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Method for preparing vinyl trichlorosilane compound

A technology of vinyltrichlorosilane and compound, applied in the field of preparation of vinyltrichlorosilane, can solve the problems of large catalyst consumption, no continuity, waste of acetylene, etc., and achieves high product yield, reduced usage, and process steps. less effect

Inactive Publication Date: 2014-02-12
SHANDONG WANDA SILICONE NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, an important economic factor in the addition reaction is also the loss of acetylene. This loss is caused by unreacted acetylene, and the unreacted acetylene is usually discharged from the process along with the waste gas, which greatly wastes acetylene and increases the cost.
At the same time, the existing process is produced without continuity and consumes a lot of catalyst

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Add toluene solvent with a liquid layer height of 400 mm in the screen-type distributed reactor, then add 30 g / 1000 l of chloroplatinic acid to the toluene solvent, fully mix, control the temperature in the screen-type distributed reactor to 50 ° C, and the pressure to 0.01 MPa;

[0012] Convert acetylene and trichlorosilane with a molar ratio of 1.1:1 into a gaseous mixture, add it to the above-mentioned toluene solvent for sufficient reaction, recover vinyl trichlorosilane by distillation, and transport the remaining acetylene to the tail gas shower In the washing tower, after purification and purification, it is returned to the above reaction process for reuse.

Embodiment 2

[0014] Add the solvent of toluene and xylene mixture with a liquid layer height of 1600 mm in the screen type distribution reactor, then add chloroplatinic acid 50g / 1000l in the toluene and xylene mixture solvent, fully mix, and control the temperature in the screen type distribution reactor 200°C, pressure 0.1 MPa;

[0015] Convert acetylene and trichlorosilane with a molar ratio of 2.0:1 into a gaseous mixture, add it to the above-mentioned toluene and xylene mixture solvent for sufficient reaction, recover vinyltrichlorosilane by distillation, and remove the remaining acetylene It is transported to the tail gas washing tower, purified and then transported back to the above reaction process for reuse.

Embodiment 3

[0017] Add a mixture solvent of toluene, xylene and trimethylbenzene with a liquid layer height of 1000 mm into the screen-type distribution reactor, then add 40 g / 1000 l of chloroplatinic acid to the mixture solvent of toluene, xylene and trimethylbenzene, mix well, and control the screen-type The temperature in the distributed reactor is 120°C, and the pressure is 0.03 MPa;

[0018] Convert acetylene and trichlorosilane with a molar ratio of 1.3:1 into a gaseous mixture, add it to the above-mentioned toluene, xylene and trimethylbenzene mixture solvent for sufficient reaction, recover vinyltrichlorosilane by distillation, and The remaining acetylene is transported to the tail gas washing tower, purified and then transported back to the above reaction process for reuse.

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PUM

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Abstract

The invention discloses a method for preparing a vinyl trichlorosilane compound. The method comprises the following preparation steps: adding a solvent having the liquid layer height in the range from 400 to 1600mm to a meshed plate type distribution reactor, and then adding chloroplatinic acid to the solvent by the amount of 30-50g / 1000l, controlling the temperature in the meshed plate type distribution reactor within the range from 50 to 200 DEG C and the pressure in the range from 0.01 to 0.1MPa; transferring acetylene and trichlorosilane in the mol ratio of (1.1-2.0): 1 and trichlorosilane into a gaseous-state mixture, adding the gaseous-state mixture to the solvent for sufficient reaction, and then recovering the vinyl trichloro silane in a distillation manner, conveying the left acetylene to a tail gas drip washing tower for cleaning and purification, and finally, conveying the purified acetylene back to the reaction process. Compared with the prior art, the method for preparing the vinyl trichlorosilane compound provided by the invention has the characteristics of few process steps, few adverse side reactions, high product yield and the like; and as a result, the dosages of acetylene and of catalyst are greatly reduced, and the yield of product is ensured while the production cost is reduced.

Description

technical field [0001] The invention relates to the field of preparation of vinyltrichlorosilane, in particular to a method for preparing vinyltrichlorosilane compound. Background technique [0002] It is known that, in the presence of a platinum catalyst, the halosilane that has 1 or 2 hydrogen atoms connected to the silicon atom and may contain a monovalent inert organic group is reacted via acetylene, and when the reaction is heated, the That is, in the temperature range of 80-120 ° C, in a liquid diluent and under atmospheric pressure, vinyl halosilanes can be obtained, and the chemical properties of the halosilanes used contain H-SI-bonds. Based on the calculated amount, it is preferred to carry out the reaction with only a slight excess of acetylene. The addition reaction of acetylene with a silane having at least one H-SI-group is carried out in a pot reactor or a reaction column, and efforts have been made to obtain as large a mass transfer surface as possible and a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F7/14
Inventor 何光
Owner SHANDONG WANDA SILICONE NEW MATERIAL CO LTD
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