Method for purifying (meth)acrylic acid

Method for purifying (meth)acrylic acid

  • CN 1,582,268 A
  • Filed: 10/30/2002
  • Published: 02/16/2005
  • Est. Priority Date: 10/30/2001
  • Status: Active Application
First Claim
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1. method, this method is thick (methyl) the acrylic acid process for purification that adopts the catalytic gas phase oxidation method to obtain, it is characterized in that, in the 1st distillation tower of the refining system that 3 distillation towers to the 1st~

  • the 3rd constitute, supply has been removed thick (methyl) vinylformic acid of most of water and acetic acid and has been distilled, the overhead product of the 1st distillation tower supplied with the 2nd distillation tower and distill and this overhead product is reclaimed as highly purified (methyl) acrylic products, liquid at the bottom of the tower of the 1st distillation tower and the 2nd distillation tower is supplied with the 3rd distillation tower and distill and this overhead product is supplied with the 1st distillation tower.

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