Patents by Inventor Nabil Rizkalla

Nabil Rizkalla 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 carboxylic acid anhydrides
    Patent number: 4002677
    Abstract: A carboxylic acid anhydride such as acetic anhydride, is prepared from a carboxylate ester or a hydrocarbyl ether in carbonylation processes comprising the use of an iodide, carbon monoxide and a nickel-chromium catalyst in the presence of a tin promoter.
    Type: Grant
    Filed: December 22, 1975
    Date of Patent: January 11, 1977
    Assignee: Halcon International, Inc.
    Inventors: Anthony N. Naglieri, Nabil Rizkalla
  • Preparation of carboxylic acid anhydrides
    Patent number: 4002678
    Abstract: A carboxylic acid anhydride, such as acetic anhydride, is prepared from a carboxylate ester or a hydrocarbyl ether in carbonylation processes comprising the use of an iodide, carbon monoxide and a nickel-chromium catalyst in the presence of a promoter comprising an organo-nitrogen compound or an organo-phosphorus compound wherein the nitrogen and phosphorus are trivalent.
    Type: Grant
    Filed: December 22, 1975
    Date of Patent: January 11, 1977
    Assignee: Halcon International, Inc.
    Inventors: Anthony N. Naglieri, Nabil Rizkalla