Production line for producing trimethylchlorosilane by virtue of tower lamination method

Abstract

The invention relates to a production line for producing trimethylchlorosilane by virtue of a tower lamination method. The production line comprises a filler rectifying tower, a plate type reaction tower and a heating kettle which are sequentially arranged from top to bottom, wherein the bottom of the filler rectifying tower is communicated with the top of the plate type reaction tower, the top ofthe heating kettle is connected with the side wall of the lower part of the plate type reaction tower through a communication pipe, a hexamethyldisiloxane inlet pipe is arranged on the outer wall ofthe upper part of the plate type reaction tower, and a hydrogen chloride gas pipe for introducing dried hydrogen chloride gas is connected to the side wall of the heating kettle; a condenser is connected to the top of the filler rectifying tower through an air outlet pipe, and the bottom of the condenser is connected with the side wall of the upper part of the filler rectifying tower through a reflux pipe; and a discharging pipe for discharging trimethylchlorosilane is arranged on the side wall of the condenser. The production line has the beneficial effects that the production cost is low, the structure is simple, the production efficiency is high, the reaction promotion effect is good, the recycling rate is high, and the service life is long.

Description

technical field [0001] The invention relates to a production line for producing trimethylchlorosilane by a tower stacking method and a production method thereof. Background technique [0002] Trimethylchlorosilane is an important protective silylation reagent, which is widely used in the synthesis of spices and organic drugs. With the development of cephalosporins in recent years, its application is becoming more and more extensive, and the demand is also increasing It is large and needs to be imported in large quantities every year to meet the demand. Chlorotrimethylsilane is mainly obtained by converting hexamethyldisiloxane. Its production methods mainly include the following: 1. SOCL2 method, hexamethyldisiloxane Alkanes react with SOCL2, this method generates by-product SO2, and SOCL2 consumption is very large, it is not convenient to adopt in industry; The generated water is absorbed by concentrated sulfuric acid, the amount of three wastes is large, the production co...

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Problems solved by technology

[0002] Trimethylchlorosilane is an important protective silylation reagent, which is widely used in the synthesis of spices and organic drugs. With the development of cephalosporins in recent years, its application is becoming more and more extensive, and the demand is also increasing It is large and needs to be imported in large quantities every year to meet the demand. Chlorotrimethylsilane is mainly obtained by converting hexamethyldisiloxane. Its production methods mainly include the following: 1. SOCL2 method, hexamethyldisiloxane Alkanes react with SOCL2, this method generates by-product SO2, and SOCL2 consumption is very large, it is not convenient to adopt in industry; The generated water is absorbed by concentrated sulfuric acid, the amount of three wastes is large, the production cost is high, and it is difficult to be applied to industrial production; 3, the PCL5 method, the by-product of the reaction is POCL3, which can better meet industrial production, but this process is harmful to hexamethyl The purity requirement of disiloxane is higher (content more than 98%); 4, ALCL3 method, this method yield is low (77%), and purity is low, and three wastes amount is big, and industrial production is difficult for adopting; 5, hydrogen chloride method, but There are great difficulties in the application of this method to production. Either the reaction is required below -20 degrees Celsius, or the reaction is pressurized above 1.47Mpa, and the production equipment is relatively high. The production method of the existing production of trimethylchlorosilane has a production cost High, the production equipment occupies a large area, the investment is high, the reaction has high requirements for production, and the precision of the conveying equipment between the connecting parts is relatively large. At the same time, the service life of each conveying equipment is greatly reduced due to the corrosiveness of the product. At the same time, the production efficiency is low, the substances after the reaction cannot be fully recycled, and the resource consumption is large. The reaction tower used for the reaction is inefficient in promoting the reaction, which cannot meet the increasing production requirements, and the effect of promoting the reaction is limited.

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