Process for the purification of a liquid feed comprising mca and dca

Process for the purification of a liquid feed comprising mca and dca

CN
  • CN 103,687,840 A
  • Filed: 10/17/2012
  • Published: 03/26/2014
  • Est. Priority Date: 10/20/2011
  • Status: Active Grant
First Claim
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1. a method for the liquid feeding that does not basically contain water that purifying comprises Monochloro Acetic Acid, dichloro acetic acid, optional acyl chlorides, optional acid anhydride and optional acetic acid, it comprises the steps:

  • (a) water is added in liquid feeding, it is the liquid feeding of 0.01-5 % by weight water that acquisition is comprised based on liquid feeding gross weight, and(b) make subsequently the liquid feeding of acquisition in step (a) stand catalytic hydrogenation and dechlorination step, by making it contact dichloro acetic acid is changed into Monochloro Acetic Acid and carry out under the solid heterogeneous hydrogenation catalyst that comprises the metal that is deposited on one or more periodic table of elements group VIIIs on carrier exists with hydrogen source.

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