Patents by Inventor Gert Tytgat

Gert Tytgat 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).

  • Crystallization processes for producing bisphenols
    Patent number: 7763757
    Abstract: Processes for producing bisphenols (e.g., bisphenol A (BPA)) having a purity greater than 99.7% are described, such processes including reacting a phenol and acetone in the presence of an acidic catalyst to form a product mixture comprising a bisphenol; removing at least a portion of the bisphenol from the product mixture in the form of a bisphenol/phenol adduct by crystallization, filtration and washing to provide bisphenol/phenol adduct crystals; and removing at least a portion of the phenol from the bisphenol/phenol adduct crystals to provide the bisphenol having a purity of more than 99.7%; wherein the crystallization comprises continuous suspension crystallization and is carried out in at least three crystallization devices arranged such that the product mixture is first cooled in a first stage of the crystallization to a temperature of 50 to 70° C.
    Type: Grant
    Filed: January 9, 2008
    Date of Patent: July 27, 2010
    Assignee: Bayer Material Science AG
    Inventors: Christian Münnich, Ulrich Blaschke, Rob Eek, Michael Prein, Raymond Audenaert, Gert Tytgat
  • CRYSTALLIZATION PROCESSES FOR PRODUCING BISPHENOLS
    Publication number: 20080200734
    Abstract: Processes for producing bisphenols (e.g., bisphenol A (BPA)) having a purity greater than 99.7% are described, such processes including reacting a phenol and acetone in the presence of an acidic catalyst to form a product mixture comprising a bisphenol; removing at least a portion of the bisphenol from the product mixture in the form of a bisphenol/phenol adduct by crystallization, filtration and washing to provide bisphenol/phenol adduct crystals; and removing at least a portion of the phenol from the bisphenol/phenol adduct crystals to provide the bisphenol having a purity of more than 99.7%; wherein the crystallization comprises continuous suspension crystallization and is carried out in at least three crystallization devices arranged such that the product mixture is first cooled in a first stage of the crystallization to a temperature of 50 to 70° C.
    Type: Application
    Filed: January 9, 2008
    Publication date: August 21, 2008
    Applicant: Bayer Material Science AG
    Inventors: Christian Munnich, Ulrich Blaschke, Rob Eek, Michael Prein, Raymond Audenaert, Gert Tytgat