Method for converting carbon tetrachloride to ethylene tetrachloride

A technology of tetrachloroethylene and carbon tetrachloride, applied in chemical instruments and methods, organic chemistry, halogenated hydrocarbon preparation and other directions, can solve the problems of reducing the conversion amount of carbon tetrachloride, reducing the conversion amount of raw material carbon tetrachloride, etc.

Active Publication Date: 2013-09-18
SHANDONG DONGYUE FLUO SILICON MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The raw material mentioned in the Chinese patent CN101348414 adopts any one of monochloromethane, methane and natural gas and under the condition that chlorine exists, carbon tetrachloride generates the method for tetrachlorethylene through non-catalytic pyrolysis, but in the raw material of this method Contains monochloromethane and methane, it is easy to react with excess chlorine to regenerate carbon tetrachloride, which reduces the conversion of raw material carbon tetrachloride. Since natural gas is also a gas dominated by methane, it will also cause the conversion of raw material carbon tetrachloride reduction of
[0004] Disclosed in Chinese patent CN102816046 is a method that adopts monochloromethane or natural gas to react with excess chlorine and methane chloride to generate tetrachloroethylene. , trichloromethane), will also cause the reduction of the conversion of raw material carbon tetrachloride

Method used

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  • Method for converting carbon tetrachloride to ethylene tetrachloride
  • Method for converting carbon tetrachloride to ethylene tetrachloride

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Such as figure 1 Shown, the method that described carbon tetrachloride is converted into tetrachlorethylene is as follows:

[0023] (1) First introduce hydrogen and oxygen combined gas 3 and excess vaporized chlorine gas 4 into combustion zone II at the bottom of the reaction furnace for combustion, keep the temperature of the reaction furnace at a certain temperature and pressure, and then introduce superheated carbon tetrachloride steam 1 to obtain four Chlorinated carbon, chlorine, tetrachloroethylene and hydrogen chloride perchlorethylene mixture2;

[0024] The superheated carbon tetrachloride steam is sprayed into the reaction zone I of the reaction furnace by injection to generate pyrolysis reaction. The spray speed of the distributor on the upper part of the reaction furnace is 49m / s, and the temperature of the superheated carbon tetrachloride steam is 74°C.

[0025] The carbon tetrachloride flow that introduces reaction zone I depends on the chlorine amount tha...

Embodiment 2

[0058] Step and reaction process are as implementing example 1, and superheated carbon tetrachloride steam adopts injection mode to be sprayed into reaction furnace reaction zone I and pyrolysis reaction takes place, and reaction furnace upper part distributor injection speed is at 43m / s, and the temperature of superheated carbon tetrachloride steam is 85°C.

[0059] The test results are as follows:

[0060] Feed, kg / h

[0061] Hydrogen: 4.5kg

[0062] Oxygen: 0.5kg

[0063] Chlorine: 83.9kg

[0064] Carbon tetrachloride: 363.8kg

[0065] Hydrogen / chlorine / carbon tetrachloride / oxygen (molar ratio) 1:1.05:2.1:0.11

[0066] Reaction conditions:

[0067] Temperature, 607°C

[0068] Pressure, 0.46kg / cm 2 (Gauge)

[0069] reaction product:

[0070] Produced tetrachlorethylene, 186kg / h;

[0071] Carbon tetrachloride converted into tetrachlorethylene, 344.9kg / h;

[0072] Excess amount of chlorine, the mole percentage of chlorine in the exhaust gas of the reactor: 0.05

...

Embodiment 3

[0076] Step and reaction process are as implementing example 1, and superheated carbon tetrachloride steam adopts injection mode to spray into reaction furnace reaction zone I and pyrolysis reaction takes place, and reaction furnace upper part distributor jet velocity is at 54m / s, and the temperature of superheated carbon tetrachloride steam It is 96°C.

[0077] The test results are as follows:

[0078] Feed, kg / h

[0079] Hydrogen: 4.5kg

[0080] Oxygen: 0.9kg

[0081] Chlorine: 83.9kg

[0082] Carbon tetrachloride: 502.4kg

[0083] Hydrogen / chlorine / carbon tetrachloride / oxygen (molar ratio) 1:1.05:2.9:0.2

[0084] Reaction conditions:

[0085] Temperature, 618°C

[0086] Pressure, 0.76kg / cm 2 (Gauge)

[0087] reaction product:

[0088] Produced tetrachlorethylene, 256.4kg / h;

[0089] Carbon tetrachloride converted into tetrachlorethylene, 475.8kg / h;

[0090] Excess amount of chlorine, the mole percentage of chlorine in the exhaust gas of the reactor: 0.04

[...

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Abstract

The invention belongs to the technical field of ethylene tetrachloride preparation and in particular relates to a method for converting carbon tetrachloride to ethylene tetrachloride. The method is characterized in that carbon tetrachloride is subjected to non-catalytic pyrolysis to generate ethylene tetrachloride in the presence of a hydrogen, oxygen and hydrogen chloride combined gas and excessive chlorine. The method has the beneficial effects that new carbon tetrachloride is not generated in the reaction; the heat released in the reaction between hydrogen and chlorine is used in conversion from carbon tetrachloride to ethylene tetrachloride; and the conversion rate is 94-95%.

Description

technical field [0001] The invention belongs to the technical field of tetrachlorethylene preparation, and in particular relates to a method for converting carbon tetrachloride into tetrachlorethylene. Background technique [0002] Carbon tetrachloride is a halogenated hydrocarbon that destroys the ozone layer and is therefore an undesirable product. The main use of carbon tetrachloride has been as a raw material for the production of environmentally harmful fully halogenated chlorofluorocarbons, but due to the proven harmful effects of chlorofluorocarbons, the demand for carbon tetrachloride is gradually decreasing and is being Strict control of the world and China's environmental protection departments. On the other hand, as a solvent and a raw material for the production of other chemical products, perchlorethylene is not harmful to the environment, and thus the demand for perchlorethylene is expected to maintain and grow. [0003] The raw material mentioned in the Chin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C21/12C07C17/26
Inventor 魏军海张秀伸
Owner SHANDONG DONGYUE FLUO SILICON MATERIALS CO LTD
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