Patents by Inventor Mohammad Akhtar Zahoor

Mohammad Akhtar Zahoor 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).

  • Catalyst and process for ethylene oligomerization
    Patent number: 6184428
    Abstract: A catalyst and a process are provided for oligomerizing ethylene. A heterogeneous catalyst system comprises: (1) a chelating ligand, preferably 2-diphenyl phosphino benzoic acid (DPPBA); (2) a nickel precursor, preferably nickel chloride hexahydrate (NiCl2.6H2O); (3) a catalyst activator, preferably sodium tetraphenylborate (NaBPh4); and (4) silica. A 1:1:1 molar ratio of Ni:DPPBA:BPh4 catalyst components are fixed on a silica support using low-temperature fixation. The catalyst components are dispersed in a diluent, preferably ethanol, and silica is added. The ethanol is evaporated using freeze-drying equipment to form a silica-supported catalyst system. The silica-supported catalyst is slurried in ethanol in a reactor, and ethylene is added. The reactor pressure and temperature are maintained at about 725 psig and 100° C., respectively, for about two hours.
    Type: Grant
    Filed: February 17, 1999
    Date of Patent: February 6, 2001
    Assignee: Saudi Basic Industries Corporation
    Inventors: Mohammad Akhtar Zahoor, Fahad Al-Sherehy, Olagoke Olabisi, Mohammed M. Abdillahi, Mian Rahat Saeed