Patents Represented by Attorney Raymond Keller
  • Patent number: 7311891
    Abstract: Recovering sulfur from a gas stream containing hydrogen sulfide by oxidizing the gas stream to convert the hydrogen sulfide in the gas stream to sulfur oxide, and thus form a sulfur oxide enriched gas stream. The sulfur oxide enriched gas stream is contacted with a solid, sulfation resistant adsorbent bed at relatively low temperatures to extract the sulfur oxides and retain them as sulfur compounds, thus forming a sulfur oxide depleted gas stream. The adsorbent bed is then contacted with an inert or reducing gas stream to reduce the retained sulfur compounds to sulfur and/or sulfur dioxide and thereby form an enriched sulfur and/or sulfur dioxide bearing stream. The elemental sulfur is recovered and/or the sulfur dioxide bearing stream may be recycled to the Claus unit for further conversion.
    Type: Grant
    Filed: March 9, 2005
    Date of Patent: December 25, 2007
    Assignee: BASF Catalysts LLC
    Inventors: William Bachop Dolan, John Warren Byrne, Michael John Mitariten, Kenneth Butwell, Alfonse Maglio
  • Patent number: 7285695
    Abstract: The invention is directed to a process for the hydrogenation of hydrocarbon resins in the presence of a precious metal catalyst, wherein the hydrogenation is performed in the additional presence of at least one metal oxide, capable of reacting with sulfide and/or halogen.
    Type: Grant
    Filed: November 1, 2000
    Date of Patent: October 23, 2007
    Assignee: Engelhard Corporation
    Inventors: Bernard Hendrik Reesink, Willem Dijkstra
  • Patent number: 4368133
    Abstract: Combinations of carboxylic solubilizers, made by reaction of an acylating agent with an N-(hydroxyl-substituted hydrocarbyl) amine and surfactants are useful in incorporating oil-soluble, water-insoluble functional additives into aqueous systems. Typical solubilizers are made by reacting an alkyl-substituted succinic anhydride containing about 12 to about 500 carbon atoms with an alkanol amine such as diethyl ethanol amine. Typical surfactants are nonionic hydrophilic surfactants such as ethoxylated phenols and ionic surfactants of both the anionic and cationic type. Typical functional additives are anti-wear, extreme pressure and load-carrying agents such as dithiophosphates. The aqueous systems formed with the aid of such combinations are useful, for example, as water-based hydraulic fluids.
    Type: Grant
    Filed: February 25, 1981
    Date of Patent: January 11, 1983
    Assignee: The Lubrizol Corporation
    Inventor: John W. Forsberg