Study on the Synthesis Process of 2,3-Dichloropyridine
The 2,3-dichloropyridine was synthesized by using the 2,3,6-trichloropyridine as raw material in fixed bed re-actor.The influence of metal type,metal content,residence temperature,pressure and airspeed were systematically investi-gated,and suitable reaction conditions were selected.The optimal conditions for diazotization were as follows:metal type was Pd,metal content was 4％,the temperature was 80℃,the pressure was 0.6 MPa and the airspeed was 0.4 h-1,the yield of 2,3-dichloropyridine was the highest,at 94.1％,respectively.The process realizes the continuous synthesis of 2,3-di-chloropyridine has high safety and high yield,and is suitable for industrial production.
DBU modified M/MCM-412,3,6-trichloropyridinereduction reactionfixed bed reactor2,3-dichloropyri-dine
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