Method for reducing carbon tetrachloride generation in methane chloride production course by heat chlorination method

A technology of methane chloride and carbon tetrachloride, which is applied in chemical instruments and methods, organic chemistry, preparation of halogenated hydrocarbons, etc., can solve problems such as unclear market prospects of tetrachlorethylene, long construction period of equipment, and large investment of equipment , to achieve the effect of small investment, simple equipment modification and simple processing technology

Inactive Publication Date: 2008-09-24
SHANDONG DONGYUE FLUO SILICON MATERIALS CO LTD
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  • Application Information

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Problems solved by technology

[0003] Many domestic manufacturers plan to introduce carbon tetrachloride to tetrachlorethylene conversion technology, but the cost of introducing technology is high, the market prospect of tetrachlorethylene is not clear, and the investment in the device is large, and the construction period of the device is long, so in tetrachloride When there is no good treatment method for carbon, it is a better way to reduce the production of carbon tetrachloride by increasing equipment
At present, there is no relatively mature technology in China

Method used

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  • Method for reducing carbon tetrachloride generation in methane chloride production course by heat chlorination method

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Effect test

Embodiment 1

[0019] Embodiment 1: increase one carbon tetrachloride vaporizer (1), carbon tetrachloride superheater (2) and monochloromethane superheater (7) can share one, in normal production process (CH 3 Cl flow 150Nm 3 / h), the carbon tetrachloride is regulated (7.5Nm 3 / h) enter the reactor to participate in the reaction, the reaction temperature is 400 ° C, the residence time is 10 seconds, the reaction is cooled and analyzed after sampling, and the conversion rate of carbon tetrachloride is more than 95%.

Embodiment 2

[0020] Embodiment 2: increase carbon tetrachloride vaporizer (1), each one of carbon tetrachloride superheater (2) in normal production process (CH 3 Cl flow 300Nm 3 / h), carbon tetrachloride is regulated (30Nm 3 / h) enter the superheater to overheat to 270°C, enter the reactor to participate in the reaction, the reaction temperature is 450°C, the residence time is 5 seconds, the reaction is cooled and the sample is analyzed, and the conversion rate of carbon tetrachloride is more than 98%.

Embodiment 3

[0021] Embodiment 3: increase carbon tetrachloride vaporizer (1), each one of carbon tetrachloride superheater (2) in normal production process (CH 3 Cl flow 300Nm 3 / h), carbon tetrachloride is regulated (3Nm 3 / h) enter the superheater to overheat to 270°C, enter the reactor to participate in the reaction, the reaction temperature is 430°C, the residence time is 5 seconds, the reaction is cooled and the sample is analyzed, and the conversion rate of carbon tetrachloride is more than 90%.

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Abstract

This invention discloses method of reducing generated carbon tetrachloride in high temperature heat chlorination process methane chloride equipment. A set of carbon tetrachloride vaporization system is added in existing heat chlorination reaction, after it is evaporated, it is sent into heat chlorination reactor with methane chloride and chlorine to reach the goal of restraining carbon tetrachloride content in product. Reaction temperature is 400-500 degrees centigrade, reaction pressure is 0.6-1.0MPa, and carbon tetrachloride sending content is 1-10 percent.

Description

Technical field: [0001] The invention belongs to a method for reducing the output of industrial harmful by-products, in particular to a treatment method for methane chloride by-product carbon tetrachloride. Background technique: [0002] Carbon tetrachloride (CTC) is a by-product in the production process of methane chloride. Since carbon tetrachloride enters the atmospheric stratosphere and has a strong destructive effect on the ozone layer, in order to protect the ozone layer, the international community formulated the " The Montreal Protocol on Substances that Deplete the Ozone Layer stipulates that after 1996, the production and use of CTC in developed countries is limited to those occasions that have been destroyed or transformed, and the production is banned globally in 2010. Our country promises to the international community to gradually reduce and phase out the production and use of ozone-depleting substances such as carbon tetrachloride. Therefore, for enterprises...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C19/03C07C17/00
Inventor 伊港刘强
Owner SHANDONG DONGYUE FLUO SILICON MATERIALS CO LTD
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