Patents by Inventor Rabaab Tahir

Rabaab Tahir 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).

  • Restructuring of olefins
    Patent number: 5434328
    Abstract: This invention relates to a process for restructuring an olefinic feedstock rich in linear olefins into a product olefin of narrower composition which is richer in branched olefins than the starting feedstock. Such restructuring is achieved by contacting the feedstock with an unmodified or partially modified tectometallosilicate of the Theta-1 type at relatively low temperatures. The product olefins are valuable as petrochemical feedstock for producing polyolefins, alcohols, ethers and other oxygenates, surfactants, alkyl aromatics and oligomers useful as gasoline blending components.
    Type: Grant
    Filed: April 30, 1987
    Date of Patent: July 18, 1995
    Assignee: The British Petroleum Company p.l.c.
    Inventors: Sami A. I. Barri, Rabaab Tahir, David W. Walker
  • Chemical process and catalyst
    Patent number: 5208201
    Abstract: A catalyst which comprises zinc, together with an effective amount of a platinum group metal on a support which is a material having the silicalite structure, the framework of said material consisting essentially of silicon and oxygen atoms or of silicon, zinc and oxygen atoms. There is also provided a process for the dehydrogenation of a C.sub.2 to C.sub.10 paraffin to yield an alkene product which process comprises contacting the paraffin under dehydrogenation conditions with a catalyst according to the invention.
    Type: Grant
    Filed: December 16, 1991
    Date of Patent: May 4, 1993
    Assignee: The British Petroleum Company p.l.c.
    Inventors: Sami A. I. Barri, Rabaab Tahir
  • Process for dehydrogenation of C.sub.2 -C.sub.10 paraffin to yield alkene product
    Patent number: 5126502
    Abstract: A catalyst which comprises zinc, together with an effective amount of a platinum group metal on a support which is a material having the silicalite structure, the framework of said material consisting essentially of silicon and oxygen atoms or of silicon, zinc and oxygen atoms. There is also provided a process for the dehydrogenation of a C.sub.2 to C.sub.10 paraffin to yield an alkene product which process comprises contacting the paraffin under dehydrogenation conditions with a catalyst according to the invention.
    Type: Grant
    Filed: July 11, 1989
    Date of Patent: June 30, 1992
    Assignee: British Petroleum Company p.l.c.
    Inventors: Sami A. I. Barri, Rabaab Tahir
  • Chemical process and catalyst
    Patent number: 5118653
    Abstract: A catalyst which is substantially free of alkali and alkaline earth metals and comprises an effective amount of a platinum group metal on a silicalite support; characterised in that the catalyst also comprises tin. There is also provided a process for the dehydrogenation of a C.sub.2 to C.sub.10 paraffin to yield an alkene product, which comprises contacting the paraffin under dehydrogenation conditions with a catalyst according to the invention.
    Type: Grant
    Filed: May 22, 1990
    Date of Patent: June 2, 1992
    Assignee: The British Petroleum Company, p.l.c.
    Inventors: Sami A. I. Barri, Rabaab Tahir
  • Chemical process and catalyst
    Patent number: 4982047
    Abstract: A catalyst which is substantially free of alkali and alkaline earth metals and comprises an effective amount of a platinum group metal on a silicalite support; characterized in that the catalyst also comprises tin. There is also provided a process for the dehydrogenation of a C.sub.2 to C.sub.10 paraffin to yield an alkene product, which comprises contacting the paraffin under dehydrogenation conditions with a catalyst according to the invention.
    Type: Grant
    Filed: June 23, 1989
    Date of Patent: January 1, 1991
    Assignee: The British Petroleum Company, p.l.c.
    Inventors: Sami A. I. Barri, Rabaab Tahir