Patents by Inventor Jihad Dakka

Jihad Dakka 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 oligomerization of olefins
    Publication number: 20050014630
    Abstract: Sulphur-containing olefinic feedstocks are oligomerized over zeolite catalysts.
    Type: Application
    Filed: October 23, 2002
    Publication date: January 20, 2005
    Inventors: Jihad Dakka, Hans Goris, Georges Mathys, Roger Eijkhoudt, Marc Puttemans, Stephen Brown
  • Crystalline molecular sieves
    Publication number: 20050013774
    Abstract: MFS structure type zeolite manufacture is facilitated by using a second organic molecule in addition to the usual hexaethylpentane diammonium salt.
    Type: Application
    Filed: September 27, 2002
    Publication date: January 20, 2005
    Inventors: Jihad Dakka, Machteld Mertens, Daria Lissy
  • Process for the manufacture of benzoic acid and salts thereof
    Patent number: 4965406
    Abstract: A process for the manufacture of benzoic acid is described. The process is based on the reaction of toluene in a liquid phase oxidation with an oxygen containing gas in the presence of a phase-transfer catalyst (a), a transition metal salt (b) and traces of a polar solvent, such as water, the molar ratio between (a) and (b) being in the range of between 0.25:1 to 1.5:1. The phase-transfer catalyst is selected from quaternary ammonium and phosphonium salts having a total carbon atoms in the range of 17 to 58, the anion bound thereto being selected from Br.sup.-, F.sup.-, Cl.sup.-, OH.sup.-, CH.sub.3 COO.sup.- or HSO.sub.4.sup.-. The benzoic acid produced is characterized by its very high purity and high conversion reaching generally values of above 95%.
    Type: Grant
    Filed: July 20, 1989
    Date of Patent: October 23, 1990
    Assignees: Gadot Petrochemical Industries, Inc., Yissum Research Development Company of the Hebrew University of Jerusalem
    Inventors: Jihad Dakka, Zoran Amikam, Yoel Sasson
  • Process for the manufacture of aromatic dicarboxylic acids and derivatives thereof
    Patent number: 4853479
    Abstract: An improved process for the manufacture of aromatic dicarboxylic acids and derivatives thereof is described. The process is based on the reaction of a corresponding aromatic hydrocarbon in a liquid phase oxidation with an oxygen-containing gas in the presence of a phase-transfer catalyst (a) a transition metal salt (b) and traces of a polar solvent, such as water, the molar ratio between (a) and (b) being in the range of between 0.25:1 to 1.5:1. The phase-transfer catalyst is selected from the quaternary ammonium and phosphonium salts having a total carbon atoms in the range of 17 to 58, the anion bound thereto being selected from Br.sup.-, F.sup.-, Cl.sup.-, OH.sup.-, CH.sub.3 COO.sup.- and HSO.sub.4. Among the aromatic dicarboxylic acids and derivatives thereof the following are mentioned: terephthalic acid; isophthalic acid and methyl terephthalate. The process is characterized by the very high conversion of the respective aromatic hydrocarbon reaching even 100%.
    Type: Grant
    Filed: November 3, 1988
    Date of Patent: August 1, 1989
    Assignees: Gadot Petrochemical Industries, Ltd., Yissum R & D Company of the Hebrew University of Jerusalem
    Inventors: Jihad Dakka, Amikam Zoran, Yoel Sasson