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Separation system for by-product high-boiling matter in tetrachloroethylene production and separation method

A technology for by-producing high boilers and tetrachloroethylene, applied in chemical instruments and methods, halogenated hydrocarbon disproportionation separation/purification, organic chemistry, etc., can solve the problems of complex process, inability to separate operating temperature, and high process energy consumption, Achieve the effect of reducing sublimation temperature, product sublimation temperature, and process energy consumption

Inactive Publication Date: 2018-01-12
DONGGUAN DONGYANG SOLAR SCI RES & DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problems existing in the prior art that hexachlorobutadiene, hexachlorobenzene and hexachloroethane in the by-product high boilers in the production of tetrachlorethylene cannot be effectively separated, and the operating temperature of the treatment process is too high, and the process is complicated , process energy consumption is too high, etc., the present invention provides a separation system and separation method for by-product high boilers in the production of tetrachlorethylene

Method used

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  • Separation system for by-product high-boiling matter in tetrachloroethylene production and separation method
  • Separation system for by-product high-boiling matter in tetrachloroethylene production and separation method
  • Separation system for by-product high-boiling matter in tetrachloroethylene production and separation method

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Embodiment 1

[0085] This embodiment provides a separation system for by-product high boilers in the production of tetrachlorethylene, said system comprising a decompression sublimation unit 1, a desublimation unit 2, a first rectification tower 3, a hexachloroethane separation system and Hexachlorobenzene separation system; Wherein, the gas material outlet of decompression sublimation unit 1 links to each other with desublimation unit 2 feed ports, and the light component material outlet of desublimation unit 2 links to each other with the feed port of the first rectifying tower 3, The heavy component material outlet of the desublimation device 2 is connected with the feed inlet of the hexachloroethane separation system, and the solid material outlet of the decompression sublimation device 1 is connected with the hexachlorobenzene separation system.

[0086] The hexachloroethane separation system comprises a first washing tower 4, a crystallization unit 5, a first filtering unit 6 and a sec...

Embodiment 2

[0089] This embodiment provides a separation system for by-product high boilers in the production of tetrachlorethylene. Except that the first filter device 6 is a plate and frame filter, and the second filter device 9 is a plate and frame filter, other structures are similar to those of the implementation Same as in Example 1.

Embodiment 3

[0091] This embodiment provides a separation system for by-product high boilers in the production of tetrachlorethylene, except that the first filter device 6 is a chamber filter press, and the second filter device 9 is a chamber filter press, the other structures are Same as in Example 1.

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Abstract

The invention provides a separation system for by-product high-boiling matter in tetrachloroethylene production and a separation method. The system comprises a decompression sublimation device, a desublimation device, a first rectifying tower, a hexachloroethane separation system and a hexachlorobenzene separation system, wherein a gas material outlet of the decompression sublimation device is connected with a feeding port of the desublimation device, a light-component material outlet of the desublimation device is connected with a feeding port of the first rectifying tower, a heavy-componentmaterial outlet of the desublimation device is connected with a feeding port of the hexachloroethane separation system, and a solid material outlet of the decompression sublimation device is connectedwith the hexachlorobenzene separation system. According to the method, the byproduct high-boiling matter in the tetrachloroethylene production is separated and purified one by one through processes such as decompression sublimation, washing by using a solvent, recrystallization and rectification, and high-efficiency separation of hexachloroethane, hexachlorobutadiene and hexachlorobenzene is realized; and by adopting a mode of the decompression sublimation, a sublimation temperature of the product is reduced, energy consumption of the whole technological process is effectively reduced, and production costs are greatly reduced.

Description

technical field [0001] The invention belongs to the field of organic chemistry, and relates to a separation system and a separation method for high boiling substances, in particular to a separation system and a separation method for by-product high boiling substances in the production of tetrachlorethylene. Background technique [0002] Perchlorethylene is an important organochlorine product, often used as an organic solvent, dry cleaning agent and metal degreasing agent. At present, the production methods of tetrachlorethylene mainly include acetylene method, dichloropropane pyrolysis method, dichloroethane oxychlorination method, C1~C3 hydrocarbon thermal chlorination method, ethylene direct chlorination method, etc. A certain amount of organic hazardous waste will be produced in the production process of tetrachlorethylene, including carbon tetrachloride, tetrachloroethylene, hexachloroethane, hexachlorobutadiene and hexachlorobenzene, etc. If these organic hazardous wast...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C17/38C07C17/392C07C21/12C07C21/21C07C19/043C07C25/12
Inventor 李义涛马鹏程余航黄永锋姚文强游孟梦
Owner DONGGUAN DONGYANG SOLAR SCI RES & DEV CO LTD
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