Reactor for producing phenyl chlorosilane by using thermal poly-condensation method

Abstract

The invention discloses a reactor for producing phenyl chlorosilane by using a thermal poly-condensation method. The reactor comprises a reactor body, wherein a radiation zone positioned below the reactor body and a convective zone positioned in the middle of the reactor body are arranged in the reactor body; the upper part of the reactor body is also provided with a chimney; a heating section furnace tube is arranged in the radiation zone; a reaction section furnace tube is arranged in the convective zone; a jacket is arranged on the periphery of the reaction section furnace tube; a raw material preheating furnace tube used for recovering smoke gas heat is also arranged at the junction of the chimney and the convective zone; one end of the raw material preheating furnace tube is provided with a raw material inlet; the raw material preheating furnace tube is communicated with the jacket; the jacket is communicated with the radiation section furnace tube; the tail end of the radiation section furnace tube is communicated with the reaction section furnace tube; and the tail end of the reaction section furnace tube is provided with a material outlet. The reactor for producing the phenyl chlorosilane has a simple structure and a safe and energy-saving effect.

Description

technical field [0001] The invention belongs to the field of chemical equipment, in particular to a reactor for preparing phenylchlorosilane. Background technique [0002] At present, there are three methods for producing phenylchlorosilane, which are the Grizzard method, the direct method and the condensation method. [0003] Method 1: format method. Using chlorobenzene and trichlorosilane or methyl dichlorosilane as raw materials, using Grignard reagent as catalyst, adding a certain amount of solvent, and controlling a certain temperature and pressure to produce phenylchlorosilane products. The process is simple and the raw materials are easy to obtain; its disadvantages are: the preparation process of the formatted reagent has high requirements, and sometimes improper control during the reaction process may easily cause punching or explosion; the by-product magnesium chloride and solvent treatment are more complicated; the production efficiency is low; With the emergenc...

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Problems solved by technology

The process is simple and the raw materials are easy to obtain; its disadvantages are: the preparation process of the formatted reagent has high requirements, and sometimes improper control during the reaction process may easily cause punching or explosion; the by-product magnesium chloride and solvent treatment are more complicated; the production efficiency is low; With the emergence of the direct method, the format method has basically been eliminated

Its disadvantages: the amount of catalyst copper is 30-50% (mass ratio) of the amount of silicon powder, and the amount of catalyst is relatively large; the by-products contain polychlorinated biphenyls, which are highly toxic and carcinogenic

In this method, there are many side reactions of materials in the system, and the by-product polychlorinated biphenyl carcinogens are generated. The silicon powder wears the equipment greatly, and there is a phenomenon of periodic equipment replacement, and there is carbon accumulation in the bed, which requires frequent periodic maintenance. equipment

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