Patents by Inventor John R. Molinaro

John R. Molinaro 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).

  • Photochlorination of phthalic anhydride
    Patent number: 5300201
    Abstract: Phthalic anhydride can be photochlorinated in the vapor phase to give good yields of 4-chlorophthalic anhydride at temperatures of 250.degree. to 400.degree. C. Optionally, the process can be run to produce di, tri, and tetrachlorophthalic anhydrides.
    Type: Grant
    Filed: April 22, 1991
    Date of Patent: April 5, 1994
    Assignee: Occidental Chemical Corporation
    Inventors: Karl W. Seper, John R. Molinaro
  • Process for the preparation and recovery of oxydiphthalic anhydrides
    Patent number: 5021168
    Abstract: Oxydiphthalic anhydrides of the formula ##STR1## are prepared by reacting a halophthalic anhydride with potassium carbonate in:(1) a solvent-free reaction medium wherein the molar ratio of halophthalic anhydride:potassium carbonate is greater than 2:1; or(2) a high boiling solvent which improves the mixing of the components, and aids in subsequent purification of the product. The molar ratio of halophthalic anhydride to potassium carbonate is about 1.5:1 or greater.The oxydiphthalic anhydride can be purified by filtering or centrifuging a hot solution of the oxydiphthalic anhydride in a high boiling solvent to remove impurities, followed by cooling the solution to precipitate the oxydiphthalic anhydride, which can be removed from the solution by filtration or centrifuging.
    Type: Grant
    Filed: July 18, 1989
    Date of Patent: June 4, 1991
    Assignee: Occidental Chemical Corporation
    Inventors: John R. Molinaro, Joseph A. Pawlak, Willis T. Schwartz
  • Process for the preparation and recovery of oxdiphthalic anhydrides
    Patent number: 4870194
    Abstract: Oxydiphthalic anhydrides of the formula ##STR1## are prepared by reacting a halophthalic anhydride with potassium carbonate in:(1) a solvent-free reaction medium wherein the molar ratio of halophthalic anhydride:potassium carbonate is greater than 2:1; or(2) a high boiling solvent which improves the mixing of the components, and aids in subsequent purification of the product. The molar ratio of halophthalic anhydride to potassium carbonate is about 1.5:1 or greater.The oxydiphthalic anhydride can be purified by filtering or centrifuging a hot solution of the oxydiphthalic anhydride in a high boiling solvent to remove impurities, followed by cooling the solution to precipitate the oxydiphthalic anhydride, which can be removed from the solution by filtration or centrifuging.
    Type: Grant
    Filed: February 24, 1988
    Date of Patent: September 26, 1989
    Assignee: Occidental Chemical Corporation
    Inventors: John R. Molinaro, Joseph A. Pawlak, Willis T. Schwartz