Patents by Inventor Pierre E. Dejaifve

Pierre E. Dejaifve 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 removing hydrogen from the presence of organic compounds
    Patent number: 5124500
    Abstract: A process for the removal of hydrogen from a mixture of hydrogen and one or more organic compounds, which comprises contacting the mixture with a molecular sieve containing a reducible metal cation, said molecular sieve being selectively permeable to hydrogen.
    Type: Grant
    Filed: July 31, 1990
    Date of Patent: June 23, 1992
    Assignee: Shell Oil Company
    Inventors: David M. Clark, Pierre E. Dejaifve, Christopher S. John, Jaydeep Biswas, Ian E. Maxwell
  • Catalyst for dehydrogenating organic compounds, a process for its preparation and its use
    Patent number: 4975407
    Abstract: Dehydrogenation catalyst, wherein the molar ratio between iron oxide providing agent and potassium oxide providing agent calculated as iron: potassium atomic ratio is in the range of from 1.5 to 60, a K.sub.2 Fe.sub.12 O.sub.19 phase is present in an octahedral Fe.sub.3 O.sub.4 matrix, showing crystalline epitaxy between the hexagonal structure of K.sub.2 Fe.sub.12 O.sub.19 and the (111) planes of the Fe.sub.3 O.sub.4 spinel structure, and showing intense X-ray diffraction peaks in the area of from d=12.4 .ANG. to d=1.60 .ANG..Process for the preparation of such catalyst and process for dehydrogenation of optionally substituted alkanes into olefins.
    Type: Grant
    Filed: April 26, 1989
    Date of Patent: December 4, 1990
    Assignee: Shell Oil Company
    Inventors: Pierre E. Dejaifve, Roland A. C. Garin, Jean-Claude Lambert, Jean-Paul Darnanville, Jean-Claude Clement
  • Dehydrogenation catalyst
    Patent number: 4857498
    Abstract: 1 to 25% by weight of an alkali metal compound, calculated as stable alkali metal oxide,0.5 to 20% by weight of a rare earth metal compound, calculated as the oxide,0.5 to 10% by weight of a calcium compound, calculated as CaO,0.5 to 10% by weight of a germanium-, tin- and/or lead compound, calculated as the dioxide, and35 to 97.5% by weight of an iron compound, calculated as Fe.sub.2 O.sub.3.
    Type: Grant
    Filed: June 21, 1988
    Date of Patent: August 15, 1989
    Assignee: Shell Oil Company
    Inventors: Pierre E. Dejaifve, Jean-Paul Darnanville, Jacques J. J. Dufour, Roland A. C. Garin
  • Catalyst for the non-oxidative dehydrogenation of alkylbenzene to alkenylbenzene
    Patent number: 4749674
    Abstract: Alkenylbenzenes, e.g. styrene, are prepared by non-oxidative dehydrogenation of alkylbenzenes at elevated temperature in the presence of steam and a novel catalyst comprising iron oxide and, as promoters, an alkali metal compound, .ltoreq.10% wt of a compound of a rare earth metal and a calcium compound (not a hydraulic cement) and <1.4% wt of a molybdenum compound.
    Type: Grant
    Filed: November 10, 1986
    Date of Patent: June 7, 1988
    Assignee: Shell Oil Company
    Inventors: Pierre E. Dejaifve, Jean-Paul Darnanville, Roland A. C. Garin
  • Process for the preparation of a hydrogen-rich gas
    Patent number: 4524058
    Abstract: A process is disclosed for preparing a hydrogen-rich gas, which is carried out by reacting a carbon monoxide-containing gas with steam in the presence of a catalyst. The catalyst contains a spinel whose composition is expressed by the formula Li.sub.x Cu.sub.(1-x) Fe.sub.5 O.sub.8 in which 0<x<1. Preferably a compound of an alkali metal is added to the catalyst.
    Type: Grant
    Filed: October 18, 1984
    Date of Patent: June 18, 1985
    Assignee: Shell Oil Company
    Inventors: Pierre E. Dejaifve, Gerard Quillaud