Patents Examined by H. M. S. Sneed
  • Patent number: 5185484
    Abstract: A Pt/Ba/USY catalyst prepared with a high SiO.sub.2 /Al.sub.2 O.sub.3 ratio USY gives improved aromatics selectivity compared to other Pt/USY containing catalysts. The improved selectivity is a result of the method of catalyst preparation which includes incorporation of a Group IIA metal after platinum incorporation.
    Type: Grant
    Filed: December 26, 1989
    Date of Patent: February 9, 1993
    Assignee: Mobil Oil Corp
    Inventors: Kenneth J. Del Rossi, Garry W. Kirker, Albin Huss, Jr.
  • Patent number: 5118898
    Abstract: A process for the production of ethylene from a methane rich gas stream and an ethane rich gas stream. The process comprises the steps of:(a) introducing the methane rich gas stream together with molecular oxygen into a lower zone of a fluidized-bed of particles which are catalytically active in promoting an exothermic oxidative coupling reaction to produce ethylene and other hydrocarbons,(b) mixing the ethane rich gas stream into the fluidized-bed above the level at which substantially all of the molecular oxygen has been consumed, and(c) subjecting the mixture resulting from step (b) to an endothermic pyrolysis reaction in an upper zone of the fluidized-bed to produce further ethylene and other olefinically unsaturated hydrocarbons.The process is characterized in that the pyrolysis step (c) is carried out substantially without the addition of heat to the reactor, other than the heat content of the methane rich and ethane rich gas streams and the heat generated by the exothermic oxidative coupling reaction.
    Type: Grant
    Filed: March 14, 1990
    Date of Patent: June 2, 1992
    Assignees: The Broken Hill Proprietary Company Limited, Commonwealth Scientific & Industrial Research Organization
    Inventors: Ralph J. Tyler, James H. Edwards, Peter J. Jackson
  • Patent number: 5043511
    Abstract: Alkyl aromatic compounds may be prepared by reacting an aromatic compound such as benzene with an alkylating agent such as an olefin or alkyl halide in the presence of an alkylation catalyst. The alkylation catalyst of the present invention comprises a clay which has been coextruded with a multi-valent metal and preferably a metal selected from the group consisting of Groups IIIA, IIIB and IVB of the Periodic Table. The resultant extrudate is then impregnated with a dissimilar multi-valent metal selected from the above named groups followed by calcination to form the desired composite. By utiilzing this catalytic composite in an alkylation reaction it is possible to obtain improved yields of alkyl aromatic compounds which may then be used in the preparation of biodegradable detergents.
    Type: Grant
    Filed: November 13, 1989
    Date of Patent: August 27, 1991
    Assignee: UOP
    Inventors: Tamotsu Imai, Joseph A. Kocal
  • Patent number: 5043507
    Abstract: An alkyl-substituted hydrocarbon is prepared by alkylating an alkyl aromatic hydrocarbon having at least one hydrogen atom at an alpha-position in a side chain with an olefin in the presence of a solid base which is obtainable by reacting an alumina with an alkali metal carbonate and/or aluminate and an alkali metal amd/or its hydride in an inert gas atmosphere at a temperature of 180.degree. to 800.degree. C. as a catalyst.
    Type: Grant
    Filed: August 29, 1989
    Date of Patent: August 27, 1991
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Masami Fukao, Takuo Hibi, Kiyoshi Ikimi, Gohfu Suzukamo
  • Patent number: 5043515
    Abstract: This invention relates to an oligomerization catalyst comprising a zirconocene and one or more alkyl aluminoxanes wherein the alkyl is selected from methyl, ethyl and mixtures thereof and the ratio of equivalents of methyl to ethyl in the product ranges from about 4 to about 0.25 and wherein the atom ratio of aluminum to zirconium ranges from about 1 to about 100. It further relates to the method for preparing the catalyst and the use of the catalyst in an oligomerization process. The catalyst is particularly suited for the oligomerization of ethylene.
    Type: Grant
    Filed: August 8, 1989
    Date of Patent: August 27, 1991
    Assignee: Shell Oil Company
    Inventors: Lynn H. Slaugh, Galeon W. Schoenthal
  • Patent number: 5037816
    Abstract: A method of treating psoriasis in a patient which comprises administering to said patient an effective amount of a vitamin D compound which is capable of stimulating the differentiation of cultured tumor cells or normal rodent or human fibroblasts or keratinocytes in vitro.
    Type: Grant
    Filed: December 21, 1987
    Date of Patent: August 6, 1991
    Assignee: The General Hospital Corporation
    Inventors: Michael F. Holick, Julia McLaughlin
  • Patent number: 5037997
    Abstract: A method of preparing 1-butene and/or hexenes resides in dimerization of ethylene and/or co-dimerization of ethylene and propylene in an organic solvent under an increased pressure and at a temperature of 0.degree. to 100.degree. C. in the presence of a complex organometallic catalyst. The catalyst contains titanium alcoholate of the formula Ti(OR.sup.1).sub.4, where R.sup.1 is an alkyl radical having from 1 to 8 carbon atoms or aryl, trialkylaluminium of the formula AlR.sup.2.sub.3, where R.sup.2 is an alkyl radical having from 1 to 6 carbon atoms, an organomagnesium compound of the formula MgR.sup.2.sub.2 and/or MgR.sup.3 X, where R.sup.3 is an alkyl radical having from 1 to 4 carbon atoms and X is Br, Cl, or I.
    Type: Grant
    Filed: December 18, 1989
    Date of Patent: August 6, 1991
    Assignees: Institut Khimicheskoi Fiziki an SSSR, Groznensky Filial Oppo, Po Stavropolpolimer
    Inventors: Viktor I. Zhukov, Gennady P. Belov, Galina S. Sergienko, Zinaida M. Dzhabieva, Saida R. Ivolgina, Natalya V. Kartasheva, Fridrikh S. Dyachkovsky, Sergei S. Ivanchev, Vladimir L. Proskurnin, Jury M. Petrov, Olga N. Reznikova
  • Patent number: 5034206
    Abstract: Disclosed is a method of making aluminum borate fibers comprising the steps of preparing an aluminum borate gel by reacting aluminum salt in a solution with ammonium borate and heating the gel to form the aluminum borate fibers.
    Type: Grant
    Filed: July 1, 1988
    Date of Patent: July 23, 1991
    Assignee: Aluminum Company of America
    Inventor: Chanakya Misra
  • Patent number: 5030432
    Abstract: A crystalline, galliosilicate molecular sieve of the zeolite omega structure and having the following composition expressed in terms of oxide mole ratios in the anhydrous state:Ga.sub.2 O.sub.3 :xSiO.sub.2 :yM.sub.2 Owhere M is an alkali metal, preferably sodium, x equals 5 to 30, preferably 5 to 15, and y equals about 1.0. The crystalline, galliosilicate molecular sieve of the invention is crystallized in the absence of a templating agent from a mixture of a substantially alumina-free hydrogel containing gallia and a substantially alumina-free galliosilicate solution. The resultant sieve may be employed, after reducing its alkali metal content, as a component of a catalyst which can be used in a variety of chemical conversion processes.
    Type: Grant
    Filed: October 18, 1989
    Date of Patent: July 9, 1991
    Assignee: Union Oil Company of California
    Inventor: Mario L. Occelli
  • Patent number: 5030291
    Abstract: A device for cleaning opposing surfaces (13, 14) of concentric columns (11, 12) is formed from a strip of material (20) configured as a spiral having inside and outside edges (21, 22) such that each edge (21, 22) forms a helix. The device (10) is utilized by introducing it between the concentric columns (11, 12). The strip (20) inside edge (21) abuts the opposing surface (13) of the inner column (11), and the outside edge (22) abuts the opposing surface (23) of the outside column (12). The device (10) is forced to travel along the lengths of the columns (11, 12) by an hydraulic fluid downflow thereby scraping deposits from the opposing surfaces (13, 14).
    Type: Grant
    Filed: August 4, 1989
    Date of Patent: July 9, 1991
    Assignee: Eau-Viron Incorporated
    Inventor: James A. Titmas
  • Patent number: 5030315
    Abstract: A method of manufacturing compound semiconductor crystals, comprising the steps of, providing a compound semiconductor melt in a crucible, said melt having a composition ratio which deviates from stoichiometry, pulling a compound semiconductor crystal from said crucible by using a seed crystal, and during the pulling step, adding to the melt a constitutional element of said compound semiconductor melt which is present in less than a stoichiometric amount, the element being added in a quantity sufficient to maintain said composition ratio of the first step. An apparatus for manufacturing compound semiconductor crystals is also provided.
    Type: Grant
    Filed: September 18, 1986
    Date of Patent: July 9, 1991
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Syoichi Washizuka, Kazutaka Terashima, Johji Nishio, Masayuki Watanabe
  • Patent number: 5028631
    Abstract: Compounds of the formula: ##STR1## useful as anti-cancer agents, anti-obesity agents, anti-hyperglycemic agents, anti-aging agents, anti-hyperglycemic agents and anti-autoimmune agents.
    Type: Grant
    Filed: November 25, 1987
    Date of Patent: July 2, 1991
    Inventors: Arthur G. Schwartz, Marvin L. Lewbart
  • Patent number: 5028406
    Abstract: A crystalline, galliosilicate molecular sieve having the mordenite structure and the following composition expressed in terms of oxide mole ratios in the anhydrous state:Ga.sub.2 O.sub.3 :xSiO.sub.2 :yM.sub.2 O:tQ.sub.2 Owhere M is an alkali metal, preferably sodium, Q is a quaternary ammonium cation, preferably a benzyltriethylammonium cation, x equals 5.0 to 30, y equals 0.1 to 0.99, preferably 0.40 to 0.90, t equals 0.01 to 0.9, preferably 0.1 to 0.6 and yet equals about 1.0. The crystalline, galliosilicate molecular sieve of the invention may be employed, after reducing its alkali metal content and decomposing Q, as a component of a catalyst which can be used in a variety of chemical conversion processes.
    Type: Grant
    Filed: November 29, 1989
    Date of Patent: July 2, 1991
    Assignee: Union Oil Company of California
    Inventor: Mario L. Occelli
  • Patent number: 5026944
    Abstract: A process is described in which methane is reacted with acetylene in the presence of a solid acid catalyst containing fluoride to produce isobutene in high yields. The process may take place at room temperature or lower and atmospheric pressure. The conversion of acetylene typically approaches 100% and the methane conversion has been found to surpass stoichiometric requirements.
    Type: Grant
    Filed: December 20, 1989
    Date of Patent: June 25, 1991
    Assignee: Energy Mines and Resources Canada
    Inventors: Vincenza Allenger, Raj N. Pandey, Prasad Yarlagadda
  • Patent number: 5026532
    Abstract: A process is provided for preparing a synthetic chabazite having a Si/Al ratio of 1.8 to 2.3 by mixing an alumina source, sodium hydroxide, potassium hydroxide, a TMA reagent at a ratio of (TMA).sub.2 O:Al.sub.2 O.sub.3 of 0.08 to 0.0001, and a silica source to form a gel, crystallizing the gel by heating at a temperature of from about 25.degree. to 150.degree. C. for at least one hour, and separating the resulting chabazite product.
    Type: Grant
    Filed: April 6, 1989
    Date of Patent: June 25, 1991
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Thomas R. Gaffney, Charles G. Coe
  • Patent number: 5023388
    Abstract: Polyethylene waxes having a very narrow molecular weight distribution, high isotacticity, a narrow grain size distribution and a high bulk density are obtained by means of a catalyst comprising a metallocene and an aluminoxane, in the presence of small amounts of hydrogen during the polymerization.
    Type: Grant
    Filed: December 19, 1988
    Date of Patent: June 11, 1991
    Assignee: Hoechst Aktiengesellschaft
    Inventor: Hartmut Luker
  • Patent number: 5023390
    Abstract: A process for production of 2,6-dimethylnaphthalene is disclosed; comprising the steps: (1) an acylation step where 2,4-dimethylisobutyrophenone is produced from m-xylene, propylene and carbon monoxide: (2) a hydrogenation step where the carbonyl group of the above 2,4-dimethylisobutyrophenone is hydrogenated: and (3) a dehydrogenation and cyclization step where the above hydrogenated product is subjected to dehydrogenation and cyclization to produce the desired 2,6-dimethylnaphthalene. The process enables efficiently producing high quality or high purity 2,6-dimethylnaphthalene.
    Type: Grant
    Filed: September 12, 1989
    Date of Patent: June 11, 1991
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Takafumi Abe, Shuji Ebata, Hiroshi Machida, Koichi Kida
  • Patent number: 5021224
    Abstract: A method and apparatus for growing crystals of a more than three multicomponents compound semiconductor from its growth solution in which a source material containing at least one solute element is immersed and dissolved in the growth solution by conducting DC electric current from a current supplying electrode immersed in the growth solution through the growth solution to the source material, and thus a desired composition of the growth solution can be constantly maintained. As a result, the composition of the grown crystals of the multicomponents compound semiconductor can be also controlled to a desired proportion.
    Type: Grant
    Filed: May 20, 1986
    Date of Patent: June 4, 1991
    Assignee: Fujitsu Limited
    Inventor: Kazuo Nakajima
  • Patent number: 5021141
    Abstract: This invention relates to a new form of crystalline material identified as ZSM-12 type, to a new and useful improvement in sunthesizing said crystalline material and to use of said crystalline material prepared in accordance herewith as a catalyst for organic compound e.g. hydrocarbon compound, conversion.
    Type: Grant
    Filed: September 14, 1990
    Date of Patent: June 4, 1991
    Assignee: Mobil Oil Corp.
    Inventor: Mae K. Rubin
  • Patent number: 5021118
    Abstract: A method and apparatus for drawing up a single crystal using a double-crucible apparatus and a liquid capsule process. The inner crucible of the double-crucible apparatus is attached to the outer crucible. The presence of through holes in the lower portions of the inner crucible allow communication between the molten raw material in the inner and outer crucibles. Through holes in the upper portion of the inner crucible allow communication between the liquid sealing agent covering the molten raw material in the inner and outer crucibles. Single crystals having uniform impurity concentration and few defects are rapidly grown because the interface between the liquid sealing agent and molten raw material in the inner crucible is even with the same interface in the outer crucible.
    Type: Grant
    Filed: November 24, 1986
    Date of Patent: June 4, 1991
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventor: Akihisa Kawasaki