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Production device for preparing 2, 6-dichlorobenzonitrile

A production device, the technology of dichlorobenzonitrile, applied in the direction of nitrogen oxide-organic compound reaction preparation, organic chemistry, etc., can solve the problems of not being able to meet the market demand, difficult production control, low output, etc., to achieve reasonable design of production equipment, The effect of reducing the generation of solid waste and reducing the consumption of raw materials

Active Publication Date: 2014-09-17
永椿化工新材料有限公司
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  • Abstract
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Problems solved by technology

[0003] Existing 2,6-dichlorobenzonitrile synthesis methods include toluene direct chlorination method, p-nitrotoluene method, o-nitrotoluene method, p-tert-butyltoluene method, o-toluenesulfonyl chloride chlorination decomposition method, etc., but the above The defects in the production of various 2,6-dichlorobenzonitriles are: difficult production control, low output, high cost, and cannot meet the market demand

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  • Production device for preparing 2, 6-dichlorobenzonitrile

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Embodiment Construction

[0012] The present invention is provided with evaporator 1, buffer tank 2, hydrogen chloride recovery tank 3, chlorination kettle 4, first rectification kettle 5, hydrolysis nitrilation kettle 6, second rectification kettle 7, drying machine 8, the first condenser device 9, second condenser 10 and rectification column 11.

[0013] A light source is arranged in the chlorination kettle 4, and the evaporator 1 is connected to a feed port of the chlorination kettle 4 through a buffer tank 2, and a 2,6-dichlorotoluene feed inlet and phosphorus pentachloride are also respectively arranged on the chlorination kettle 4. The feed port and the jacket of the chlorination kettle 4 are connected to the first condenser 9 to control the temperature of the material in the chlorination kettle 4 .

[0014] The inlet end of the hydrogen chloride recovery tank 3 is connected with the gas outlet that is arranged on the top of the chlorination kettle 4 .

[0015] The discharge port at the lower to...

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Abstract

The invention discloses a production device for preparing 2, 6-dichlorobenzonitrile, and relates to the technical field of production of chemically synthesized 2, 6-dichlorobenzonitrile. The production device comprises an evaporator, a buffer tank, a hydrogen chloride recycling tank, a chlorination kettle, a first rectifying still and a hydrolysis quaternizing kettle. The production device is reasonable in design, convenient to control, less in raw material consumption and low in production cost, solid waste is decreased, emission of nitrogenous nitroso-group waste gas is reduced, and the production device is an energy-saving, emission-reduction and environment-friendly industrial practical cleaning production technique.

Description

technical field [0001] The invention relates to the production technical field of chemically synthesizing 2,6-dichlorobenzonitrile. Background technique [0002] 2,6-Dichlorobenzonitrile is a synthetic intermediate of benzoylurea, a broad-spectrum new pesticide with high efficiency and low toxicity. The pesticide formed has the characteristics of high efficiency, low toxicity, no residue, and no harm to crops. It can be used to produce pesticides , herbicides, and can also be used in the production of dyes, medicines, pesticides and special polymer materials. [0003] Existing 2,6-dichlorobenzonitrile synthesis methods include toluene direct chlorination method, p-nitrotoluene method, o-nitrotoluene method, p-tert-butyltoluene method, o-toluenesulfonyl chloride chlorination decomposition method, etc., but the above The defects in the production of various 2,6-dichlorobenzonitriles are: difficult production control, low output, high cost, and cannot meet the market demand. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C255/50C07C253/02
Inventor 陈国云王瑛王晨潘明生刘润兴王正军余辉罗瑞
Owner 永椿化工新材料有限公司
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