Method and apparatus for making acetic acid with improved productivity

Method and apparatus for making acetic acid with improved productivity

  • CN 101,855,194 B
  • Filed: 09/24/2008
  • Issued: 06/17/2015
  • Est. Priority Date: 10/11/2007
  • Status: Active Grant
First Claim
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1. produce the carbonylation method of acetic acid, comprising:

  • (a) in the reactor, carbonylation methanol or its reactive derivatives under the catalyzer of water, selected from rhodium catalyzer, iridium catalyst and composition thereof and methyl iodide promotor exist thus form acetic acidreaction mixture;

    Liquid circulation logistics and the first thick product stream is separated in (b) feeding part reaction mixture to flasher and by the logistics of described acetic acidreaction mixture;

    C the first thick product stream described in () charging is to light fraction tower and be circulated back in described reactor by liquid circulation logistics;

    D () is distilled described thick product stream in a distillation column thus is removed low component of boiling as the column overhead stream from described distillation tower, produce the first purified product stream of removing from described distillation tower as liquid effluent and as liquid residue logistics from the high component of boiling of described base product removingWherein said liquid residue logistics forms primarily of acetic acid;

    (e) gasify in the second flasher described liquid residue logistics at least partially thus provide the second product stream primarily of acetic acid composition to reclaim acetic acid further from process, and from the second flasher, resistates is circulated back to described reactor;

    WithF () is to the second product stream described in the feeding of downstream.

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