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A method for automatic and continuous production of haloalkyltrialkoxysilane

A technology of haloalkyltrialkoxysilane and haloalkyltrichlorosilane is applied in the field of automatic control and continuous production of haloalkyltrialkoxysilane, which can solve the problem of increasing the cost of manpower and material resources, incomplete alcoholysis of organochlorosilane, Unable to remove HCl and other problems

Active Publication Date: 2017-08-01
江西宏柏新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At the same time, the solubility of HCl in the product is quite large, and a large amount of HCl dissolved in the product will seriously affect its application effect, so a large amount of neutralizing agent is needed for neutralization, and the first product after neutralization will be subjected to rectification operation again, so that Increased cost of manpower and material resources
[0007] Therefore, the removal of the by-product HCl in the reaction is very important, and the prior art such as the common single-tower method and the double-tower method cannot completely remove HCl
[0008] Another major problem in the alcoholysis reaction is the incomplete alcoholysis of organochlorosilanes, resulting in the formation of partially alcoholysed alkoxyorganochlorosilanes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1. Continuous production of γ-chloropropyltriethoxysilane (γ2) by automatic control double-tower method.

[0028] Step (1), esterification tower process:

[0029] The anhydrous ethanol is pressed into the vaporizer, and enters the esterification tower after being vaporized. γ-Chloropropyltrichlorosilane (γ1) is continuously fed into the top of the esterification tower with a pump. γ1 and absolute ethanol undergo esterification reaction in the ceramic packing esterification tower. The by-produced HCl enters the vacuum tail gas pipeline through the top condenser, and is used for the synthesis of trichlorosilane after being recovered by vacuum compression. The ethanol condensed by the condenser and the unreacted γ1 are returned to the esterification tower to continue the reaction. The operating pressure is 0.03-0.05MPa, the temperature in the tower is 50-70°C, and the temperature in the bottom of the tower is 120-150°C. The whole process adopts automatic control...

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Abstract

The invention provides a method for automation continuous production of halogen alkylation triethoxysilane. The method comprises an esterification process, a steam stripping process, a hydrogen chloride recovery process and the like. In the whole process, automation control is adopted, and continuous feeding operation and continuous separating operation are achieved. The method for automation continuous production of halogen alkylation triethoxysilane has the advantages of being high in production efficiency, high in product purity, free of partial alcoholysis by-products and hydrogen chloride residues, low in energy consumption, short in reaction period, low in production cost and the like.

Description

technical field [0001] The invention relates to an automatic control method for continuously producing haloalkyltrialkoxysilane. Background technique [0002] The alcoholysis of organochlorosilanes is one of the most commonly used methods for preparing organoalkoxysilanes in industry. Organochlorosilane and absolute ethanol undergo alcoholysis reaction to synthesize organoalkoxysilane. The water jet vacuum method is commonly used in industry, that is, in the sealed reaction equipment, absolute ethanol is added dropwise to the organochlorosilane reaction solution under stirring. At the same time, a vacuum pump is used to make the reaction proceed under negative pressure, and most of the by-product HCl produced in the reaction is absorbed by lye or water under negative pressure, thus obtaining an acidic organoalkoxysilane product; and then neutralizing the product Hydrogen chloride in the neutral product is separated and purified. This method cannot remove HCl in time. [0...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F7/18C07F7/20C01B33/107
Inventor 叶科文齐官军田丹
Owner 江西宏柏新材料股份有限公司