Industrialized method for producing 2, 6-dichloro phenyl nitrile
A technology of dichlorobenzonitrile and a production method, which is applied in the directions of botanical equipment and methods, chemicals used for biological control, biocides, etc., can solve the complex process affecting use, dosage promotion, and treatment, and the production process is not easy to control. And other issues
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[0015] 1. Chlorination section: Add raw material 6-chloro-o-nitrotoluene, catalyst phosphorus pentachloride + pyridine into the chlorination kettle, heat up and control the temperature within the range of 100-220°C. After the target temperature is reached, chlorine gas is introduced. The chlorination temperature is controlled within 220°C, the chlorine flow rate is controlled between 10-80kg / hr, and the chlorination time is controlled within 24 hours. Chlorine reflux makes the content of the chlorinated solution reach the process index, that is, 60% of 2.6-dichlorobenzyl and 30% of 2.6-dichlorobenzonitrile are produced, and qualified raw materials are provided to the nitrile chemical section. The tail gas is absorbed by dilute acid to absorb HQ gas, and after neutralizing the excess chlorine gas, it is discharged up to the standard.
[0016] Feeding ratio: 500 kg of 6-chloronitrotoluene
[0017] Phosphorus pentachloride 3-15 kg
[0018] Pyridine 5-25 kg ...
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