Patents by Inventor Isabel M. Gomes de Matos

Isabel M. Gomes de Matos 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 preparing bisphenol-A
    Patent number: 5210329
    Abstract: A process which comprises reacting phenol and acetone in the presence of an acidic catalyst and thereaftera. isolating first major portion of bisphenol-A, therefore forming a purge stream comprising bisphenol-A, bisphenol-A isomers and tar,b. adding or taking from the said purge stream, if necessary, sufficient phenol so as to bring the purge stream ratio of phenol to bisphenol-A to about 5:1 to 15:1 based on moles, thereby forming an altered purge stream,c. bringing the temperature of the altered stream to a range of about 30.degree.-50.degree. C.,d. maintaining the temperature of the altered stream at about 30.degree.-50.degree. C. until about 60-85% of the bisphenol-A crystallizes as a bisphenol-A/phenol 1:1 molar adduct,e. separating the adduct from its mother liquor.
    Type: Grant
    Filed: February 18, 1992
    Date of Patent: May 11, 1993
    Assignee: General Electric Company
    Inventors: Isabel M. Gomes de Matos, Allen Wai-Kee Ko
  • Process for crystallizing bisphenol-A
    Patent number: 4740635
    Abstract: A process for crystallizing bisphenol-A which comprises:a. adding water to a mixture comprising bisphenol-A, about 0.5 to 15 weight percent of diphenol isomers and impurities, said mixture essentially free of phenol,b. maintaining the combined water and said mixture of (a) at a temperature sufficient to melt the solid material of step (a),c. adiabatically cooling the water and said mixture to below about 90.degree. C., andd. separating crystalline bisphenol-A from the mother liquor.
    Type: Grant
    Filed: October 20, 1986
    Date of Patent: April 26, 1988
    Assignee: General Electric Company
    Inventors: Isabel M. Gomes de Matos, Gaylord M. Kissinger
  • Process for crystallizing bisphenol-A
    Patent number: 4740634
    Abstract: A process for crystallizing bisphenol-A which comprises:a. adding water to a mixture comprising bisphenol-A, about 0.5 to 15 weight percent of diphenol isomers and impurities, said mixture essentially free of phenol,b. maintaining the combined water and said mixture of (a) at a temperature sufficient to melt the solid material of step (a),c. adiabatically cooling the water and said mixture to below about 90.degree. C.,d. separating crystallized bisphenol-A from the mother liquor, ande. washing the crystallized bisphenol-A with an organic solvent which is at least substantially insoluble in water.
    Type: Grant
    Filed: October 20, 1986
    Date of Patent: April 26, 1988
    Assignee: General Electric Company
    Inventors: Isabel M. Gomes de Matos, Gaylord M. Kissinger
  • Process for removing phenols from water
    Patent number: 4720596
    Abstract: A process for removing phenol from water which comprises contacting a phenol bearing water stream with a bisphenol-A melt thereby separating phenol from the water.
    Type: Grant
    Filed: December 9, 1986
    Date of Patent: January 19, 1988
    Assignee: General Electric Company
    Inventors: Gaylord M. Kissinger, Isabel M. Gomes de Matos