System and method for acetic acid recovery during terephthalic acid production

System and method for acetic acid recovery during terephthalic acid production

  • CN 1,867,537 B
  • Filed: 08/12/2003
  • Issued: 06/05/2013
  • Est. Priority Date: 08/12/2003
  • Status: Active Grant
First Claim
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1. one kind is used for reclaiming the Distallation systm of acetic acid from water in the Production of Terephthalic Acid process, comprising:

  • Have entrainment agent for the dehydration tower of component distillation system, this dehydration tower comprises having 1.2kg/cm at least 2The top section of top pressure abs., this dehydration tower can be operated to receive the input feed streams that at least one comprises organic byproduct, acetic acid and water, this dehydration tower can be operated to isolate bottom stream and overhead vapor stream, wherein said bottom stream has than the higher acetic acid concentration of described at least one input feed streams, described overhead vapor stream contains described water and described organic byproduct and has than the lower acetic acid concentration of described at least one input feed streams, and this dehydration tower is worked under the pressure greater than environmental stress;

    Steam-generating installation, this steam-generating installation can be operated to give birth to from described overhead vapor miscarriage to have from 0.4kg/cm 2Abs. arrive 2.2kg/cm 2The low-pressure steam of pressure abs..

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