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Method for simultaneously removing high-boiling-point substances and low-boiling-point substances in organic silicon crude monomer

A technology of organosilicon and high boilers, applied in the field of organosilicon purification, can solve the problem of high energy consumption, reduce equipment investment, reduce investment and land occupation, and simplify the process.

Pending Publication Date: 2022-05-13
LIAOCHENG LUXI CHEM ENG DESIGN
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Both the height-removing tower and the de-lowering tower of the traditional distillation process are nearly 70 meters long, and the energy consumption is very high

Method used

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  • Method for simultaneously removing high-boiling-point substances and low-boiling-point substances in organic silicon crude monomer
  • Method for simultaneously removing high-boiling-point substances and low-boiling-point substances in organic silicon crude monomer

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Embodiment Construction

[0015] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present invention. Unless otherwise indicated, all technical and scientific terms used in the present invention have the same meaning as those commonly understood by those skilled in the technical field to which the invention belongs.

[0016] A method for simultaneous removal of high and low boiling matter from silicone crude monomers, comprising the following steps:

[0017] The silicone crude monomer is passed into one side of the separator of the next tower, the upper part of the next tower realizes the separation of low boiling and monomethyl trichlorosilane, the lower part of the next column realizes the separation of high boiling matter and dimethyldichlorosilane, and the other side of the separator realizes the extraction of monomethyl trichlorosilane and dimethyldichlorosilane.

[0018] In some embodiments, the interior of the next tower ...

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Abstract

The invention discloses a method for simultaneously removing a high-boiling-point substance and a low-boiling-point substance in an organic silicon crude monomer, which comprises the following steps: introducing the organic silicon crude monomer into one side of a partition plate of a dividing wall column, separating the low-boiling-point substance from methyl trichlorosilane at the upper part of the dividing wall column, separating the high-boiling-point substance from dimethyldichlorosilane at the lower part of the dividing wall column, and separating the low-boiling-point substance from the dimethyldichlorosilane at the lower part of the dividing wall column; and the extraction of methyl trichlorosilane and dimethyl dichlorosilane is realized on the other side of the partition plate. On the premise that the same separation purity is achieved, compared with traditional rectification, the method has the advantages that the energy consumption is saved by 15% or above, the investment and land occupation of three devices can be reduced, the equipment investment is reduced by 5% or above, and the process can be simplified.

Description

Technical field [0001] The present invention belongs to the field of silicone purification technology, specifically relates to a method of simultaneous removal of high and low boiling matter in the crude monomer of silicone. Background [0002] The statements herein provide only the background techniques associated with the present invention and do not necessarily constitute the prior art. [0003] In addition to monomers such as monomethyltrichlorosilane, dimethyldichlorosilane, trimethylchlorosilane and monomethylchlorochlorosilane in the reaction products of the silicone production process, there are also low boiling substances such as tetramethylsilane, hydrochlorosilane and high boiling substances such as ethyl chlorosilane and alkyldisilane. The traditional separation process is to first remove the high boiling substance, then remove the low boiling substance, and then separate each monomer one by one. The de-elevation and de-de-ascending columns of the traditional distill...

Claims

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Application Information

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IPC IPC(8): C07F7/12C07F7/20
CPCC07F7/12C07F7/20
Inventor 范芸珠肖光刘立彬闫继勇冯贵俊李长猛任慧敏朱明华
Owner LIAOCHENG LUXI CHEM ENG DESIGN
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