Patents by Inventor Alan M. Ure

Alan M. Ure has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for the production of terephthalic acid
    Patent number: 5563293
    Abstract: A terephthalic acid slurry in acetic acid is produced by oxidizing p-xylene in acetic acid, removing water by evaporation of a stream of water and acetic acid, and returning acetic acid to the oxidation step. The terephthalic acid is separated from the reaction medium in a first zone to leave a deposit on a band, the deposit is washed with a first aqueous medium in a second zone, removed from the band in a third zone, and admixed with a second aqueous medium. Reaction medium is passed from the first zone to the oxidation step and terephthalic acid is recovered, preferably after further purification.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: October 8, 1996
    Assignee: Imperial Chemical Industries PLC
    Inventors: Eric Hindmarsh, John A. Turner, Alan M. Ure
  • Process for the production of terephthalic acid
    Patent number: 5527957
    Abstract: A terephthalic acid slurry in acetic acid is produced by oxidizing p-xylene in acetic acid, removing water by evaporation of a stream of water and acetic acid, and returning acetic acid to the oxidation step. The terephthalic acid is separated from the reaction medium in a first zone to leave a deposit on a band, the deposit is washed with a first aqueous medium in a second zone, removed from the band in a third zone, and admixed with a second aqueous medium. Reaction medium is passed from the first zone to the oxidation step and terephthalic acid is recovered, preferably after further purification.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: June 18, 1996
    Assignee: Imperial Chemical Industries PLC
    Inventors: Eric Hindmarsh, John A. Turner, Alan M. Ure