Method for preparing acyl chloride by catalyzing phosgene and acid

Method for preparing acyl chloride by catalyzing phosgene and acid

  • CN 105,601,502 A
  • Filed: 03/08/2016
  • Published: 05/25/2016
  • Est. Priority Date: 03/08/2016
  • Status: Active Application
First Claim
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1. utilize catalysis phosgene and acid to prepare a method for acyl chlorides, it is characterized in that, comprise the following steps:

  • (1), taking carboxylic acid as raw material, add catalyst and solvent, the mass ratio that feeds intake of carboxylic acid and solvent is 0.1~

    30,Maintain at the temperature of 20 DEG C~

    200 DEG C, in reaction bulb, pass into phosgene, react;

    (2), the mol ratio that passes to carboxylic acid and phosgene is while reaching 1;

    1.0~

    1;

    10, stops logical phosgene, reactedAfter mixed liquor, reacted mixed liquor is filtered, the filtrate of gained is reduced pressure and is steamed solvent under rough vacuum,Then under condition of high vacuum degree, decompression distillation obtains acyl chlorides, and the filter cake of gained continues to repeat as the catalyst of step (1)Use.

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