Technical article

Silica gel vs silica alumina gel


In recent years, with the continuous development of science and technology, silica gel and silica alumina gel have become indispensable materials in people's life. Although they are both made of the element silicon, there are some notable differences between them. The following article will make a detailed introduction.
First of all, silica gel is a colorless, transparent or translucent colloidal substance whose main component is silicon dioxide. There are three types of common silica gel: white silica gel, orange silica gel (cobalt-free silica gel), blue silica gel (cobalt-containing silica gel). Silica gel has excellent high temperature resistance, anti-aging, waterproof, moisture-proof and other properties. Therefore, it is widely used in electronic products, food packaging, medical equipment, toys, insoles and other fields. For example, in electronic products, especially in mobile devices and automotive electronics, silicone sealing components can effectively protect circuit boards from moisture, dust and other external factors. In addition, silicone is widely used in food packaging and medical devices because it does not react with food or medicines, nor does it have any harmful effects on the human body. Silicone is also commonly used to make toys, insoles, etc., because of its softness and elasticity, it can provide the best comfort and support.
The silica alumina gel is a colloidal substance obtained by taking silicon and aluminum as the main raw materials and adding a certain amount of sodium hydroxide for reaction. It is mainly divided into 2 types: WS type silica alumina gel and silica alumina gel H type, and the aluminum content is also different. Compared with silica gel, silica alumina gel has better performance in some special fields. It has excellent adsorption, dehydration, stability and other characteristics. Therefore, it is widely used in chemical, environmental, pharmaceutical, food and other industries.
* In the pharmaceutical industry, silica alumina gel is used to make pills and oral liquids, and is used as a fixative in large pharmaceutical factories.
* In the field of environmental protection, silica alumina gel can remove pollutants such as heavy metal ions and organic substances in wastewater, thereby purifying water quality.
* Silica alumina gel can also be used as a catalyst and adsorbent in many chemical reactions because of its strong adsorption and dehydration properties.
* Silica alumina gel is also widely used in the field of petrochemical industry. For example, in oil exploration, silica alumina gel can be used as an important part of drilling fluid to reduce the loss of well wall integrity.
* In addition, silica alumina gel can also be used in oil field water treatment to remove suspended solids, color and odor in water.
* Silica alumina gel is also commonly used in biotechnology and medical fields. In biotechnology, silica alumina gel can be used for DNA extraction, PCR amplification, gene detection and sequencing, etc. Its high adsorption capacity and special surface chemical properties make it perform well in these applications. In the medical field, silica alumina gel is widely used to prepare organs such as artificial kidneys and artificial livers, and to treat renal insufficiency and other diseases.
Generally speaking, although silica gel and silica alumina gel have the same raw materials, their different proportions and preparation processes make them different in performance and use. Silica gel is mainly used in the fields of electronics, food packaging, medical equipment and toys, while silica alumina gel is widely used in chemical, environmental, pharmaceutical and food industries. Buyers need to choose according to their own needs when purchasing to achieve the best results.
OIM Chemical also have some other adsorbents available, such as molecular sieve, CMS, actiavated alumina, silica gel available. To know more, can just send us email via

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Tracy Chen
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