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Method for preparing alkoxy silane from organic silicon by-product

A technology of alkoxysilane and silicon by-products, applied in the field of utilization of organic silicon by-products, can solve the problems of single, high processing cost, and ineffective utilization, and achieve low energy consumption, high purity, high economic and social benefits Effect

Pending Publication Date: 2022-01-21
ZHEJIANG QUZHOU GUIBAO CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the problems of high processing cost and ineffective utilization of organic silicon by-products in the prior art, the present invention provides a method for preparing alkoxysilanes from organic silicon by-products. The present invention makes chlorosilane or a mixture of chlorosilane and alcohol continuous chemical reaction to obtain a single silicone product

Method used

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  • Method for preparing alkoxy silane from organic silicon by-product
  • Method for preparing alkoxy silane from organic silicon by-product

Examples

Experimental program
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Effect test

Embodiment 1

[0037] Preparation of filler loaded with dehydrogenation catalyst: Add 300kg of methanol and 40kg of water into a 1000L hydrolysis kettle, keep the temperature in the kettle at 50°C, add 300kg of methyltrimethoxysilane dropwise, after the dropwise addition, keep the temperature in the kettle at 50°C and continue Stir the reaction for 8 hours to obtain an alkoxysilane hydrolyzate; add 30kg of nickel chloride to the hydrolyzate, stir evenly, then put the alkoxysilane hydrolyzate into the dipping tank, and put the porous ceramic filler into the Immerse it completely in the immersion tank for 16 hours, then take out the filler, put it into a dryer and dry it at 100°C for 4 hours, and then obtain the filler loaded with dehydrogenation catalyst.

[0038] Preparation of methyltrimethoxysilane: methyl dichlorosilane enters the reaction tower at a flow rate of 300k / kg, methanol enters the reaction tower after being vaporized, and the flow rate is 300k / kg; keep the temperature of the kettl...

Embodiment 2

[0042] Preparation of filler loaded with dehydrogenation catalyst: Add 300kg of methanol and 40kg of water into a 1000L hydrolysis kettle, keep the temperature in the kettle at 50°C, add 300kg of methyltrimethoxysilane dropwise, after the dropwise addition, keep the temperature in the kettle at 50°C and continue Stir the reaction for 8 hours to obtain an alkoxysilane hydrolyzate; add 30kg of nickel chloride to the hydrolyzate, stir evenly, then put the alkoxysilane hydrolyzate into the dipping tank, and put the porous ceramic filler into the Immerse it completely in the immersion tank for 16 hours, then take out the filler, put it into a dryer and dry it at 100°C for 4 hours, and then obtain the filler loaded with dehydrogenation catalyst.

[0043] Preparation of methyltrimethoxysilane: a mixture of 30% methyldichlorosilane and 70% methyltrichlorosilane enters the reaction tower at a flow rate of 300k / kg, and methanol enters the reaction tower after being vaporized with a flow ...

Embodiment 3

[0047] Preparation of filler loaded with dehydrogenation catalyst: Add 300kg of methanol and 40kg of water into a 1000L hydrolysis kettle, keep the temperature in the kettle at 50°C, add 300kg of methyltrimethoxysilane dropwise, after the dropwise addition, keep the temperature in the kettle at 50°C and continue Stir the reaction for 8 hours to obtain an alkoxysilane hydrolyzate; add 30kg of nickel nitrate to the hydrolyzate, stir evenly, then put the alkoxysilane hydrolyzate into the immersion tank, and put the porous ceramic filler into the immersion Immerse it completely in the tank for 16 hours, then take out the filler, put it in a dryer and dry it at 100°C for 4 hours, and then get the filler loaded with dehydrogenation catalyst.

[0048] Preparation of tetraethoxysilane: a mixture of 40% trichlorosilane and 60% silicon tetrachloride enters the reaction tower at a flow rate of 300k / kg, and the ethanol enters the reaction tower after being vaporized with a flow rate of 460...

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Abstract

The invention relates to the technical field of utilization of organic silicon by-products, and discloses a method for preparing alkoxy silane from organic silicon by-products in order to solve the problems that in the prior art, the organic silicon by-products are high in treatment cost and cannot be effectively utilized, and the method comprises the following steps: adding the organic silicon by-products and vaporized alcohol into a reaction tower; reacting the organosilicon by-product with an alcohol under catalysis of a dehydrogenation catalyst supported filler; under the action of a condenser at the top of the reaction tower and a kettle type reboiler at the bottom of the reaction tower, allowing the unreacted raw materials to circularly react in the reaction tower; and rectifying the alkoxy silane crude product collected into the kettle type reboiler to obtain an alkoxy silane finished product. According to the method, the single alkoxy silane is prepared from the organic silicon by-product and the alcohol, the problem that the organic silicon by-product is difficult to utilize is solved, high economic benefits and social benefits are achieved, continuous production of the alkoxy silane prepared from the organic silicon by-product is achieved, the energy consumption is low, and the product purity is high.

Description

technical field [0001] The invention relates to the technical field of utilization of organosilicon by-products, in particular to a method for preparing alkoxysilanes from organosilicon by-products. Background technique [0002] In recent years, the domestic organosilicon industry has developed rapidly, and my country has become the world's largest organosilicon producer, and the domestic organosilicon monomer output accounts for more than 70% of the global output. With the rapid expansion of silicone production scale, a large amount of chlorosilane by-products are produced. Some high-purity chlorosilane by-products, such as methyltrichlorosilane and silicon tetrachloride, have wide uses and a large downstream market, but other chlorosilane by-products, such as methyldichlorosilane, are restricted by the downstream market , it is necessary to develop new uses in order to avoid a large backlog of large processing costs. Mixtures of methyldichlorosilane and methyltrichlorosi...

Claims

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Application Information

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IPC IPC(8): C07F7/04C07F7/18
CPCC07F7/188C07F7/04
Inventor 李冲合徐建清王伟金涵刘金磊
Owner ZHEJIANG QUZHOU GUIBAO CHEM