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Method for recovering organic chloride from rectification residues of methane chloride or/and tetrachloroethylene

A technology of methane chloride and tetrachlorethylene, applied in the chemical field, can solve the problems of waste of organic chloride resources, complicated process, and many equipments, and achieve the effect of increasing income, simple process, and less investment in equipment

Active Publication Date: 2015-04-08
山东中盛药化设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This treatment method not only has a lot of equipment, large investment, complicated process and high cost, but also wastes a lot of useful organic chloride resources.

Method used

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  • Method for recovering organic chloride from rectification residues of methane chloride or/and tetrachloroethylene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The method for reclaiming organic chlorides from the rectification residue of methane chlorides, its process route is as follows figure 1 As shown, it specifically includes the following steps:

[0019] (1) Put the rectification residue of methane chloride into the evaporator, turn on the vacuum pump, keep it warm for 30 minutes under the conditions of vacuum degree of 0.05MP and temperature of 145°C, condense the evaporated volatile components into liquid and enter the trap In the collector, the light component mixed liquid is obtained, and the material in the evaporator is transferred to the sublimator while it is hot;

[0020] (2) Pump 60% of the total volume of the light component mixed liquid obtained in the trap in step (1) into the tetrachlorethylene rectification system to separate chloroform, carbon tetrachloride and tetrachloroethylene; The obtained chloroform and carbon tetrachloride are used as raw materials for the production of tetrachlorethylene, and tet...

Embodiment 2

[0027] The method for reclaiming organic chlorides from the rectification residue of tetrachlorethylene, its process route is as follows figure 1 As shown, it specifically includes the following steps:

[0028] (1) Put the rectification residue of tetrachlorethylene into the evaporator, turn on the vacuum pump, keep it warm at a vacuum degree of 0.01MP and a temperature of 140°C until no liquid evaporates, and condense the evaporated volatile components into liquid After entering the trap, the light component mixed liquid is obtained, and the material in the evaporator is transferred to the sublimator while it is hot;

[0029] (2) Pump 50% of the total volume of the light component mixed liquid obtained in the trap in step (1) into the tetrachlorethylene rectification system to separate chloroform, carbon tetrachloride and tetrachloroethylene; The obtained chloroform and carbon tetrachloride are used as raw materials for the production of tetrachlorethylene, and tetrachloreth...

Embodiment 3

[0036] The method for reclaiming organic chloride after mixing the rectification residue of methane chloride and tetrachloroethylene, its process route is as follows figure 1 As shown, it specifically includes the following steps:

[0037] (1) Mix the rectification residue of methane chloride and tetrachlorethylene according to the ratio of 1:1, then pass it into the evaporator, turn on the vacuum pump, and keep warm at a vacuum degree of 0.1MP and a temperature of 150°C until no liquid evaporates So far, the evaporated volatile component is condensed into a liquid and then enters the trap to obtain a light component mixed liquid, and the material in the evaporator is transferred to the sublimator while it is hot;

[0038] (2) Pump 70% of the total volume of the light component mixed liquid obtained in the trap in step (1) into the tetrachlorethylene rectification system to separate chloroform, carbon tetrachloride and tetrachloroethylene; The obtained chloroform and carbon t...

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Abstract

The invention discloses a method for recovering organic chloride from rectification residues of methane chloride or / and tetrachloroethylene. The method specifically comprises the steps of leading the rectification residues of methane chloride and tetrachloroethylene into an evaporator to perform evaporation, condensing volatile components into liquid and then feeding the liquid into a trap device and transferring the residues into a sublimator; using a tetrachloroethylene rectification system to separate trichloromethane, carbon tetrachloride and the tetrachloroethylene from a part of light component mixed liquid; meanwhile sublimating the residues in the sublimator under the 240-250 DEG C condition, cooling the residues through a condensation device to obtain an initial hexachloroethane product; leading the light component mixed liquid into a refining pan, adding and dissilving the initial hexachloroethane product and then transferring the product into a crystallizing pan for crystallization; performing filtration after the crystallization, collecting a filter cake and filtrate, drying the filter cake to obtain a hexachloroethane product and leading the filtrate into the evaporator for continuous circulation. The method is simple and adopts simple devices, additional solvents and raw materials are not needed, and the method has good environment-friendly benefit and social benefit.

Description

technical field [0001] The invention belongs to the field of chemistry, in particular to a method for recovering organic chlorides from rectification residues of methane chlorides or / and tetrachlorethylene. Background technique [0002] The existing production capacity of methane chloride and tetrachlorethylene in China is more than 2.5 million tons per year, and the rectification residue produced is more than 50,000 tons. These distillation residues contain a large amount of organic chlorides, and improper disposal will cause serious pollution to the environment and damage to human health. At present, the disposal of rectification residues in China is to treat the rectification residues as hazardous wastes to units with hazardous waste disposal qualifications, and the treatment method is generally incineration. Because these substances contain a large amount of chlorine, incineration will produce a large amount of hydrogen chloride gas and phosgene. In order not to pollute...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C19/04C07C19/041C07C19/043C07C21/12C07C17/38
Inventor 陈钢
Owner 山东中盛药化设备有限公司
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