The development trend of the tetraethyl orthosilicate (TEOS) industry is good. my country’s electronic grade TEOS production capacity needs to be improved.

Ethyl orthosilicate, also known as ethyl silicate, tetraoxysilane, etc., referred to as TEOS, is an organic compound with the chemical formula Si (OC2H5) 4. It appears as a colorless or light brown liquid and has a pungent odor. , insoluble in water, soluble in ethanol, slightly soluble in benzene.

There are two main methods for producing ethyl orthosilicate, namely the silicon tetrachloride method, which uses silicon tetrachloride and absolute ethanol as raw materials to generate ethyl orthosilicate through a chemical reaction; the silicon powder method, It refers to the method of using silicon powder and ethanol as raw materials and catalyzing it with alkali metal alkoxide and alkali metal carboxylate catalysts to generate ethyl orthosilicate. Silicon tetrachloride is a key raw material for the production of ethyl orthosilicate. Its domestic production capacity has reached 265,000 tons in 2022. The sufficient supply of upstream raw materials has laid a good foundation for the development of the domestic ethyl orthosilicate industry.

Ethyl orthosilicate has a wide range of applications and can be widely used in construction, electronics, chemical industry and other fields. In the construction field, ethyl orthosilicate can be used as a stone reinforcing agent in the production of stone monuments and other buildings; in the chemical industry, ethyl orthosilicate can be used as a common silicon source for the preparation of SiO2 aerogels, which is used in electrical insulation materials. , optical glass treatment agent production and organic synthesis scenarios of heat-resistant coatings, silicone solutions, and adhesives; in the electronic field, ethyl orthosilicate can be used in the chemical gas deposition process to prepare silicon dioxide deposition films, playing a barrier role Contaminants and impurities enter semiconductor components.

According to different uses, ethyl orthosilicate can be divided into two categories: industrial grade ethyl orthosilicate and electronic grade ethyl orthosilicate. After recent years of development, my country’s industrial-grade ethyl orthosilicate has basically achieved localization, with a large number of production companies, including Inner Mongolia Hengxing Chemical, Tangshan Coupled Silicon Industry, Guangzhou Shuangtao Fine Chemicals, Qingdao Hengda Zhongcheng Technology, Jiangsu Jianping Chemical, Shanxi Boliang Silicon Industry, Zhangjiagang Xinya Chemical, Jiangxi Chenguang New Materials, Hubei Jianghan New Materials, Weifang Yuanfang Silicone Technology, etc. According to the“Research on Market Monitoring and Future Development Prospects of China’s Tetraethylorthosilicate (TEOS) Industry from 2023 to 2027″ released by the Industrial Research Center Report” shows that the domestic production capacity of orthoethyl silicate has reached 48,000 tons in 2022.

Due to technical limitations, the number of domestic electronic-grade ethyl orthosilicate manufacturers is still relatively small. The purity of electronic-grade ethyl orthosilicate needs to reach 8N and 9N levels, which is difficult to produce. Currently, only a few domestic companies such as Suzhou Jinhong Gas and Guizhou Weiton Crystal Phosphorus have production capabilities. In the future, local companies will need to continue to increase product research and development efforts to promote the continuous improvement of electronic-grade ethyl orthosilicate production capabilities.

Industry analysts said that nowadays, the development of the domestic orthoethyl silicate industry is affected by the sufficient supply of raw materials, The two major factors are favorable for the sustainable development of the downstream application market, and the industry development trend is good. At present, domestic ethyl orthosilicate companies have basically achieved large-scale mass production of industrial grade ethyl orthosilicate. However, only a few companies have the production capacity of electronic grade ethyl orthosilicate. In the future, the demand for ethyl orthosilicate in the electronic field will continue. Against the background of growth, local companies need to continue to increase product innovation.