Industrialized method for producing 2, 6-dichloro phenyl nitrile
A technology of dichlorobenzonitrile and its production method, which is applied in the fields of botany equipment and methods, chemicals for biological control, biocides, etc., and can solve complex processing techniques, high production costs, impact on usage, promotion of dosage, etc. question
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[0014] 1. Chlorination section: Add raw material 6-chloro-o-nitrotoluene, catalyst phosphorus pentachloride and pyridine to the chlorination kettle, heat it up, and control the temperature in the range of 100-220℃. After reaching the target temperature, let in chlorine gas. The chlorination reaction temperature is controlled within 220°C, the chlorine flow rate is controlled between 10 and 80 kg / hr, and the chlorination time is controlled within 24 hours. Chlorine refluxing makes the content of the chlorinated solution reach the process index, that is, 60% of 2.6-dichlorodichlorobenzyl and 30% of 2.6-dichlorobenzonitrile are generated, and qualified raw materials are provided to the nitrile chemical section. The tail gas is absorbed by dilute acid, and then after the excess chlorine is neutralized, it will be discharged up to the standard.
[0015] Feeding ratio: 6-chloro-o-nitrotoluene 500 kg
[0016] Phosphorus pentachloride 3~15 kg
[0017] Pyridine 5~25kg
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