Method and device for comprehensively utilizing organosilicon monomer azeotrope by utilizing alcoholysis process

A technology of azeotrope and organosilicon, applied in the direction of silicon organic compounds, etc., can solve the problems of complex components, long contact time, high ethanol consumption, etc.

Pending Publication Date: 2020-09-01
JIANGXI BLUESTAR XINGHUO SILICONE CO LTD
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Problems solved by technology

Because the content of the azeotrope composition changes greatly and the components are complex, the invention does not explain the use of the separated crude trimethylchlorosilane
In addition, in the process of preparing tetraethyl orthosilicate, the amount of ethanol used is higher th

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  • Method and device for comprehensively utilizing organosilicon monomer azeotrope by utilizing alcoholysis process

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Embodiment Construction

[0066] The technical solutions of the present invention will be further described in detail below in conjunction with specific embodiments. It should be understood that the following examples are only for illustrating and explaining the present invention, and should not be construed as limiting the protection scope of the present invention. All technologies realized based on the above contents of the present invention are covered within the scope of protection intended by the present invention.

[0067] Unless otherwise stated, the raw materials and reagents used in the following examples are commercially available or can be prepared by known methods.

[0068] The azeotrope used in the embodiment consists of silicon tetrachloride content 30%, trimethylchlorosilane 65%, methyldichlorosilane 3.5%, tetramethylsilane 1.5% (synthesized by Jiangxi Lanxing Huo Silicone Co., Ltd. Provided by monomer fractionation unit).

[0069] The device used in the embodiment and its connection m...

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Abstract

The invention provides an alcoholysis process of an organosilicon monomer azeotrope and a method for comprehensively utilizing the organosilicon monomer azeotrope based on the alcoholysis process. According to the alcoholysis process, under the vacuum condition, azeotrope is sequentially subjected to a liquid-phase alcoholysis reaction and a gas-phase alcoholysis reaction with liquid-phase alcoholand gas-phase alcohol, the process does not need to carry out low-boiling-point substance removal treatment on the azeotrope in advance, process steps and equipment investment are reduced, and energyconsumption and cost are reduced; meanwhile, the alcoholysis efficiency is high, generated hydrogen chloride can be removed in time, side reactions are avoided, and the alcohol consumption is obviously reduced. A process for preparing polysiloxane from tetraalkoxysilane and a process for preparing hexamethyldisiloxane by hydrolyzing trimethylchlorosilane are added at the downstream of an alcoholysis process, so that the aim of comprehensively utilizing azeotrope is fulfilled.

Description

technical field [0001] The invention belongs to the field of organosilicon by-product treatment, and in particular relates to an alcoholysis process, a method for comprehensively utilizing organosilicon monomer azeotropes by using the alcoholysis process and a production device thereof. Background technique [0002] The direct method of producing methylchlorosilane is a production process of methyl chloride and silicon powder under the action of copper catalyst to produce dimethyldichlorosilane. Due to the influence of process conditions, raw material components, etc., in addition to the main product, other by-products will be produced, among which the components of silicon tetrachloride (boiling point 57.4°C) and trimethylchlorosilane (57.7°C) are called organosilicon Monomer azeotrope, the composition content is usually: the content of silicon tetrachloride is 30-35%, the content of trimethylchlorosilane is 60-65%, and the remaining components are methyldichlorohydrosilane...

Claims

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Application Information

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IPC IPC(8): C07F7/04C08G77/02
CPCC07F7/04C08G77/02
Inventor 廖立颜岭龚文王海栋
Owner JIANGXI BLUESTAR XINGHUO SILICONE CO LTD
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