Production process for production of tetrachloroethylene and coproduction of hexachloroethane by using methane chloride residual liquid

A technology of methane chloride and tetrachlorethylene, which is applied in the field of methane chloride residual liquid treatment, to achieve the effect of improving corporate profitability and avoiding pollution

Active Publication Date: 2013-05-08
SHANDONG DONGYUE FLUO SILICON MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of this invention is to provide a kind of production process of producing tetrachlorethylene and co-producing hexachloroethane with methane chloride raffinate, which solves the safety and environmental protection problems caused by the incineration of methane chloride raffinate, and improves waste disposal. The utilization rate reduces the production cost

Method used

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  • Production process for production of tetrachloroethylene and coproduction of hexachloroethane by using methane chloride residual liquid
  • Production process for production of tetrachloroethylene and coproduction of hexachloroethane by using methane chloride residual liquid
  • Production process for production of tetrachloroethylene and coproduction of hexachloroethane by using methane chloride residual liquid

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Methane chloride raffinate containing chloroform, carbon tetrachloride, trichloroethylene, tetrachloroethylene, dichloroethane, tetrachloroethane (ratio: 5%: 50%: 10%: 10%: 15 %: 10%) is vaporized and superheated and mixed with vaporized excess chlorine into the reactor. Under the conditions of 580°C, 0.07MPa, and a reaction time of 8 seconds, the gas phase reaction produces tetrachloroethylene, pentachloroethane, and hexachloroethane. , hydrogen chloride, the mixed gas components are carbon tetrachloride, tetrachloroethylene, hydrogen chloride, excess chlorine, pentachloroethane, hexachloroethane, etc.

[0027] The temperature of the gaseous product is reduced to 86.5°C after being quenched by the quenching tower. The crude product of tetrachlorethylene in the gas phase is extracted from the top side line of the quenching tower, and the gas containing carbon tetrachloride, excess chlorine, and hydrogen chloride passes through the third-stage condenser and the separatio...

Embodiment 2

[0031] Methane chloride raffinate containing chloroform, carbon tetrachloride, trichloroethylene, tetrachloroethylene, dichloroethane, tetrachloroethane (ratio: 8%: 46%: 8%: 12%: 12 %: 14%) is vaporized and superheated and mixed with vaporized excess chlorine into the reactor. Under the conditions of 560°C, 0.05MPa, and a reaction time of 8 seconds, the gas phase reaction produces tetrachloroethylene, pentachloroethane, and hexachloroethane. , Hydrogen chloride. The mixed gas components are carbon tetrachloride, tetrachloroethylene, hydrogen chloride, excess chlorine, pentachloroethane, hexachloroethane, etc.

[0032] The temperature of the gaseous product is reduced to 85.2°C after being quenched by the quenching tower. The crude product of tetrachlorethylene in the gas phase is extracted from the top side line of the quenching tower, and the gas containing carbon tetrachloride, excess chlorine, and hydrogen chloride passes through the third-stage condenser and the separatio...

Embodiment 3

[0036] Methane chloride raffinate containing chloroform, carbon tetrachloride, trichloroethylene, tetrachloroethylene, dichloroethane, tetrachloroethane (ratio: 2%: 48%: 11%: 14%: 12 %: 13%) is vaporized and superheated and mixed with vaporized excess chlorine into the reactor. Under the conditions of 575 ° C, 0.06 MPa, and a reaction time of 9 seconds, the gas phase reaction produces tetrachloroethylene, pentachloroethane, and hexachloroethane. , hydrogen chloride, the mixed gas components are carbon tetrachloride, tetrachloroethylene, hydrogen chloride, excess chlorine, pentachloroethane, hexachloroethane, etc.

[0037] The temperature of the gaseous product is reduced to 88.2°C after being quenched by the quenching tower. The crude product of tetrachlorethylene in the gas phase is extracted from the top side line of the quenching tower, and the gas containing carbon tetrachloride, excess chlorine, and hydrogen chloride passes through the third-stage condenser and the separa...

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Abstract

The invention discloses a production process for production of tetrachloroethylene and coproduction of hexachloroethane by using methane chloride residual liquid. According to the production process, the methane chloride residual liquid subjected to vaporization and overheating and excessive chlorine enter a reactor, the mixed gas after reaction enters a chilling tower, a tetrachloroethylene crude product in gas phase is extracted out from the top side line of the chilling tower, the gas containing carbon tetrachloride, excessive chlorine and hydrogen chloride passes through three stages of condensers and a separation tank in sequence, one part of condensed liquid-phase material carbon tetrachloride is used as chilling liquid, and the other part of condensed liquid-phase material carbon tetrachloride is returned to the system for reaction, so that the aim of consuming the methane chloride residual liquid through continuous circulation is achieved; hydrogen chloride and excessive chlorine are absorbed by using water and subjected to steam stripping, and chlorine is returned to the reaction system; the materials at the bottom of the chilling tower are treated in a lightness-removing column, so that the light components including tetrachloroethylene and pentachloroethane are separated and returned to the reactor for reaction; and hexachloroethane is subjected to rectification to obtain a hexachloroethane finished product. According to the production process, the methane chloride residual liquid is subjected to innocent treatment to prevent environmental pollution caused by improper treatment.

Description

technical field [0001] The invention relates to the treatment of methane chloride raffinate, in particular to a production process for producing tetrachlorethylene and co-producing hexachloroethane with methane chloride raffinate. Background technique [0002] Methane chloride is a general term for monochloromethane, dichloromethane, chloroform, and carbon tetrachloride. With the development of organic silicon industry and organic fluorine industry, the demand for methane chloride is increasing. However, the carbon tetrachloride produced in the process of producing methane chloride and the methane chloride raffinate mainly composed of it belong to the national controlled substances and must be effectively treated. At present, carbon tetrachloride can be converted into monochloromethane, chloroform, tetrachloroethylene, and the raffinate of methane chloride mainly contains chloroform, carbon tetrachloride, trichloromethane, tetrachloroethylene, Dichloroethane, tetrachloroet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C21/12C07C19/043C07C17/10C07C17/383
Inventor 于海涛张晶群徐学军
Owner SHANDONG DONGYUE FLUO SILICON MATERIALS CO LTD
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