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Chlorobenzene directional dual-catalytic chlorination method

A technology of chlorobenzene and catalyst, which is applied in the field of directional double catalytic chlorination of chlorobenzene, can solve the problems of high energy consumption rate, increased production cost, environmental pollution, etc., and achieve the effect of mature and reliable process and reduced emission

Pending Publication Date: 2020-12-25
江苏淮江科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, water washing and alkali washing will produce a large amount of waste water, which will affect product quality, cause corrosion to equipment and pipelines, and be difficult to handle, which not only increases production costs, but also may cause pollution to the environment and increase environmental treatment costs. At the same time, the traditional method uses intermittent classification. Chlorinated benzene is obtained by crystallization and centrifugation, and the energy consumption rate is high in the crystallization process, which increases the separation cost of chlorinated benzene

Method used

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  • Chlorobenzene directional dual-catalytic chlorination method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] First, put 30 parts of dry anhydrous benzene into the chlorination reactor, then add 1 part of copper sulfide, and when the temperature rises to 55 ° C, 7 parts of chlorine gas are introduced to react, and the flow rate of chlorine gas is 12ml / s, the stirring rate in the reactor was 55r / min, and the reaction time was 1h to obtain polychlorobenzene; then add 1 part of copper sulfide, and when the temperature rose to 320°C, the stirring rate in the reactor was 100r / min, and the reaction The time is 2 hours to obtain the chlorinated solution containing chlorinated benzene; the chlorinated solution containing chlorinated benzene obtained from the chlorination reactor is transferred to the washing tank, and the temperature of the water in the washing tank is 100°C before washing After 40min, the chlorinated solution after washing was transferred to the neutralization tank; 10 parts of 18% dilute ammonia water was added to the chlorinated solution transferred to the neutraliz...

Embodiment 2

[0027] First, put 40 parts of dry anhydrous benzene into the chlorination reactor, then add 1.5 parts of zinc sulfide, and when the temperature rises to 65°C, 10 parts of chlorine gas are introduced to react, and the flow rate of chlorine gas is 12ml / s, the stirring rate in the reactor is 58r / min, and the reaction time is 1.5h to obtain polychlorobenzene; then add 1 part of zinc sulfide, and when the temperature rises to 350°C, the stirring rate in the reactor is 130r / min, The reaction time is 3h, and the chlorinated liquid containing chlorinated benzene is obtained; the chlorinated liquid containing chlorinated benzene obtained from the chlorination reactor is transferred to the washing tank, and the temperature of the water in the washing tank is 150°C. Wash with water for 45min, and transfer the chlorinated solution after washing into the neutralization tank; add 20 parts of 20% dilute ammonia water into the chlorinated solution in the neutralization tank, and the stirring ...

Embodiment 3

[0029] First, put 50 parts of dry anhydrous benzene into the chlorination reactor, then add 3 parts of antimony sulfide, and when the temperature rises to 70°C, 17 parts of chlorine gas are fed into the reaction, and the flow rate of chlorine gas is 15ml / s, the stirring rate in the reactor was 80r / min, and the reaction time was 2h to obtain polychlorobenzene; then add 3 parts of antimony sulfide, when the temperature rose to 400°C, the stirring rate in the reactor was 150r / min, and the reaction The time is 3 hours to obtain the chlorinated liquid containing chlorinated benzene; transfer the chlorinated liquid containing chlorinated benzene obtained from the chlorination reactor into the washing tank, and wash with water after the temperature of the water in the washing tank is 200°C After 60 minutes, the chlorinated solution after washing was transferred to the neutralization tank; 30 parts of 15% dilute ammonia water was added to the chlorinated solution transferred to the ne...

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Abstract

The invention discloses a chlorobenzene directional dual-catalytic chlorination method, and relates to the technical field of organic chemical engineering. The product is prepared from the following raw materials in parts by weight: 30-50 parts of anhydrous benzene, 5-20 parts of chlorine and 1-5 parts of a catalyst, the production method is mature and reliable in process, reduces the emission oftoxic gas, is green, environment-friendly and pollution-free, and is more economical and practical due to the recycling of useful gas while meeting the green, environment-friendly and pollution-free requirements.

Description

technical field [0001] The invention belongs to the technical field of organic chemical industry, and in particular relates to a directional double-catalyzed chlorination method of chlorobenzene. Background technique [0002] Chlorobenzene, also called chlorobenzene, is a colorless, transparent, volatile liquid with a bitter almond smell. Melting point -45.6°C, boiling point 131.6°C, relative density 1.107 (20 / 4°C), refractive index 1.5248, flash point 23°C, autoignition point 637.78°C, flammable. The explosion limit in air is 1.83-9.23% (volume). Insoluble in water, easily soluble in alcohol, ether, benzene and chloroform, etc. Toxic, moderately toxic. [0003] Chlorinated benzene is an important basic organic synthesis raw material, used as dyes, medicines, pesticides, and organic synthesis intermediates. It is used in the manufacture of phenol, nitrochlorobenzene, dinitrochlorobenzene, aniline, nitrophenol and the pesticide DDT, etc. It is also used as a solvent for e...

Claims

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Application Information

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IPC IPC(8): C07C25/02C07C17/12C07C17/38C07C17/395C07C17/383
CPCC07C17/12C07C17/38C07C17/383C07C17/395C07C25/02
Inventor 沈正阳
Owner 江苏淮江科技有限公司