×

Process for production of a carboxylic acid/diol mixture suitable for use in polyester production

  • US 20050159617A1
  • Filed: 03/10/2005
  • Published: 07/21/2005
  • Est. Priority Date: 01/15/2004
  • Status: Active Grant
First Claim
Patent Images

1. A process for producing a carboxylic acid/diol mixture, said process comprising:

  • (a) removing in a liquor exchange zone impurities from a carboxylic acid slurry to form a water-wet carboxylic acid cake, a mother liquor stream, a solvent mother liquor stream, and a solvent/water byproduct liquor stream;

    wherein said liquor exchange zone comprises at least one solid liquid separation device operated at a temperature of 50°

    C. to 200°

    C.;

    (b) routing said water-wet carboxylic acid cake to a vapor seal zone; and

    (c) adding at least one diol to said water-wet carboxylic acid cake in a carboxylic acid/diol mixing zone to form said carboxylic acid/diol mixture.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×