Hydrogen selenide is an important electronic specialty gas and my country’s production capacity continues to increase

Hydrogen selenide, with the chemical formula H2Se, appears as a colorless gas at room temperature and can be liquefied at low temperatures. It has a foul smell and is toxic. Hydrogen selenide is soluble in water, and the aqueous solution is acidic, soluble in carbon disulfide, and has strong reducing properties. When mixed with air, there is a danger of combustion and explosion when exposed to open flames or high heat. Hydrogen selenide is stable under normal temperatures and pressures, but has poor thermal stability and can decompose at temperatures around 160°C.

There are two main methods for preparing hydrogen selenide. One is to use selenium as raw material, heat and melt it in a reactor, and introduce hydrogen gas under certain pressure conditions to react to generate a gas mixture, which is purified through cooling, filtration, low-temperature distillation and other processes. , this method is the mainstream method for preparing hydrogen selenide in the industrial field; the second is to use metal selenide such as Al2Se3 as raw material and perform a hydrolysis reaction. This method is mainly used in the laboratory field.

According to the “In-depth Market Research and Investment Strategy Suggestions Report on Hydrogen Selenide Industry 2021-2025” released by the Industrial Research Center, selenium Hydrogen selenide is mainly used in semiconductors, integrated circuits, display panels, solar cells and other fields. Electronic-grade hydrogen selenide with high purity is required. Electronic-grade hydrogen selenide is an important electronic special gas and can be used as a doping gas, reducing gas, etc. Gas, forming a P-N structure film on the surface of a semiconductor; hydrogen selenide can also be used in the preparation of metal selenides and selenium-containing organic compounds; in addition, hydrogen selenide can also be used in aerospace, national defense and other fields.

In overseas markets, hydrogen selenide manufacturers mainly include American Air Products, Germany’s Linde Group, Germany’s Messer, France’s Air Liquide, Japan’s Taiyo Nippon Sanso, Japan’s Showa Denko, Japan’s Kanto Denchemical, etc. In the early days, my country’s hydrogen selenide production capacity was weak and its demand relied on imports. However, the global annual production of hydrogen selenide was small and the market was in short supply. Some countries where companies are located have implemented a hydrogen selenide embargo policy against my country. my country’s independent production of hydrogen selenide is in urgent need.

my country’s electronic information industry is developing rapidly, and the demand for hydrogen selenide, an important electronic specialty gas, is rising. Against this background, domestic companies continue to increase investment in research and development. Zhonghao Guangming Chemical Research and Design Institute Co., Ltd. uses dry synthesis technology to achieve mass production of high-purity hydrogen selenide, breaking the monopoly of the domestic high-purity hydrogen selenide market by foreign companies. In 2020, Zhonghao Guangming Chemical Research and Design Institute Co., Ltd. The production equipment installed in the company’s R&D industrial base contains 20 tons/year hydrogen selenide production capacity.

Industry analysts said that in addition to Guangming Institute, my country’s hydrogen selenide producers include Taihe Gas (Jingzhou) Co., Ltd., which has The production capacity of hydrogen selenide for medical use and hydrogen selenide for optoelectronics is 3 tons/year; after Jiangxi Huate Electronic Chemicals Co., Ltd.’s “Gas Center Construction and Warehousing Operation Project” reaches full production, 40 tons/year of selenium will be added Hydrogen production capacity. From this point of view, my country’s hydrogen selenide production capacity is continuously increasing.