Contact masses processing method during methylchlorosilane synthesis

Abstract

The invention relates to the field of organic chemistry, in particular to a method for processing and recovering contacts in the synthetic process of methyl chlorosilane, which is characterized by comprising the following steps: adding an intermediate storage tank of the contacts in the process of synthesizing the methyl chlorosilane; when the selectivity of a target product is reduced to between 70 and 90 percent, transferring the contacts in the reaction system to the intermediate storage tank; re-adding new contacts to react in a fluidized bed, and mixing the transferred contacts with fresh silicon powder; and returning the mixture to the fluidized bed to use the mixture as new contacts to be added to the reaction. In the invention, the production method is used to not only ensure the stability of the selectivity for dimethyl dichlorosilane in the synthetic process of the methyl chlorosilane, and prolong the synthetic cycle of organochlorosilane simultaneously. The effective production time of the production device can be up to over 50 days.

Description

technical field

[0001] The invention relates to the field of organic chemistry, in particular to a method for treating and recovering contacts in the synthesis process of methylchlorosilane. Background technique

[0002] Methylchlorosilane is the most important intermediate raw material for the preparation of silicone polymers, and also the basic raw material for the preparation of other silicon-functional silanes. Among them, the consumption of dimethyldichlorosilane (M2) is the largest, accounting for about 90% of methylchlorosilane. Therefore, organic silicon manufacturers at home and abroad use the selectivity of dimethyldichlorosilane as an assessment index for the synthesis efficiency, and at the same time, the length of the synthesis cycle is also reduced to a certain level by the selectivity of dimethyldichlorosilane. Measured by the extent, under the premise of ensuring a high selectivity of M2, the longer the synthesis production cycle, the higher the level of the...

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