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Method for producing 1,3,3,3-tetrachloropropene

A technology of tetrachloropropene and carbon tetrachloride, applied in chemical instruments and methods, chemical industry, climate sustainability, etc., can solve the problem of high toxicity of mercuric chloride catalyst, high cost of palladium chloride catalyst and target product selectivity Low-level problems, to achieve large-scale industrial production, improve raw material utilization, and process green environmental protection

Active Publication Date: 2020-08-18
常州新东化工发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are bibliographical reports to synthesize 1,3,3,3-tetrachloropropene by catalyzing carbon tetrachloride and acetylene in an autoclave with mercuric chloride or palladium chloride, and the mercuric chloride catalyst used in this method is more toxic, The cost of palladium chloride catalyst is high, and 1,3,3,3-tetrachloropropene is easily thermally decomposed at high temperature, resulting in low selectivity of the target product

Method used

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  • Method for producing 1,3,3,3-tetrachloropropene

Examples

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Embodiment 1

[0027] In a rectification tower with a diameter of 0.8m and 15 trays (the number of trays in the reactive distillation area is 1, and the number of trays in the stripping area is 14), with a volume of 5m 3 The tank-type side reactor is connected, wherein the carbon tetrachloride condensate at the top of the tower and the carbon tetrachloride absorption liquid of acetylene all enter the first side reactor, and the outlet material of the side reactor returns to the first tray of the rectification tower ( The number of trays is counted from top to bottom), and the material between the rectification column and the side reactor is transported by the pump.

[0028] The side reactor is equipped with a light source of partial ultraviolet wavelength and carbon tetrachloride, and the content of the catalyst Cu-EDTA is 0.1%. The feed flow rate of carbon tetrachloride containing 0.1% catalyst to the side reactor is 4.0kmol / h, the feed flow rate of acetylene to the side reactor is 4.0kmol / ...

Embodiment 2

[0030] In a rectification tower with a diameter of 0.8m and 15 trays (there are 7 trays in the reactive distillation area and 8 trays in the stripping area), and two units with a volume of 3m 3 The tank-type side reactors are connected to each other, and the number of trays between the reactors is 5. Among them, the condensate of the vapor phase material at the top of the tower and the carbon tetrachloride absorption liquid of the non-condensable gas all enter the first side reactor, and the side reaction The material at the outlet of the reactor returns to the first tray of the rectification column (the number of trays is counted from top to bottom); the material from the sixth rectification tray enters the second reactor, and the outlet material of the side reactor returns to the rectification column On the seventh tray, the material between the rectification column and the side reactor is pumped.

[0031] Each side reactor is equipped with a light source of partial ultravio...

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Abstract

The invention discloses a method for preparing 1,3,3,3-tetrachloropropene. According to the method, a reactive distillation integrated device mainly formed by coupling a rectifying tower and a side reactor is adopted; and carbon tetrachloride and acetylene are used as raw materials. The method comprises the following steps: introducing carbon tetrachloride with a dissolved catalyst into a first side reactor coupled with a rectifying tower through an absorption tower; continuously introducing acetylene into each side reactor connected with the rectifying tower, carrying out an addition reactionin the side reactors under the action of light and a catalyst, introducing the liquid-phase material obtained by the reaction into the rectifying tower, and extracting a required product from the first plate in the upper part of the body of the rectifying tower; (or when the number of the side reactors is more than two, extracting and introducing the liquid-phase material of the rectifying towerinto the next-stage side reactor for continuous reaction, then returning to the next tower plate, and extracting the required product from the first plate in the upper part of the body of the rectifying tower. The method has the advantage that the 1,3,3,3-tetrachloropropene conversion rate and selectivity are high.

Description

technical field [0001] The invention relates to the field of preparation of an intermediate, in particular to a method for producing 1,3,3,3-tetrachloropropene. Background technique [0002] 1,3,3,3-tetrachloropropene is an important organic intermediate, which can be used to prepare a variety of fluorocarbons, such as 1,3,3,3-tetrachloropropene and hydrogen fluoride can synthesize 1-chloro- 3,3,3-trifluoropropene and 1,3,3,3-tetrafluoropropene. Among them, in the fluorine refrigeration industry, 1,3,3,3-tetrafluoropropene has low ozone depletion potential (ODP) and low greenhouse effect potential (GWP), and is considered to be an alternative to 1,1,1,2- Tetrafluoroethane (HFC-134a), l,1,1,2,2-pentafluoroethane (HFC-125) and other high-GWP third-generation refrigerants have broad application value. Therefore, the synthesis of 1,3,3,3-tetrachloropropene has certain research value. At present, there are bibliographical reports to synthesize 1,3,3,3-tetrachloropropene by cat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C17/275C07C17/383C07C21/04
CPCC07C17/275C07C17/383C07C21/04Y02P20/10
Inventor 张驰朱成明孙运林马凯刘向超董亮陶文平王顺利
Owner 常州新东化工发展有限公司
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