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A kind of method of producing 1,3,3,3-tetrachloropropene

A technology of tetrachloropropene and carbon tetrachloride, applied in chemical instruments and methods, halogenated hydrocarbon preparation, organic chemistry, etc., can solve the problem of high toxicity of mercury chloride catalyst, high cost of palladium chloride catalyst, and selectivity of target products. To achieve the effect of realizing large-scale industrial production, improving the utilization rate of raw materials, and the process of green environmental protection

Active Publication Date: 2022-04-12
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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  • A kind of method of producing 1,3,3,3-tetrachloropropene
  • A kind of method of 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 producing 1,3,3,3-tetrachloropropene. The method adopts a reactive distillation integrated device mainly composed of a rectification tower and a side reactor coupling, and uses carbon tetrachloride and acetylene As a raw material, the carbon tetrachloride dissolved in the catalyst is fed into the first side reactor coupled with the rectification tower through the absorption tower, and acetylene is continuously fed into each side reactor connected with the rectification tower, and in the side reactor , an addition reaction occurs under the action of light and a catalyst, and the liquid phase material obtained by the reaction enters the rectification tower, and the required product is extracted from the first plate on the upper part of the rectification tower; or when there are two or more side reactors After the liquid phase material of the rectification tower is extracted, it enters the next-stage side reactor to continue the reaction, and then returns to the next extracted tray, and the required product is extracted from the first plate on the upper part of the rectification column. The advantage of the present invention is that it can produce 1,3,3,3-tetrachloropropene with high conversion rate and selectivity.

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 Patents(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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