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Method for removing chlorides from alkoxysilane

A technology of alkoxysilane and chloride, which is applied in the direction of silicon organic compounds, chemical instruments and methods, compounds of group 4/14 elements of the periodic table, etc., can solve problems such as small market share and poor product quality, and achieve treatment The effect is simple and convenient

Active Publication Date: 2019-08-27
JIANGXI BLUESTAR XINGHUO SILICONE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although our country has also done some research, due to the great technical defects, the content of alkoxysilane chloride is basically maintained at about 50ppm, and the product quality is poor, so the market share is small

Method used

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  • Method for removing chlorides from alkoxysilane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The 2000kg methyltrimethoxysilane crude product (chromatographic analysis methyltrimethoxysilane content 91%, chlorine content 520ppm, APHA50) that reaction obtains is put into reactor, then adds 2kg anhydrous iron trichloride powder in reactor , in the case of stirring, heat up to 80°C for 2h, distill methanol, continue to heat up to 110°C for 2h, add 0.4kg of octadecyltrimethylammonium chloride, and keep warm for 1.5h; after the reaction is completed ; Cool down to 40°C, add 20kg of 30% sodium methoxide in methanol and stir for 0.5h, the pH of the solution is 10; further distill the methanol and then rectify to obtain a pure product, and obtain a finished product of 1812kg.

Embodiment 2

[0036] According to the same method as Example 1, the difference is that the consumption of anhydrous ferric trichloride is changed into 3kg, octadecyltrimethylammonium chloride 0.6kg.

Embodiment 3

[0038] According to the method identical with embodiment 2, difference is that the methanol solution consumption of 30% sodium methylate changes 30kg into.

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Abstract

The present invention relates to a method for removing chlorides from alkoxysilane. The method comprises the following steps: adding a transition metal chloride into a crude alkoxysilane product, mixing the transition metal chloride with the crude alkoxysilane product, performing a first heating stage, then performing a second heating stage at a higher temperature, adding a cationic surfactant forheat preservation refluxing reaction, cooling the product after the reaction is completed, adding a lower alcohol solution of a lower sodium alkoxidefor neutralization, and then performing rectification to obtain an alkoxysilane product with low chloride content. The chlorine content of the alkoxysilane treated by the method of the invention is as low as 3.2 ppm or less, the electrical conductivity is as low as 0.52 mu s / cm or less, and the hue index is below APHA 30; furthermore, the yield is high, and the loss rate of a product is small. The treatment method of the invention is simple and convenient and low in cost, and no flammable, explosive or toxic chemical reagents are involved in the treatment process, so that no potential safety hazard exists; the method is a method worthy of being commercially popularized and used for refining industrial alkoxysilane.

Description

technical field [0001] The invention relates to the field of organosilicon, in particular to a method for removing chlorides from alkoxysilanes, in particular to a method for removing chlorides from alkoxysilanes used in the electrical and electronic industry. Background technique [0002] Alkoxysilanes are in great demand in the electrical and electronic industry, and the purity requirements are very strict, especially if alkoxysilanes contain chlorides, they are highly corrosive, causing corrosion to equipment and pipelines, and high chloride ions can easily lead to product conductivity High, so the chloride in the alkoxysilane needs to be removed in time. At present, the general removal method is to neutralize with a neutralizer, and to separate the non-volatile components by distillation, but this method cannot remove non-ionic chlorine, and the hue index of the product will obviously increase after treatment, which limits the application in the fields of electronics and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F7/18C07F7/20
CPCC07F7/1804C07F7/20
Inventor 王度叶丹李钊
Owner JIANGXI BLUESTAR XINGHUO SILICONE CO LTD