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A gas-phase hydrosilylation process for unsaturated hydrocarbons

A technology of hydrosilylation and hydrosilylation reaction, applied in silicon organic compounds, chemical instruments and methods, organic chemistry, etc., can solve problems such as high content of silicon-hydrogen active bonds, high pressure, uneven dispersion, etc.

Active Publication Date: 2021-04-27
JIANGXI HITO CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are the following disadvantages: the dispersion effect of the reactants is not good, and the dispersion is uneven; in order to increase the target yield, suppress side reactions, and speed up the reaction rate, the reaction process pressure is high and the temperature is high; the reaction is not complete, and the residual silicon after the reaction ends High content of hydrogen active bonds, which affects the quality of the product
[0004] The U.S. Patent No. US8420844B2 discloses a gas-phase hydrosilylation process and device for unsaturated hydrocarbons, but this process still has the disadvantages of high pressure and high temperature in the reaction process

Method used

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  • A gas-phase hydrosilylation process for unsaturated hydrocarbons
  • A gas-phase hydrosilylation process for unsaturated hydrocarbons
  • A gas-phase hydrosilylation process for unsaturated hydrocarbons

Examples

Experimental program
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Effect test

Embodiment 1

[0051] as attached figure 1 As shown, 1 in the figure is a plug flow reactor with a helical structure, and the hydrosilylation reaction reacts in the reactor, 3 is a heat exchange medium distributed around the helical plug flow reactor 1, 4 and 5 are Import and export of heat exchange medium. The helical direction of the helical structure of the plug flow reactor 1 is upward, the flow direction of the heat exchange medium 3 is 4 is the inlet, 5 is the outlet, and the direction of the spiral upward direction of the material in the plug flow reactor 1 is counter flow.

Embodiment 2

[0053] as attached figure 2 As shown, 1 and 2 in the figure are plug flow reactors with a spiral structure, 3 is a heat exchange medium distributed around the spiral plug flow reactors 1 and 2, 4 and 5 are the inlet and outlet of the heat exchange medium exit. Plug flow reactors 1 and 2 are symmetrical and evenly placed structures, the shape and structure of the two plug flow reactors are the same, the diameters of the two plug flow reactors are the same, and the total of the two plug flow reactors is The stroke length is the same, the fluid resistance in the two plug flow reactors is the same, the material of the two plug flow reactors is the same, the heat exchange area of ​​the two plug flow reactors is the same, and the exchange rate of the two plug flow reactors is the same. The thermal efficiency is the same, and the heat exchange medium of the two plug flow reactors is the same, both being heat exchange medium 3.

Embodiment 3

[0055] as attached image 3 As shown, among the figure 6 is an orifice plate, and 7 is an opening. The number of openings 7 corresponds to the number of plug flow reactors, the size of the openings 7 corresponds to the diameter of the plug flow reactors. The reactant material enters the plug flow reactor through the orifice 6 for reaction. After the reaction is completed, the material in the plug flow reactor is collected through another orifice with a similar structure to the orifice 6 and enters the next process.

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Abstract

The invention belongs to the field of organosilicon chemical industry, and relates to a gas-phase hydrosilylation process of unsaturated hydrocarbons, in which a hydrocarbon compound (A) with carbon-carbon multi-bonds and a polysiloxane compound (B) with silicon-hydrogen active bonds are carried out. The hydrosilylation reaction generates the alkylsilane compound (C); the hydrosilylation reaction is carried out in a plug-flow reactor, and the plug-flow reactor has a helical structure. The alkylsilane product obtained according to the invention has a residual silicon hydrogen content of less than 100ppm, and is suitable for the fields of lubrication, demoulding, waterproofing and the like.

Description

technical field [0001] The invention belongs to the field of organosilicon chemical industry, in particular to a gas-phase hydrosilylation process of unsaturated hydrocarbons. Background technique [0002] Alkyl silane products are important chemical products, which are used in lubrication and mold release, and have good effects. [0003] The conventional synthetic method of alkylsilane products is to carry out hydrosilylation reaction between alkenes and alkynes containing unsaturated carbon-carbon bonds and small molecule silanes containing silicon-hydrogen active bonds. However, there are the following disadvantages: the dispersion effect of the reactants is not good, and the dispersion is uneven; in order to increase the target yield, suppress side reactions, and speed up the reaction rate, the reaction process pressure is high and the temperature is high; the reaction is not complete, and the residual silicon after the reaction ends The high content of hydrogen active ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G77/38C08G77/12C07F7/08
CPCC07F7/0879C08G77/12C08G77/38
Inventor 廖洪流彭仼远刘涛
Owner JIANGXI HITO CHEM
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