System and method for tail gas treatment of conversion reaction of organic silicon low-boiling-point substances

Abstract

The invention relates to the field of organic silicon low-boiling-point substance conversion and especially relates to a system and a method for tail gas treatment of conversion reaction of organic silicon low-boiling-point substances. The system comprises a conversion kettle, a washing tower, a return tank and a condenser, wherein the condenser is connected with a tail gas buffering tank through a gas diaphragm compressor, and the tail gas buffering tank is connected with an inlet of the conversion kettle through a circulating pump. The method comprises the following steps: causing the substances to enter into the conversion kettle and have a chemical reaction; washing the gas generated from the reaction through the washing tower, and then condensing through a first-level condenser; causing the condensate to enter into the return tank, performing gas pressurizing, and then entering into a second-level condenser; causing the cooled gas-liquid mixture to enter into the tail gas buffering tank; pumping the condensate into the conversion kettle through the circulating pump; and performing acid pickling on the gas in a tail gas water washing tower, and then emptying. The method has the advantages that the technique is simple; the waste of carried materials is reduced; the conversion ratio of the low-boiling-point substances is increased; the system is in closed cycle, so that the running time of the system is prolonged; the influence of direct tail gas emission on environment is avoided.

Description

technical field [0001] The invention relates to the field of organosilicon production, in particular to a tail gas treatment system and method for conversion reaction of organosilicon low boilers. Background technique [0002] In recent years, the domestic organosilicon monomer and siloxane market is close to saturation. With the expansion of the production scale of organosilicon monomer, the output of by-product monomethyltrichlorosilane and low boilers has been increasing. Monomethyltrichlorosilane can be used to produce fumed silica, silicone resin, crosslinking agent, etc. However, the domestic monomer production enterprises are scattered, and the capacity of a single monomer unit is low, and most of them are unable to build supporting silica units; the market capacity of silicone resin and crosslinking agent is small, resulting in an oversupply of monomethyltrichlorosilane. [0003] The by-products of organosilicon monomer production are low-boiling substances with a b...

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Problems solved by technology

[0005] In order to solve the problem that the tail gas generated during the disproportionation reaction of monomethyltrichlorosilane and low boilers under the action of a high-efficiency catalyst is difficult to handle, the present invention provides a tail gas treatment system and method for conversion reaction of organic silicon low boilers, The technical scheme adopted is as follows:

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