Process for producing acetic acid

CAFC
  • US 9,006,483 B2
  • Filed: 03/12/2013
  • Issued: 04/14/2015
  • Est. Priority Date: 03/14/2012
  • Status: Active Grant
First Claim
Patent Images

1. A process for producing acetic acid, comprising:

  • distilling a mixture containing hydrogen iodide, water, methyl iodide, acetic acid, and methyl acetate to form an overhead containing a lower boiling point component, andcondensing the overhead to form separated liquid phases,wherein the mixture contains an effective amount of water in a concentration of not more than 5% by weight and methyl acetate in a concentration of 0.5 to 9% by weight, and is separated, in the distillation step, into the overhead containing methyl iodide and a side cut stream or bottom stream containing acetic acid.

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