\n<p><span style=\"color: #181818;\">C&nbsp;Type&nbsp;Silica&nbsp;Gel<\/span><\/p>\n<\/td>\n<\/tr>\n<tr>\n<td width=\"171\">\n<p><span style=\"color: #181818;\">Pore&nbsp;Size<\/span><\/p>\n<\/td>\n<td width=\"132\">\n<p><span style=\"color: #181818;\">2.0-3.0nm<\/span><\/p>\n<\/td>\n<td width=\"132\">\n<p><span style=\"color: #181818;\">5.0-8.0nm<\/span><\/p>\n<\/td>\n<td width=\"142\">\n<p><span style=\"color: #181818;\">9.0-10.0nm<\/span><\/p>\n<\/td>\n<\/tr>\n<tr>\n<td width=\"171\">\n<p><span style=\"color: #181818;\">Pore&nbsp;Volume<\/span><\/p>\n<\/td>\n<td width=\"132\">\n<p><span style=\"color: #181818;\">0.35-0.45mL\/g<\/span><\/p>\n<\/td>\n<td width=\"132\">\n<p><span style=\"color: #181818;\">0.5-0.7mL\/g<\/span><\/p>\n<\/td>\n<td width=\"142\">\n<p><span style=\"color: #181818;\">0.85-1.0mL\/g<\/span><\/p>\n<\/td>\n<\/tr>\n<tr>\n<td width=\"171\">\n<p><span style=\"color: #181818;\">Specific&nbsp;surface&nbsp;area<\/span><\/p>\n<\/td>\n<td width=\"132\">\n<p><span style=\"color: #181818;\">&ge;600m<sup>2<\/sup>\/g<\/span><\/p>\n<\/td>\n<td width=\"132\">\n<p><span style=\"color: #181818;\">450-600m2\/g<\/span><\/p>\n<\/td>\n<td width=\"142\">\n<p><span style=\"color: #181818;\">320-400m<sup>2<\/sup>\/g<\/span><\/p>\n<\/td>\n<\/tr>\n<tr>\n<td width=\"171\">\n<p><span style=\"color: #181818;\">Bulk&nbsp;Density<\/span><\/p>\n<\/td>\n<td width=\"132\">\n<p><span style=\"color: #181818;\">&ge;670g\/L<\/span><\/p>\n<\/td>\n<td width=\"132\">\n<p><span style=\"color: #181818;\">500-600g\/L<\/span><\/p>\n<\/td>\n<td width=\"142\">\n<p><span style=\"color: #181818;\">400-500g\/L<\/span><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p style=\"line-height: 1.75;\">&nbsp;<\/p>\n<p style=\"line-height: 1.75;\"><strong><span style=\"color: #181818;\">Adsorption&nbsp;Isotherm&nbsp;for&nbsp;Silica&nbsp;gel&nbsp;in&nbsp;Different&nbsp;Relative&nbsp;Humidity.<\/span><\/strong><\/p>\n<p style=\"line-height: 1.75;\"><span style=\"color: #181818;\"><img style=\"float: left;\" src=\"https:\/\/oss.matchpages.cn\/matchpages\/common\/2023\/1212\/2298\/65780005187f7\/%E5%9B%BE%E7%89%871.png\" alt=\"\u56fe\u72471.png \" data-resolution=\"242*264\" \/><\/span><\/p>\n<p style=\"line-height: 1.75;\"><span style=\"color: #181818;\">&nbsp; &nbsp; &nbsp; Due to the different pore structures of different type of Silica gel, their adsorption properties have their own characteristics. <span style=\"text-decoration: underline;\"><strong>Macro-pored silica gel has a higher adsorption capacity in the environment of high relative humidity, and the adsorption capacity of Fine-pored silica gel is higher than that of&nbsp; macro-pored silica gel (such as silica gel desiccant) in the case of low relative humidity,<\/strong><\/span> and the adsorption capacity of B-type silica gel is also between macro-pored and fine-pored due to the pore structure. Therefore, different type silica gel should be selected according to different applications.<\/span><\/p>\n<h2 style=\"line-height: 1.75;\">&nbsp;<\/h2>\n<h2 style=\"line-height: 1.75;\"><span style=\"color: #169179;\"><strong><span style=\"font-size: 14pt;\">4.The&nbsp;main&nbsp;application&nbsp;areas&nbsp;of&nbsp;Silica&nbsp;Gel<\/span><\/strong><\/span><\/h2>\n<ul style=\"list-style-type: square;\">\n<li style=\"line-height: 1.75;\"><span style=\"color: #181818;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Petrochemical&nbsp;field.<\/span><\/li>\n<li style=\"line-height: 1.75;\"><span style=\"color: #181818;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Food, medicine&nbsp;and&nbsp;biochemistry.<\/span><\/li>\n<li style=\"line-height: 1.75;\"><span style=\"color: #181818;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Beer&nbsp;stabilizer&nbsp;filed.<\/span><\/li>\n<li style=\"line-height: 1.75;\"><span style=\"color: #181818;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Coating&nbsp;industry&nbsp;field.<\/span><\/li>\n<li style=\"line-height: 1.75;\"><span style=\"color: #181818;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Pharmacochemistry.<\/span><\/li>\n<li style=\"line-height: 1.75;\"><span style=\"color: #181818;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Agricultural&nbsp;application&nbsp;field.<\/span><\/li>\n<li style=\"line-height: 1.75;\"><span style=\"color: #181818;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Tertiary&nbsp;industry&nbsp;application&nbsp;field, mainly&nbsp;used&nbsp;for&nbsp;adsorption&nbsp;drying.<\/span><\/li>\n<li style=\"line-height: 1.75;\"><span style=\"color: #181818;\">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Information&nbsp;industry&nbsp;application&nbsp;field.<\/span><\/li>\n<\/ul>\n<p style=\"line-height: 1.75;\"><a href=\"https:\/\/www.allcarbon.com.cn\/silica-gel-for-beer\" data-page_id=\"0\" data-page_name=\"\" data-page_type=\"\"><img src=\"https:\/\/oss.matchpages.cn\/matchpages\/common\/2023\/0927\/4719\/6513cd8e50237\/beer.webp\" alt=\"Silica Gel for Beer \" width=\"275\" height=\"200\" data-resolution=\"1036*584\" \/><\/a><img src=\"https:\/\/oss.matchpages.cn\/matchpages\/common\/2023\/0927\/1346\/6513cd8e8f2c4\/Pharmaceutical-Purification-2.webp\" alt=\"Pharmaceutical Purification \" width=\"275\" height=\"200\" data-resolution=\"1080*720\" \/><span style=\"color: #181818;\"><a href=\"https:\/\/www.allcarbon.com.cn\/water-resistant-silica-alumina-gel\" data-page_id=\"0\" data-page_name=\"\" data-page_type=\"\"><img src=\"https:\/\/oss.matchpages.cn\/matchpages\/common\/2023\/0927\/6665\/6513cd8e4ca95\/Application-of-water-resistant-silicone-aluminum-glue---petrochemical-industry.webp\" alt=\"Application of water-resistant silicone aluminum glue - petrochemical industry \" width=\"275\" height=\"200\" data-resolution=\"540*360\" \/><\/a><a href=\"https:\/\/www.allcarbon.com.cn\/silica-gel-for-variable-pressure-adsorption\" data-page_id=\"0\" data-page_name=\"\" data-page_type=\"\"><img src=\"https:\/\/oss.matchpages.cn\/matchpages\/common\/2023\/0927\/3185\/6513cd8e83650\/Liquid-Oxygen.webp\" alt=\" adsorption drying \" width=\"275\" height=\"200\" data-resolution=\"1206*673\" \/><\/a><\/span><\/p>\n<h2 style=\"line-height: 1.75;\"><span style=\"color: #169179; font-size: 14pt;\"><strong>5.International&nbsp;leading&nbsp;producer&nbsp;of&nbsp;Silica&nbsp;Gel<\/strong><\/span><\/h2>\n<p style=\"line-height: 1.75;\"><span style=\"color: #181818;\">&nbsp; &nbsp; &nbsp;There are more than 60 international renowned silica gel production enterprises, mainly including USA Grace Company (Germany Analytik &amp; Alltech), SCM, PQ, Dow, KCC, Honeywell International, Parker Chomerics, Bergquist, Multisorb, Merck, WACKER, BASF, Henkel, Ineos Crossfield, Sika, Solvi &nbsp;Belgium, Mizusawa Chemical Co., LTD., Fuji SiLysia Chemical Co., LTD., Fuji Polymer Co., LTD., Toyota Chemical Co., LTD., Tokai Chemical Industry Co., LTD., OHE Chemicals, Korea Yodong Chemical Co.,&nbsp;&nbsp;LTD., Korea Nova Silicate Co., LTD., etc.<\/span><\/p>\n<h2 style=\"line-height: 1.75;\"><span style=\"font-size: 14pt; color: #169179;\"><strong>6.The&nbsp;development&nbsp;trend&nbsp;of&nbsp;Silica&nbsp;Gel&nbsp;industry<\/strong><\/span><\/h2>\n<p style=\"line-height: 1.75;\"><span style=\"color: #181818;\">&nbsp; &nbsp; According to the development of silica gel technology and market demand, the development trend of silicone industry is predicted as follows.<\/span><\/p>\n<ul>\n<li style=\"line-height: 1.75;\"><span style=\"color: #181818;\">Silicagelas a catalyst, matting agent, thixotropic agent, rheological agent, used in petrochemical, coatings, paper and plastics industries will progress rapidly through surface modification, chromatography technology development will be more extensive and in-depth.<\/span><\/li>\n<li style=\"line-height: 1.75;\"><span style=\"color: #181818;\">Thegrowthrate of micro-powder silica gel and functional silica gel will be higher than that of basic silica gel.<\/span><\/li>\n<li style=\"line-height: 1.75;\"><span style=\"color: #181818;\">Theresearchand development level of silica gel will be further improved, and the application of silica gel in electronic information, life sciences and other fields will make great progress.<\/span><\/li>\n<li style=\"line-height: 1.75;\"><span style=\"color: #181818;\">Theproportionof basic silica gel of Chinese enterprises in the capacity scale will be reduced by &nbsp;more than 20%, replaced by high-tech and high value-added products such as micro-powder silica gel and functional silica gel, and initially have a technical core.<\/span><\/li>\n<li style=\"line-height: 1.75;\"><span style=\"color: #181818;\">Withtheincreasingly fierce technological progress and competition, the competitive landscape will change, and mergers and acquisitions will occur locally, but will not affect the overall process of silicone technology development.<\/span><\/li>\n<\/ul>","discuss":0,"seo_title":"Silica Gel Introduction and Overview of the Production Method","seo_keyword":"Silica\u00a0Gel\u00a0Production\u00a0Method,Silica\u00a0Gel\u00a0Classification, application\u00a0areas\u00a0of\u00a0Silica\u00a0Gel","seo_describe":"Discover inorganic silica gel and its production method. Learn about its properties, applications, and leading producers. Explore the future trends in the silica gel industry.","track_code":"","viewer":"","source_copy_id":0,"sort":61,"status":0,"data_time":"2023-12-18 11:51:27","create_time":"2023-12-12 11:43:41","update_time":"2025-04-02 09:56:43","type_items":[{"id":2205,"website_id":781,"name":"Silica Gel","urla":""}],"tag_items":[]}}

<h1><span style="font-size: 18pt; color: #02703d;"><strong>Silica Gel Introduction and Overview of the Production Method</strong></span></h1>
<p style="line-height: 1.6;">    <span style="color: #181818;"> According to the properties and components, silica gel can be divided into organic silica gel and inorganics silica gel. The organic silica gel which we talking about in daily includes silicone keyboards, silicone handles, silicone tubes, silicone sleeves, silicone phone cases, etc. In this paper, we focus on inorganic silica gel.</span></p>
<h2><span style="font-size: 14pt; color: #169179;"><strong>1.Product Description</strong></span></h2>
<p style="line-height: 1.75;">    <span style="color: #181818;">Inorganic silica gel is a kind of highly active adsorption material, the main component is silicon dioxide. It is usually prepared by the reaction of sulfuric acid and sodium silicate, and by a series of   treatment processes such as acid bubble and aging. <span style="color: #2dc26b;"><a style="color: #2dc26b;" href="https://www.allcarbon.com.cn/silica-gel" data-page_id="0" data-page_name="" data-page_type=""><span style="text-decoration: underline;"><strong>Silica gel</strong></span></a></span> is an amorphous substance, its chemical formula is mSiO<sub>2</sub>.nH<sub>2</sub>O, insoluble in water and any solvent, tasteless, non-toxic and chemical stability. </span></p>
<p style="line-height: 1.75;"><span style="color: #181818;">     In addition to hydrofluoric acid, strong alkali, it does not react with any substance. Various types of silica gel form different micro pore structures due to their different manufacturing  methods. The physical structure and chemical composition of silica gel determines that it has many  characteristics that are difficult to be replaced by other similar materials. Such as high adsorption performance, good thermal stability, stable chemical properties, and high mechanical strength.</span></p>
<h2 style="line-height: 1.75;"><span style="color: #169179; font-size: 14pt;"><strong>2.Silica Gel Production Method</strong></span></h2>
<p style="line-height: 1.75;"><span style="color: #181818;">     The main raw materials of silica gel including sodium silicate (also known as water glass) and Sulfuric acid.</span><span style="color: #181818;">The chemical reaction formula is Na<sub>2</sub>SiO<sub>3</sub>+H<sub>2</sub>SO<sub>4</sub>== Na<sub>2</sub>SO<sub>4</sub>+SiO<sub>2</sub>+H2O.</span></p>
<p style="line-height: 1.75;"><span style="color: #181818;"><img style="float: left;" src="https://oss.matchpages.cn/matchpages/common/2023/1212/3898/65780980d3d30/%E5%BE%AE%E4%BF%A1%E5%9B%BE%E7%89%87_20231212151748.png" alt="微信图片_20231212151748.png " data-resolution="384*391" /></span></p>
<p style="padding-left: 40px; line-height: 1.75;"><span style="color: #181818;"><strong><span style="color: #169179;">a.</span></strong> The solid sodium silicate is melted at high temperature and filtered to prepare a liquid with a certain solubility (or pH value). At the same time, sulfuric acid is prepared to a certain concentration (or pH) of liquid, sulfuric acid concentration is 20%.</span></p>
<p style="padding-left: 40px; line-height: 1.75;"><span style="color: #181818;"><strong><span style="color: #169179;">b.</span></strong> Gelgranulationis one of the key steps in the production of silica gel, which means that a certain concentration of dilute bubble flower lye and dilute sulfuric acid are fully reacted to form a dissolved gel solution under certain conditions, and gel particles are formed after reaching a certain concentration. The shape and size of the gel particles are completely determined by the needs of the user and the process production capacity.</span></p>
<p style="padding-left: 40px; line-height: 1.75;"><span style="color: #181818;"><strong><span style="color: #169179;">c.</span></strong> Thegelneeds to be aged under a certain time, a certain temperature and PH value to make the gel skeleton strong. During the aging process, the glue condensates between the particles to form Si - O - Si bonds, strengthening the skeleton strength, and the particles are close to each other, narrowing the space in the grid structure and squeezing out the water contained in it.</span></p>
<p style="padding-left: 40px; line-height: 1.75;"><span style="color: #181818;"><span style="color: #169179;"><strong>d.</strong></span> Rubberwashingis an indispensable process in the production of silica gel, in order to wash off the Na<sub>2</sub>SO<sub>4</sub> formed by the granular gel, control the cationic ions within the range of process requirements, and it is also a process to adjust the internal structure.</span></p>
<p style="padding-left: 40px; line-height: 1.75;"><span style="color: #181818;">The acid bubble process is the main process of exchange adsorption,and the acid bubble concentration, washing medium and washing temperature are the main parameters of the whole process,which affect the exchange speed and quantity.</span></p>
<p style="padding-left: 40px; line-height: 1.75;"><span style="color: #181818;"><strong><span style="color: #169179;">e.</span></strong> Puttheprepared hydro gel into the drying room, and dry the water content of the hydro gel itself to the required range under a certain temperature and a certain time. Drying is under the action of the liquid surface tension, the water evaporation volume of the colloidal particles shrinks, so that the  primary particles gather again and "grow up" to achieve the purpose of deep aging. In order to inhibit the degree of aging, micro porous glue is often achieved by controlling the acid content of the rubber ball when it is dried. In the practice of reproduction, the coarse and fine porous glue is mostly dried under the general high temperature conditions. The higher drying temperature, the higher rate of primary particle aggregation will get the larger pore size.</span></p>
<p style="padding-left: 40px; line-height: 1.75;"><span style="color: #181818;"><strong><span style="color: #169179;">f.</span> </strong>The dried silica gel is screened by a screen with different pore sizes according to a certain particle size, and the broken silica gel is screened out at the same time.</span></p>
<p style="padding-left: 40px; line-height: 1.75;"><span style="color: #181818;"><span style="color: #169179;"><strong>g.</strong></span> Pick out the silica gel with heterochromatic balls and impurities. Pack and store as required.</span></p>
<h2 style="line-height: 1.75;"><span style="color: #169179; font-size: 14pt;"><strong>3.Silica Gel Classification</strong></span></h2>
<p style="line-height: 1.75;"><span style="color: #181818;">     Based on the pore size of silica gel, it is divided into:<a href="https://www.allcarbon.com.cn/a-type-fine-pored-silica-gel" data-page_id="0" data-page_name="" data-page_type=""><span style="text-decoration: underline; color: #2dc26b;"><strong> A Type Silica Gel</strong> </span></a>(Fine-pored Silica Gel), <a href="https://www.allcarbon.com.cn/b-type-silica-gel" data-page_id="0" data-page_name="" data-page_type=""><span style="text-decoration: underline; color: #2dc26b;"><strong>B Type Silica gel</strong></span></a>, and <a href="https://www.allcarbon.com.cn/c-type-silica-gel" data-page_id="0" data-page_name="" data-page_type=""><span style="text-decoration: underline; color: #2dc26b;"><strong>C Type Silica Gel</strong></span></a> (Macro-pored Silica gel).</span></p>
<p style="line-height: 1.75;"><span style="color: #181818;"><a href="https://www.allcarbon.com.cn/a-type-fine-pored-silica-gel" data-page_id="0" data-page_name="" data-page_type=""><img src="https://oss.matchpages.cn/matchpages/common/2023/0927/6913/651396faf1655/A-Type-Fine-pored-Silica-Gel.webp" alt="A Type Fine-pored Silica Gel " width="200" height="200" data-resolution="600*600" /></a><a href="https://www.allcarbon.com.cn/b-type-silica-gel" data-page_id="0" data-page_name="" data-page_type=""><img src="https://oss.matchpages.cn/matchpages/common/2023/0927/8121/6513a466b3ca0/B-Type-Silica-Gel.webp" alt="B Type Silica Gel " width="200" height="200" data-resolution="600*600" /></a><a href="https://www.allcarbon.com.cn/c-type-silica-gel" data-page_id="0" data-page_name="" data-page_type=""><img src="https://oss.matchpages.cn/matchpages/common/2023/0927/2659/6513cd8e54fd2/C-Type-Silica-Gel.webp" alt="C Type Silica Gel " width="200" height="200" data-resolution="600*600" /></a></span></p>
<p style="line-height: 1.75;"><span style="color: #181818;">From the following main specifications, silica gel can be judged belong to which type.</span></p>
<table style="border-collapse: collapse; border-color: #181818; border-style: double;">
<tbody>
<tr>
<td width="171">
<p><span style="color: #181818;">Specifications</span></p>
</td>
<td width="132">
<p><span style="color: #181818;">A Type Silica Gel</span></p>
</td>
<td width="132">
<p><span style="color: #181818;">B Type Silica Gel</span></p>
</td>
<td width="142">
<p><span style="color: #181818;">C Type Silica Gel</span></p>
</td>
</tr>
<tr>
<td width="171">
<p><span style="color: #181818;">Pore Size</span></p>
</td>
<td width="132">
<p><span style="color: #181818;">2.0-3.0nm</span></p>
</td>
<td width="132">
<p><span style="color: #181818;">5.0-8.0nm</span></p>
</td>
<td width="142">
<p><span style="color: #181818;">9.0-10.0nm</span></p>
</td>
</tr>
<tr>
<td width="171">
<p><span style="color: #181818;">Pore Volume</span></p>
</td>
<td width="132">
<p><span style="color: #181818;">0.35-0.45mL/g</span></p>
</td>
<td width="132">
<p><span style="color: #181818;">0.5-0.7mL/g</span></p>
</td>
<td width="142">
<p><span style="color: #181818;">0.85-1.0mL/g</span></p>
</td>
</tr>
<tr>
<td width="171">
<p><span style="color: #181818;">Specific surface area</span></p>
</td>
<td width="132">
<p><span style="color: #181818;">≥600m<sup>2</sup>/g</span></p>
</td>
<td width="132">
<p><span style="color: #181818;">450-600m2/g</span></p>
</td>
<td width="142">
<p><span style="color: #181818;">320-400m<sup>2</sup>/g</span></p>
</td>
</tr>
<tr>
<td width="171">
<p><span style="color: #181818;">Bulk Density</span></p>
</td>
<td width="132">
<p><span style="color: #181818;">≥670g/L</span></p>
</td>
<td width="132">
<p><span style="color: #181818;">500-600g/L</span></p>
</td>
<td width="142">
<p><span style="color: #181818;">400-500g/L</span></p>
</td>
</tr>
</tbody>
</table>
<p style="line-height: 1.75;"> </p>
<p style="line-height: 1.75;"><strong><span style="color: #181818;">Adsorption Isotherm for Silica gel in Different Relative Humidity.</span></strong></p>
<p style="line-height: 1.75;"><span style="color: #181818;"><img style="float: left;" src="https://oss.matchpages.cn/matchpages/common/2023/1212/2298/65780005187f7/%E5%9B%BE%E7%89%871.png" alt="图片1.png " data-resolution="242*264" /></span></p>
<p style="line-height: 1.75;"><span style="color: #181818;">      Due to the different pore structures of different type of Silica gel, their adsorption properties have their own characteristics. <span style="text-decoration: underline;"><strong>Macro-pored silica gel has a higher adsorption capacity in the environment of high relative humidity, and the adsorption capacity of Fine-pored silica gel is higher than that of  macro-pored silica gel (such as silica gel desiccant) in the case of low relative humidity,</strong></span> and the adsorption capacity of B-type silica gel is also between macro-pored and fine-pored due to the pore structure. Therefore, different type silica gel should be selected according to different applications.</span></p>
<h2 style="line-height: 1.75;"> </h2>
<h2 style="line-height: 1.75;"><span style="color: #169179;"><strong><span style="font-size: 14pt;">4.The main application areas of Silica Gel</span></strong></span></h2>
<ul style="list-style-type: square;">
<li style="line-height: 1.75;"><span style="color: #181818;">     Petrochemical field.</span></li>
<li style="line-height: 1.75;"><span style="color: #181818;">     Food, medicine and biochemistry.</span></li>
<li style="line-height: 1.75;"><span style="color: #181818;">     Beer stabilizer filed.</span></li>
<li style="line-height: 1.75;"><span style="color: #181818;">     Coating industry field.</span></li>
<li style="line-height: 1.75;"><span style="color: #181818;">     Pharmacochemistry.</span></li>
<li style="line-height: 1.75;"><span style="color: #181818;">     Agricultural application field.</span></li>
<li style="line-height: 1.75;"><span style="color: #181818;">     Tertiary industry application field, mainly used for adsorption drying.</span></li>
<li style="line-height: 1.75;"><span style="color: #181818;">     Information industry application field.</span></li>
</ul>
<p style="line-height: 1.75;"><a href="https://www.allcarbon.com.cn/silica-gel-for-beer" data-page_id="0" data-page_name="" data-page_type=""><img src="https://oss.matchpages.cn/matchpages/common/2023/0927/4719/6513cd8e50237/beer.webp" alt="Silica Gel for Beer " width="275" height="200" data-resolution="1036*584" /></a><img src="https://oss.matchpages.cn/matchpages/common/2023/0927/1346/6513cd8e8f2c4/Pharmaceutical-Purification-2.webp" alt="Pharmaceutical Purification " width="275" height="200" data-resolution="1080*720" /><span style="color: #181818;"><a href="https://www.allcarbon.com.cn/water-resistant-silica-alumina-gel" data-page_id="0" data-page_name="" data-page_type=""><img src="https://oss.matchpages.cn/matchpages/common/2023/0927/6665/6513cd8e4ca95/Application-of-water-resistant-silicone-aluminum-glue---petrochemical-industry.webp" alt="Application of water-resistant silicone aluminum glue - petrochemical industry " width="275" height="200" data-resolution="540*360" /></a><a href="https://www.allcarbon.com.cn/silica-gel-for-variable-pressure-adsorption" data-page_id="0" data-page_name="" data-page_type=""><img src="https://oss.matchpages.cn/matchpages/common/2023/0927/3185/6513cd8e83650/Liquid-Oxygen.webp" alt=" adsorption drying " width="275" height="200" data-resolution="1206*673" /></a></span></p>
<h2 style="line-height: 1.75;"><span style="color: #169179; font-size: 14pt;"><strong>5.International leading producer of Silica Gel</strong></span></h2>
<p style="line-height: 1.75;"><span style="color: #181818;">     There are more than 60 international renowned silica gel production enterprises, mainly including USA Grace Company (Germany Analytik & Alltech), SCM, PQ, Dow, KCC, Honeywell International, Parker Chomerics, Bergquist, Multisorb, Merck, WACKER, BASF, Henkel, Ineos Crossfield, Sika, Solvi  Belgium, Mizusawa Chemical Co., LTD., Fuji SiLysia Chemical Co., LTD., Fuji Polymer Co., LTD., Toyota Chemical Co., LTD., Tokai Chemical Industry Co., LTD., OHE Chemicals, Korea Yodong Chemical Co.,  LTD., Korea Nova Silicate Co., LTD., etc.</span></p>
<h2 style="line-height: 1.75;"><span style="font-size: 14pt; color: #169179;"><strong>6.The development trend of Silica Gel industry</strong></span></h2>
<p style="line-height: 1.75;"><span style="color: #181818;">    According to the development of silica gel technology and market demand, the development trend of silicone industry is predicted as follows.</span></p>
<ul>
<li style="line-height: 1.75;"><span style="color: #181818;">Silicagelas a catalyst, matting agent, thixotropic agent, rheological agent, used in petrochemical, coatings, paper and plastics industries will progress rapidly through surface modification, chromatography technology development will be more extensive and in-depth.</span></li>
<li style="line-height: 1.75;"><span style="color: #181818;">Thegrowthrate of micro-powder silica gel and functional silica gel will be higher than that of basic silica gel.</span></li>
<li style="line-height: 1.75;"><span style="color: #181818;">Theresearchand development level of silica gel will be further improved, and the application of silica gel in electronic information, life sciences and other fields will make great progress.</span></li>
<li style="line-height: 1.75;"><span style="color: #181818;">Theproportionof basic silica gel of Chinese enterprises in the capacity scale will be reduced by  more than 20%, replaced by high-tech and high value-added products such as micro-powder silica gel and functional silica gel, and initially have a technical core.</span></li>
<li style="line-height: 1.75;"><span style="color: #181818;">Withtheincreasingly fierce technological progress and competition, the competitive landscape will change, and mergers and acquisitions will occur locally, but will not affect the overall process of silicone technology development.</span></li>
</ul>