Patents Assigned to Vniigaz
  • Zeolitic desulfuring agents and their application in the processing of gasses containing notable CO.sub.2 proportions
    Patent number: 5609842
    Abstract: It is now possible to desulfurize gases containing appreciable carbon dioxide proportions by limiting the production of carbon oxysulfide to a very low level, by treating these gases with adsorbents composed of very small, partially calcic zeolite A crystals agglomerated by clays containing low levels of iron and having reduced acidity and basicity. These clays may be obtained by phosphatization of montmorillonite, bentonite, attapulgite, or kaolin.
    Type: Grant
    Filed: November 22, 1994
    Date of Patent: March 11, 1997
    Assignee: Vniigaz
    Inventors: Albert M. Tsybulevski, Vladimir I. Mourine, Dominique Plee, Francis Mayolet
  • Desulfurization of sulfur compound-containing gases with vanadium catalysts
    Patent number: 5604173
    Abstract: Particular mixed vanadium/other metal catalysts, well suited for the desulfurization of gaseous effluents containing contaminating amounts of objectionable sulfur compounds, typically via the Claus reaction and notably in the presence of oxygen, comprise a support substrate, e.g., titanium dioxide, having an active catalytic phase deposited thereon, such active catalytic phase being constituted of an electroneutral solid solution having the average composition:A.sub.4.+-.y V.sub.2.+-.x O.sub.9in which A is a metal other than vanadium, e.g., magnesium, calcium or zinc, 0.ltoreq.x.ltoreq.0.2 and 0.ltoreq.y.ltoreq.0.5.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: February 18, 1997
    Assignees: Institut De Catalyse Du Department Siberien De L'Academie Des Sciences De Russie, Vniigaz
    Inventors: Roman A. Bouyanov, Albert M. Tsyboulesky, Boris P. Zolotovsky, Dimitri P. Klevtsov, Vladimir L. Mourine
  • Vanadium catalysts and desulfurization of sulfur compound-containing gases therewith
    Patent number: 5512258
    Abstract: The desulfurization of gaseous effluents containing contaminating amounts of objectionable sulfur compounds, typically via the Claus reaction and notably in the presence of oxygen, utilizing a support substrate, e.g., titanium dioxide, having an active catalytic phase deposited thereon, such active catalytic phase being constituted of an electroneutral solid solution having the average composition:A.sub.4.+-.y V.sub.2.+-.x O.sub.9in which A is a metal other than vanadium, e.g., magnesium, calcium or zinc, 0.ltoreq.x.ltoreq.0.2 and 0.ltoreq.y.ltoreq.0.5.
    Type: Grant
    Filed: August 16, 1994
    Date of Patent: April 30, 1996
    Assignee: Institut De Catalyse Du Departement Siberien De L'Academie Des Sciences De Russie and Vniigaz
    Inventors: Roman A. Bouyanov, Albert M. Tsyboulesky, Dimitri P. Klevtsov, Vladimir I. Mourine
  • Vanadium catalysts and desulfurization of sulfur compound-containing gases therewith
    Patent number: 5369076
    Abstract: Particular mixed vanadium/other metal catalysts, well suited for the desulfurization of gaseous effluents containing contaminating amounts of objectionable sulfur compounds, typically via the Claus reaction and notably in the presence of oxygen, comprise a support substrate, e.g., titanium dioxide, having an active catalytic phase deposited thereon, such active catalytic phase being constituted of an electroneutral solid solution having the average composition:A.sub.4.+-.y V.sub.2.+-.x O.sub.9in which A is a metal other than vanadium, e.g., magnesium, calcium or zinc, 0.ltoreq.x.ltoreq.0.2 and 0.ltoreq.y.ltoreq.0.5.
    Type: Grant
    Filed: June 17, 1992
    Date of Patent: November 29, 1994
    Assignee: Institut de Catalyse du Department Siberien de l'Academie des Sciences de Russie and Vniigaz (Institut de recherches de gas naturels)
    Inventors: Roman A. Bouyanov, Albert M. Tsyboulesky, Boris P. Zolotovsky, Dimitri P. Klevtsov, Vladimir I. Mourine
  • Method of treating natural gas to obtain a methane rich fuel gas
    Patent number: 4305733
    Abstract: A method for the recovery of a methane-rich natural gas from a natural gas containing, apart from methane, also hydrogen sulfide, carbondioxide, higher hydrocarbons and, in most cases, organosulfur compounds. According to the invention a hydrocarbon fraction of C.sub.4 hydrocarbons and higher is naturally removed from the natural gas which is then subjected to a selective scrubbing for the removal of hydrogen sulfide with a regeneratable extraction, of scrubbing liquid. Next a C.sub.3 fraction is removed, the remaining gas being scrubbed with a second regeneratable washing agent, for the removal of carbondioxide to leave the methane-rich gas.
    Type: Grant
    Filed: March 6, 1980
    Date of Patent: December 15, 1981
    Assignees: Linde AG, Vniigaz
    Inventors: Walter Scholz, Gerhard Ranke, Hans Becker, Boris G. Bergo, Alexander I. Grizenko, Alexej V. Frolov