Patents by Inventor Stephen R. Tennison

Stephen R. Tennison 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).

  • Patent number: 5622997
    Abstract: A moulded ion exchange resin structure suitable for use in reactive distillation is prepared by compressing particles of an ion exchange resin precursor having chemically reactive functional groups on their surfaces, into a preform having a predetermined shape, subsequently chemically bonding the particles together by reaction of the functional groups for example by acid-catalysed condensation and converting the precursor to an ion exchange resin, for example by sulphonation.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: April 22, 1997
    Assignees: BP Chemicals Limited, The British Petroleum Co., p.l.c.
    Inventors: Stephen R. Tennison, Richard H. Weatherhead
  • Patent number: 5571421
    Abstract: A process for separating components of a liquid mixture comprising a more adsorbable component (A), for example C.sub.1 to C.sub.
    Type: Grant
    Filed: July 19, 1994
    Date of Patent: November 5, 1996
    Assignee: BP Chemicals Limited & British Petroleum Co. P.L.C.
    Inventors: Stephen R. Tennison, Derrick J. Watson
  • Patent number: 5456868
    Abstract: A method of producing a form-stable sintered porous shaped phenolic resin article with continuous open pore structure and high macroporosity, in which a phenolic resin mixture is partially cured to a solid which is then comminuted to give a comminuted resin. The comminuted resin is admixed with water, hexamethylene tetramine and a cellulose ether, and the resulting comminuted resin mixture is formed into a shaped article which is allowed to come to equilibrium with air having a relative humidity of less than 100% at a temperature below 100.degree. C. The shaped article is then sintered to produce a form-stable sintered porous product.
    Type: Grant
    Filed: August 16, 1993
    Date of Patent: October 10, 1995
    Assignee: The British Petroleum Company p.l.c.
    Inventors: Anthony M. Lear, Stephen R. Tennison
  • Patent number: 4917835
    Abstract: Porous shaped phenolic resin articles are made by partially curing a phenolic resin to a solid, comminuting the resin, forming into a predetermined shape, and sintering. Porous shaped carbon articles are made by carbonizing the sintered material.
    Type: Grant
    Filed: February 4, 1988
    Date of Patent: April 17, 1990
    Assignee: The British Petroleum Company p.l.c.
    Inventors: Anthony M. Lear, Stephen R. Tennison, Paul W. Satchell
  • Patent number: 4600571
    Abstract: Catalysts as prepared by impregnating a carbon support with a halogen-containing compound of Ru, reducing the Ru to metal with hydrogen, and then depositing an alkali metal and a barium compound. The catalysts may be used for ammonia production.
    Type: Grant
    Filed: March 7, 1984
    Date of Patent: July 15, 1986
    Assignee: The British Petroleum Company p.l.c.
    Inventors: John J. McCarroll, Stephen R. Tennison, Nicholas P. Wilkinson
  • Patent number: 4510071
    Abstract: Methanol is converted to synthesis gas over a catalyst comprising Pd, an alkali metal, alkaline earth metal or a lanthanide on a carbon having defined surface area characteristics.
    Type: Grant
    Filed: August 1, 1984
    Date of Patent: April 9, 1985
    Assignee: The British Petroleum Company p.l.c.
    Inventors: Richard W. Joyner, John J. McCarroll, Stephen R. Tennison
  • Patent number: 4476250
    Abstract: Methanol is produced by passing CO and H.sub.2 over a supported Pd catalyst containing an alkali metal alkaline earth metal, or lanthanide promoter and supported on a carbon support with defined surface area characteristics.
    Type: Grant
    Filed: August 12, 1983
    Date of Patent: October 9, 1984
    Assignee: The British Petroleum Company p.l.c.
    Inventors: Richard W. Joyner, John J. McCarroll, Stephen R. Tennison
  • Patent number: 4271136
    Abstract: A process for the production of ammonia comprises passing hydrogen and nitrogen over a catalyst comprising a transition metal, e.g. ruthenium, and a modifying metal, e.g. an alkali metal, supported on a graphite-containing carbon support having specified surface area properties. At start-up the nitrogen is supplied in stoichiometric excess and thereafter in stoichiometric proportions.
    Type: Grant
    Filed: October 2, 1979
    Date of Patent: June 2, 1981
    Assignee: The British Petroleum Company Limited
    Inventor: Stephen R. Tennison
  • Patent number: 4250057
    Abstract: Catalyst for the synthesis of ammonia from hydrogen comprises (1) as support on graphite containing carbon having (a) a basal plane surface area of at least 100 m 2/G (b) a ratio of BET surface area to basal plane surface area of not more than 5:1 and (c) a ratio of basal plane surface area to edge surface area of at least 5:1 and (ii) as active component (a) 0.1 to 50% by weight of a transition metal and (b) 0.1 to 4 times by weight of (a) of a modifying metal or ion selected from the alkali or alkaline earth metals or ions. The modifying metal or ion is actively associated with the transition metal rather than the support.
    Type: Grant
    Filed: October 6, 1978
    Date of Patent: February 10, 1981
    Assignee: The British Petroleum Company Limited
    Inventors: Alan I. Foster, Peter G. James, John J. McCarroll, Stephen R. Tennison
  • Patent number: 4224192
    Abstract: A modified alumina catalyst support is prepared by mixing a Solution A containing alkali, a Solution B containing a salt of a modifying metal of Group 111A, other than aluminium, or V111 other than a platinum group metal, of the Periodic Table, and a Solution C containing a aluminium salt, to form a precipitate, ageing the precipitate, separating the precipitate from the supernatant liquor and calcining the precipitate. A platinum group metal may be added to the support and the resulting catalyst is suitable for catalyzing hydrocarbon conversation processes, particularly catalytic reforming.
    Type: Grant
    Filed: December 26, 1978
    Date of Patent: September 23, 1980
    Assignee: The British Petroleum Company Limited
    Inventors: Alan I. Foster, John J. McCarroll, Stephen R. Tennison
  • Patent number: 4163775
    Abstract: Catalyst for the synthesis of ammonia from hydrogen comprises (1) as support on graphite containing carbon having (a) a basal plane surface area of at least 100 m 2/G (b) a ratio of BET surface area to basal plane surface area of not more than 5:1 and (c) a ratio of basal plane surface area to edge surface area of at least 5:1 and (ii) as active component (a) 0.1 to 50% by weight of a transition metal and (b) 0.1 to 4 times by weight of (a) of a modifying metal or ion selected from the alkali or alkaline earth metals or ions. The modifying metal or ion is actively associated with the transition metal rather than the support.
    Type: Grant
    Filed: October 31, 1977
    Date of Patent: August 7, 1979
    Assignee: The British Petroleum Company Limited
    Inventors: Alan I. Foster, Peter G. James, John J. McCarroll, Stephen R. Tennison