Process for recovering tail gas in production of gamma-chloropropyltrichlorosilane

Abstract

The invention relates to the technical field of tail gas recovery process, specifically to a process for recovering tail gas in production of gamma-chloropropyltrichlorosilane. The process comprises the following steps: introducing tail gas generated in a production process system and entraining non-condensable gases like products and by-products into a buffer tank for collection, introducing collected tail gas into a diaphragm compressor under the protection of high-purity N2, and carrying out pressurizing to a certain pressure range; and discharging compressed gas in the compressor into a condenser for preliminary recovery. The process for recovering the tail gas in production of the gamma-chloropropyltrichlorosilane provided by the invention has the following advantages: substances incapable of being effectively recovered for the first time are subjected to a continuous addition reaction; chloroplatinic acid hydrate and zero-valent platinum are complexed as a catalyst for use according to a mixing ratio; homogeneous silicon and hydrogen are subjected to an addition reaction, so the compatibility and conversion rate of two reactants are improved; meanwhile, the activation energyin the reaction process is reduced; and waste gas components contained in secondary treatment can be completely converted.

Description

technical field [0001] The invention relates to the technical field of tail gas recovery technology, in particular to a tail gas recovery process for the production of γ-chloropropyltrichlorosilane. Background technique [0002] The goal of this patent is to propose a solution to the situation that in the process of industrial manufacturing and production of products, non-condensable gas will be produced after the product reacts, and the non-condensable gas cannot be effectively treated and recycled, thereby causing serious pollution to the atmospheric environment. . [0003] In the traditional treatment process in the original industry, after the non-condensable gas of the product is collected by the condenser, the non-condensable gas enters the water spray scrubber to form dilute hydrochloric acid, silicon dioxide, silicic acid, and metasilicate, among which Waste acid water has a significant impact on the environment, and the gas after washing is discharged into the atmo...

AI Technical Summary

Problems solved by technology

[0002] The goal of this patent is to propose a solution to the situation that in the process of industrial manufacturing and production of products, non-condensable gas will be produced after the product reacts, and the non-condensable gas cannot be effectively treated and recycled, thereby causing serious pollution to the atmospheric environment.

[0003] In the traditional treatment process in the original industry, after the non-condensable gas of the product is collected by the condenser, the non-condensable gas enters the water spray scrubber to form dilute hydrochloric acid, silicon dioxide, silicic acid, and metasilicate, among which Waste acid water, etc. have a significant impact on the environment, and the gas after washing is discharged into the atmosphere in an unorganized manner

In cloudy and rainy weather, a large amount of white mist of hydrogen chloride gas discharged from the air outlet will form acid rain when it encounters water vapor, and then fall back into the air. This solution is neither safe nor environmentally friendly. Hydrogen gas is generated under alkaline conditions. There are potential dangers of combustion and explosion, and there are major safety hazards. As the country puts forward the concept of green industry and the regulatory authorities have higher and higher emission requirements for production enterprises, the traditional treatment process can no longer meet the current and future environmental protection requirements.