Patents by Inventor Steinar Kvisle

Steinar Kvisle 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).

  • Microporous crystalline silico-alumino-phosphate composition, catalytic material comprising said composition and use of these for production of olefins from methanol
    Patent number: 6334994
    Abstract: Microporous crystalline silico-alumino-phosphate (SAPO) compositions, catalytic materials comprising the composition, and use of these for production of olefins from methanol. The catalysts contain silico-alumino-phosphate materials with AEI/CHA-mixed phase composition. The catalysts have prolonged life compared to those belonging to the prior art.
    Type: Grant
    Filed: June 10, 1999
    Date of Patent: January 1, 2002
    Assignee: Norsk Hydro ASA
    Inventors: Rune Wendelbo, Duncan E. Akporiaye, Anne Andersen, Martin Ivar Dahl, Helle Brit Mostad, Terje Fuglerud, Steinar Kvisle
  • Procedure for synthesis of crystalline microporous silico-alumino-phosphates
    Patent number: 5663471
    Abstract: A process for producing crystalline microporous silico-alumino-phosphates with controlled Si content from a mixture of reactive sources of SiO.sub.2, Al.sub.2 O.sub.3 and P.sub.2 O.sub.5 and an organic template material, by combining at least a portion of the Al source and the P source in the absence of the Si source, mixing the resulting mixture with any remaining Al source, the Si source and the organic template material to obtain a gel, and heating the gel to obtain crystallization, wherein the Al and Si sources in the reaction mixture are mixed in the same mole ratios as in the crystalline microporous silica-alumino-phosphate to be produced, the P source is added in stoichiometric excess and hydrochloric acid is added at the same time as the P source, in a quantity such that the ratio of silica to hydrochloric acid in the gel is kept between 0.3 and 3.
    Type: Grant
    Filed: August 25, 1994
    Date of Patent: September 2, 1997
    Assignee: Norsk Hydro a.s.
    Inventors: Steinar Kvisle, Rune Wendelbo, Hanne ren
  • Process for the preparation of a dehydrogenation catalyst
    Patent number: 5017543
    Abstract: A process is described for the catalytic dehydrogenation of paraffinic hydrocarbons preferably having from 3 to 6 carbon atoms in the presence of a catalyst containing at least one metal of the platinum group, a co-catalyst and a promoter, the noble metal of the platinum group being deposited into the alumina support in two steps, the first one being followed by a calcination and a reduction, the second one being followed by a calcination.
    Type: Grant
    Filed: May 3, 1990
    Date of Patent: May 21, 1991
    Assignee: Labofina, S.A.
    Inventors: Georges E. M. J. De Clippeleir, Elizabeth Baumann Ofstad, Steinar Kvisle
  • Process and catalyst for the catalytic dehydrogenation of hydrocarbons
    Patent number: 4962265
    Abstract: A process is described for the catalytic dehydrogenation of paraffinic hydrocarbons preferably having from 3 to 6 carbon atoms in the presence of a catalyst containing at least one metal of the platinum group, a co-catalyst and a promoter, the noble metal of the platinum group being deposited into the alumina support in two steps, the first one being followed by a calcination and a reduction, the second one being followed by a calcination.
    Type: Grant
    Filed: February 13, 1989
    Date of Patent: October 9, 1990
    Assignee: Labofina, S.A.
    Inventors: Georges E. M. J. De Clippeleir, Elizabeth B. Ofstad, Steinar Kvisle