Method and device for separating and reducing methylchlorosilane impurities through organosilicon contacts

Abstract

The invention provides a method and a device for separating and reducing methylchlorosilane impurities through organosilicon contacts. A separation method of the organosilicon contacts is included, and a screened solid phase is returned to a fluidized bed for a methylchlorosilane reaction. The separation method of the organosilicon contacts comprises the following steps: separating a solid phase from syngas produced during synthesis of methylchlorosilane; screening a separated solid phase. A system for reducing the impurity content of a methylchlorosilane product comprises the fluidized bed, acollecting device and a separation device of the organosilicon contacts, wherein the fluidized bed is connected with a solid phase separator and a screening machine; the collecting device is connected with the screening machine. The solid phase in the syngas is separated through the separator, solid-phase particles with the particle size of 200-325 microns are separated out and returned into thefluidized bed, the separated solid-phase particles are mostly contacts formed through good combination of silicon powder and a catalyst, and a gas-solid reaction is performed on the contacts and gas-phase methyl chloride in the fluidized bed to obtain dimethyldichlorosilane, so that the production probability of the dimethyldichlorosilane is increased.

Description

technical field [0001] The invention relates to the technical field of organosilicon, in particular to a method and device for separating organosilicon contacts, and a method and device for reducing the impurity of methylchlorosilane. Background technique [0002] Methylchlorosilane is the most important monomer for the preparation of silicone polymers. Among them, the consumption of dimethyldichlorosilane is the largest, accounting for about 90% of methylchlorosilane. [0003] In the fluidized bed reactor for the production of dimethyldichlorosilane, silicon powder and copper catalyst are mixed to form an active contact body. As the reaction time prolongs, the deposits on the surface of the contact body will become more and more, and the particles will become more and more Larger, larger-particle contact body activity is reduced, resulting in a lower probability of dimethyldichlorosilane synthesis, so the solid phase with larger particles needs to be filtered out; with the...

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Problems solved by technology

[0005] The invention provides a method and device for separating organosilicon contacts, and a method and device for reducing the impurities of methylchlorosilane, so as to solve the problem that larger particles and smaller particles cannot be filtered out and affect the synthesis of dimethyldichlorosilane matter of probability

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