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Method for preparing tetramethylsilane

A technology of tetramethylsilane and methylchlorosilane, applied in the direction of silicon organic compounds and the like, can solve the problems of high cost, increased purification difficulty, easy introduction of impurities, etc., and achieves the effect of low production cost

Active Publication Date: 2018-12-07
CHINA SILICON CORP LTD +1
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  • Abstract
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  • Claims
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Problems solved by technology

However, both of the above two methods face problems such as harsh reaction conditions, low system yield, and high cost in the direct synthesis method to prepare tetramethylsilane. At the same time, it is easy to introduce impurities and side reactions, which increase the difficulty of further purification.

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  • Method for preparing tetramethylsilane
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Embodiment Construction

[0017] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention is capable of various changes in different embodiments without departing from the scope of the present invention, and that the description and illustrations therein are illustrative in nature and not limiting. this invention.

[0018] One embodiment of the present invention provides a method for the preparation of tetramethylsilane, including low boilers produced in the process of synthesizing organosilicon monomer (especially methylchlorosilane) by direct method or containing lower concentration of tetramethylsilane The methylchlorosilane mixture is used as a raw material, and it is recovered and purified to obtain tetramethylsilane.

[0019] Among them, the methylchlorosilane mixture includes dimethylchlorosilane, methyldichlorosilane, methyltrichlorosilane, trimethylsilane, t...

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Abstract

One embodiment of the invention provides a method for preparing tetramethylsilane. The method comprises the following steps: taking a mixture of low-boiling-point substances or methyl chlorosilane produced in the process of synthesizing organosilicone monomers by a direct method as the raw material, and performing purification treatment, thereby obtaining the tetramethylsilane. According to the preparation method in the embodiment of the invention, the mixture of the low-boiling-point substances or methyl chlorosilane produced in the process of synthesizing the organosilicone monomers by the direct method serves as the raw material, the production cost is low, and tetramethylsilane with high purity can be prepared.

Description

technical field [0001] The invention relates to a method for preparing tetramethylsilane, in particular to a method for preparing tetramethylsilane through purification. Background technique [0002] In the production of organosilicon, methyl chloride reacts with metal silicon to form methylchlorosilane, the main product is dimethyldichlorosilane, accounting for more than 80% of the total, and at the same time, a large amount of methylchlorosilane mixture is also produced. Including dimethylchlorosilane, methyldichlorosilane, methyltrichlorosilane, trimethylsilane, tetramethylsilane, silicon tetrachloride, trichlorosilane and the like. Related products in these by-products have high added value after refining, and have high economic value after sorting and recycling. For example, silicon tetrachloride is used to make optical fiber preform rods, and trichlorosilane can be used as raw materials for polysilicon. Base silane and tetramethyl silane can be used for low dielectric...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F7/08C07F7/20
CPCC07F7/20
Inventor 严大洲刘见华万烨赵雄赵宇郭树虎
Owner CHINA SILICON CORP LTD
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