Carbide Patents (Class 502/177)
  • Patent number: 4537867
    Abstract: Iron-cobalt spinels which contain low levels of cobalt, in an iron/cobalt atomic ratio of 7:1 to 35:1, are converted to Fischer-Tropsch catalysts upon reduction and carbiding that exhibit high activity and selectivity to C.sub.2 --C.sub.6 olefins and low CH.sub.4 production.
    Type: Grant
    Filed: December 14, 1983
    Date of Patent: August 27, 1985
    Assignee: Exxon Research and Engineering Co.
    Inventors: Rocco A. Fiato, Stuart L. Soled, Angelo A. Montagna
  • Patent number: 4536482
    Abstract: A catalyst is disclosed wherein a particulate catalyst support has cosputtered on its surface a mixture of a catalytically active metal such as Pt, Pd, Ag, Au, Re, Rh, Ru or Ir and a cosputtered support material which preferably is the same material as the catalyst support.
    Type: Grant
    Filed: October 31, 1984
    Date of Patent: August 20, 1985
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Peter F. Carcia
  • Patent number: 4522708
    Abstract: The present invention relates to catalysts for reforming petroleum products in mass form or supported for example, on aluminium or active carbon, the active part of which consists of tungsten and molybdenum carbides corresponding to the general formula:(Mox W.sub.1-x)y Czwherein0<x<11.ltoreq.y.ltoreq.20.8.ltoreq.z.ltoreq.1Nitridation prior to their use in a mixture H.sub.2 +N.sub.2 substantially increases the activity and selectivity thereof.These catalysts are not very sensitive to contamination by sulphur products.
    Type: Grant
    Filed: March 15, 1984
    Date of Patent: June 11, 1985
    Assignee: Eruotungstene-Poudres
    Inventors: Lucien Leclercq, Marcelle Provost
  • Patent number: 4518707
    Abstract: Slurried high surface area Fe-Co spinels which are fully reduced/carburized provide exceptionally high activity and selectivity in the conversion of CO/H.sub.2 to alpha-olefins. These iron-cobalt catalysts maintain good activity and selectivity under low pressure reaction conditions.
    Type: Grant
    Filed: December 14, 1983
    Date of Patent: May 21, 1985
    Assignee: Exxon Research & Engineering Co.
    Inventors: Stuart L. Soled, Rocco A. Fiato
  • Patent number: 4427578
    Abstract: This invention relates to a catalyst for use in the direct conversion of synthesis gas to olefinic hydrocarbons in good yield. It also relates to a process for producing the catalyst.The catalyst comprises a highly porous amorphous silica support on which is deposited one or more monolayers of silica. The catalyst is then impregnated with a transition metal. The monolayer of silica is formed by the hydrolysis of a compound such as ethyl orthosilicate while it is adsorbed onto the support.
    Type: Grant
    Filed: July 7, 1982
    Date of Patent: January 24, 1984
    Assignee: Coal Industry (Patents) Limited
    Inventors: Joseph G. Robinson, David I. Barnes, Angela M. Carswell
  • Patent number: 4422957
    Abstract: A supported high efficiency catalyst component for polyolefin production and methods of making and using the same are disclosed. An enhanced support made from the materials comprising a support base, an inorganic Lewis acid and an electron donor is combined with an active transition metal compound and optionally a second electron donor to form the catalyst component. Additionally, a dehydrating agent may be pre-combined with the support base in the production of the catalyst support. The methods of producing such catalyst supports and catalyst components are performed by milling in the absence of any solvent. Such catalysts produce polymer of such high quality and quantity that polymer extraction and polymer deashing are not necessary.
    Type: Grant
    Filed: June 18, 1982
    Date of Patent: December 27, 1983
    Assignee: Phillips Petroleum Company
    Inventors: Malcolm J. Kaus, Nemesio D. Miro
  • Patent number: 4414182
    Abstract: Hydrogen is generated by contacting an alkaline aqueous solution of formaldehyde with at least one catalyst selected from the group consisting of molybdenum, tungsten, molybdenum carbides, tungsten carbides, molybdenum nitrides, tungstenum borides, copper, silver, gold and compounds of copper, silver and gold.Hydrogen can be generated at ambient temperature under atmospheric pressure and, therefore, complicated steps or complicated devices are unnecessary.
    Type: Grant
    Filed: February 2, 1982
    Date of Patent: November 8, 1983
    Assignee: Hitachi, Ltd.
    Inventors: Hiroshi Okamoto, Tetsuichi Kudo, Go Kawamura