A method for absorbing and utilizing polymethyltriethoxysilane reaction tail gas

Abstract

The present invention discloses an absorption and utilization method of polymethyl triethoxy silane reaction exhaust. The method comprises the steps of: (a) inspecting a reactor; (b) heating a reaction column; (c) conducting an alcoholysis reaction; (d) preheating tail gas; and (e) absorbing tail gas. The method improves the yield of the reaction, shortens reaction time, and that, eventually transforms the portion of the feed, which originally runs to a tail gas absorption system and is converted into a solid, into products. The equipment pipes and absorption column are no longer blocked, and the operation rate of absorption efficiency are greatly improved, and the purity of hydrochloric acid after tail gas absorption is greatly improved and close to authentic hydrochloric acid. The method turns waste into treasure, achieves zero emission, and is important to improving the technical level of polymethyl triethoxy silane synthesis and environmental protection.

Description

technical field [0001] The invention belongs to the technical field of polymethyltriethoxysilane synthesis, and in particular relates to a method for absorbing and utilizing reaction tail gas of polymethyltriethoxysilane. Background technique [0002] Organosilicon products have become an indispensable chemical material for people to develop production and improve the living environment, and their demand is also increasing exponentially. Organosilicon compounds and the organosilicon materials made from them are various and have excellent performance. They have developed rapidly in recent years. . The intermediate of organoalkoxysilane contains two groups with completely different chemical properties. These two groups can be closely combined with organic matter and inorganic matter respectively, and become a bridge between organic matter and inorganic matter, so they are widely used. It can be used as surface modifier of inorganic filler, paint modifier and resin modifier, e...

AI Technical Summary

Problems solved by technology

However, the composition of the reaction tail gas during the synthesis of polymethyltriethoxysilane is complex, and the synthesis tail gas of polymethyltriethoxysilane contains nitrogen, hydrogen chloride, ethanol, monomethyltrichlorosilane, and low-boiling-point silane produced by the reaction. Compounds, monomethyltrichlorosilane and some low-boiling compounds are hydrolyzed when they meet water, and a chain reaction at a certain temperature produces solid substances such as silicone rubber, which can easily block equipment such as pipelines and absorption towers, making the tail gas absorption device unable to operate normally, resulting in polyformaldehyde The purity of triethoxysilane is not high, the yield is reduced, the tail gas absorption utilization rate is reduced, and it is discharged into the air to pollute the environment

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