Patents Examined by Carl F. Dees
  • Patent number: 5336648
    Abstract: A novel catalyst composition comprising a crystalline aluminosilicate having a molar ratio of silica to alumina of at least 5:1, the aluminosilicate carrying gallium and copper, is useful in the conversion at elevated temperature of a C.sub.2 -C.sub.12 hydrocarbon feedstock into aromatic hydrocarbons.
    Type: Grant
    Filed: April 30, 1993
    Date of Patent: August 9, 1994
    Assignee: The British Petroleum Company p.l.c.
    Inventors: Anthony H. P. Hall, Alistair W. Winstanley
  • Patent number: 5336655
    Abstract: A catalytic system for the production of synthesis gas by reacting light hydrocarbons, preferably methane, with CO.sub.2 is described formed from:one or more compounds of metals of the platinum group, preferably chosen from rhodium, ruthenium and iridium;a support consisting of inorganic compounds chosen from oxides and/or spinels of aluminium, magnesium, zirconium, silicon, cerium and/or lanthanum, possibly in the presence of alkali metals,in which the weight percentage of the metal or metals of the platinum group in the catalytic system is between 0.01 and 20%, and preferably between 0.1 and 5%.
    Type: Grant
    Filed: June 2, 1992
    Date of Patent: August 9, 1994
    Assignee: Snamprogetti S.p.A.
    Inventors: Luca Basini, Mario Marchionna, Stephano Rossini, Domenico Sanfilippo
  • Patent number: 5336651
    Abstract: A TiO.sub.2 containing catalyst for denitrizing nitrogen oxides in the presence of a hydrocarbon as a reducing agent is disclosed. There are also disclosed denitrizing catalysts which contain zeolite or perovskite structure complex compound.
    Type: Grant
    Filed: June 30, 1993
    Date of Patent: August 9, 1994
    Assignee: Sakai Chemical Industry Co., Ltd.
    Inventors: Masafumi Yoshimoto, Tadao Nakatsuji, Hiromitsu Shimizu
  • Patent number: 5330956
    Abstract: The present invention provides a poisoning-resistant catalyst for combustion of CO and inflammable gases which comprises an inorganic carrier, a noble metal active ingredient supported on said inorganic carrier, and silica supported on said noble metal active ingredient, said noble metal active ingredient comprising at least one member selected from the group consisting of Pt, Rh and Pd, the surface of said catalyst being richer in silica and the inner part of said catalyst becoming richer in said noble metal active ingredient the deeper from the surface said inner part becomes; and a catalytic combustion apparatus for burning inflammable gases in a starting gas by the use of said catalyst. Said catalyst has a high resistance to poisoning and has a high level of activity at a low temperature of C. or lower.
    Type: Grant
    Filed: September 21, 1992
    Date of Patent: July 19, 1994
    Assignee: Hitachi, Ltd.
    Inventors: Tetsuro Haga, Hiroshi Kawagoshi, Hisao Yamashita
  • Patent number: 5330734
    Abstract: Microporous materials of low acidity useful as sorbents and catalytic supports have been produced by pillaring tetrasilicic mica with silica polyoxocations generated by hydrolysis of organosilane precursors. Calcination at an intermediate temperature followed by washing of the solid with water is important in producing highly microporous material.
    Type: Grant
    Filed: March 9, 1993
    Date of Patent: July 19, 1994
    Assignee: Exxon Research and Engineering Company
    Inventors: Jack W. Johnson, John F. Brody
  • Patent number: 5330945
    Abstract: A preferred catalytically active solid acid material, zeolite, forms the basis of a washcoat effective for treating diesel-fueled engine exhaust to reduce emission of particulate. In a preferred method, hydrocarbon in exhaust is cracked and oxidized in the presence of a zeolite/silica washcoat mixture catalyzed with precious metal. A preferred Y-type zeolite provides acidic (cationic) sites having releasable cations which are exchanged with precious metal to form catalyzed zeolite. A preferred method of making the catalyzed zeolite/silica washcoat is provided, whereby colloidal silica is disposed as a barrier over the catalyzed washcoat, limiting exposure of catalyst to sulfur constituents in the exhaust.
    Type: Grant
    Filed: November 3, 1992
    Date of Patent: July 19, 1994
    Assignee: General Motors Corporation
    Inventors: Richard F. Beckmeyer, Chih-Hao Tsang
  • Patent number: 5330943
    Abstract: A process for significantly improving the physical and catalytic properties of fluid cracking catalysts (FCC) is disclosed. The invention is a process for manufacturing a fluid cracking catalyst. The process includes adding an effective amount of an acid stable surfactant or an alkaline stable surfactant to a slurry of clay particles and sodium silicate particles. The process then includes forming a sol binder and spray drying the particles. Forming of the dried particles into a catalyst product then occurs.
    Type: Grant
    Filed: June 25, 1992
    Date of Patent: July 19, 1994
    Assignee: Thiele Kaolin Company
    Inventors: Joseph C. S. Shi, Edwin W. Alberg, Geoffrey R. Wilson
  • Patent number: 5330946
    Abstract: A bentonite clay-based polymerization catalyst is manufactured by adhering together a plurality of smaller acid-activated bentonite clay particles, using a strong mineral acid, such as H.sub.2 SO.sub.4, as a binder. An acid-activated bentonite clay having a particle size below about 60 mesh, U.S. Sieve Series, preferably calcium bentonite, having calcium as a predominant exchangeable action, is mixed with a strong mineral acid, preferably H.sub.2 SO.sub.4, and water to form the catalyst. The mixture is subjected to intensive mixing, curing and drying to form strong particles capable of grinding to a desired particle size distribution, e.g., -6 mesh to +60 mesh, U.S. Sieve Series, to form the catalyst. Fines resulting from the grinding step are completely recycled to the intensive mixing stage of the process to achieve 100% yield. Some adjustment of acid content of the mix may be needed to take into account the acid carried into the mix by recycled fines.
    Type: Grant
    Filed: January 29, 1993
    Date of Patent: July 19, 1994
    Assignee: American Colloid Company
    Inventors: Russell E. Hynes, Robert S. Nebergall
  • Patent number: 5330944
    Abstract: Tungsten carbide/zeolite catalysts useful in the hydrogenation of unsaturated sulfur containing compounds and in particular in the production of tetrahydrothiophene are provided.Also provided is a process for the production of tetrahydrothiophene from thiophene using the tungsten carbide/zeolite catalysts taught, which effects the selective production of tetrahydrothiophene without producing large quantities of H.sub.2 S and unwanted hydrocarbons.
    Type: Grant
    Filed: January 22, 1993
    Date of Patent: July 19, 1994
    Assignee: Akzo Nobel NV
    Inventors: Fawzy G. Sherif, Willem Vreugdenhil
  • Patent number: 5328894
    Abstract: A food-preserving agent comprising an oxygen absorbent and a compound represented by the following structural formula (I): ##STR1## , wherein n is an integer of 2 to 4 and X is H or CH.sub.3, can remove generated acetaldehyde effective, thereby preserving food without any fear of disagreeable odor for a long duration.
    Type: Grant
    Filed: March 5, 1992
    Date of Patent: July 12, 1994
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Hidechika Wakabayashi, Yasuo Sugihara, Akira Hosomi, Futoshi Nakaya
  • Patent number: 5326738
    Abstract: The present invention produces very stable, covalently bonded separation substrates for separations application such as liquid and gas chromatography as well as capillary zone electrophoresis. An intermediate substrate is prepared which has hydride species on the substrate surface. These hydrides preferably are further derivatized by the catalytic addition of organic compounds bearing a terminal vinyl group. The final surface modification contains closely packed, direct carbon linkages that are stable.
    Type: Grant
    Filed: March 9, 1992
    Date of Patent: July 5, 1994
    Inventors: Junior E. Sandoval, Joseph J. Pesek
  • Patent number: 5324702
    Abstract: Compositions comprising certain metal-containing materials distributed interactively on a deboronated HAMS-1B crystalline borosilicate molecular sieve which are useful for catalytically oxidizing or oxidatively dehydrogenating organic compounds such as alkanes, aromatics, and alkyl-substituted aromatics are described. Alkanes are oxidatively dehydrogenated to olefins, and an aromatic compound such as benzene can be oxidized by nitric and/or nitrous oxide to largely phenol or largely nitrobenzene depending upon the oxidation temperature. When the compound is a methylaromatic, oxidation produces an aromatic aldehyde. Alkyl groups larger than methyl oxidatively dehydrogenate to alkenyl groups.
    Type: Grant
    Filed: December 16, 1992
    Date of Patent: June 28, 1994
    Assignee: Amoco Corporation
    Inventors: Jin S. Yoo, Mark S. Kleefisch, John A. Donohue
  • Patent number: 5321185
    Abstract: A method of producing an oxidative coupling catalyst is disclosed by mixing particles of Fe.sub.2 O.sub.3, with a particle size in the range from 100 to 150 .mu.m, and silica, with a particle size in the range from about 150 to about 215 .mu.m. The particles are heated to a temperature of at least about C., after which the silica particles impregnated with Fe.sub.2 O.sub.3 are separated from the remaining iron particles. The catalyst can be utilized for the oxidative coupling of methane with water molecules on the surface of the silica substrate, with the silica having a particle size in the range from about 150 to about The silicate catalyst substrate is essentially non-porous and has an average geometrical surface on the order of about 0.004 .mu.m.sup.2 /g and a surface concentration of iron on the order of about 2% by weight.
    Type: Grant
    Filed: July 8, 1992
    Date of Patent: June 14, 1994
    Assignee: Virginia Tech Intellectual Properties
    Inventor: Donald R. van der Vaart
  • Patent number: 5318934
    Abstract: A catalyst for cleaning an exhaust gas includes a metal containing silicate containing Al and a metal M constituting a crystalline structure which is selected from a group consisting of Ga, In, B, Mn, Bi, Sc Y, V and Ta, a transition metal or a precious metal being carried in said metal containing silicate. The catalytic active range can be expanded.
    Type: Grant
    Filed: December 23, 1992
    Date of Patent: June 7, 1994
    Assignee: Mazda Motor Corporation
    Inventors: Toshitsugu Ueoka, Masahiko Shigetsu, Takashi Takemoto
  • Patent number: 5318766
    Abstract: The reaction of premade gels with KOH in aqueous ammonia solvents yields highly crystalline but ultrasmall particulate, colloidal, products having major advantages in catalytic and sorption process.
    Type: Grant
    Filed: September 25, 1992
    Date of Patent: June 7, 1994
    Assignee: Exxon Research and Engineering Company
    Inventors: David E. W. Vaughan, Karl G. Strohmeier
  • Patent number: 5316992
    Abstract: A catalyst system comprises a physical mixture of a conversion catalyst and a sulfur sorbent to accommodate small quantities of sulfur from a hydrocarbon feedstock. Preferably, the physical mixture comprises a sulfur-sensitive reforming catalyst protected from sulfur deactivation by a manganeseoxide catalyst. The invention shows substantial benefits over prior-art processes in catalyst utilization.
    Type: Grant
    Filed: November 13, 1992
    Date of Patent: May 31, 1994
    Assignee: UOP
    Inventors: Michael B. Russ, Paul A. Sechrist
  • Patent number: 5316993
    Abstract: A process for the production of moulded bodies from dealuminated Y-zeolite (SiO.sub.2 /Al.sub.2 O.sub.3 >20) in which the microporous system of the zeolites and its characteristic adsorption properties are preserved and a binder whose slurry in water does not exceed a pH of 10 used in quantities of from 2 to 40%, based on the quantity of zeolite mass put into the process.
    Type: Grant
    Filed: May 15, 1992
    Date of Patent: May 31, 1994
    Assignee: Degussa Aktiengesellschaft
    Inventors: Elfriede Sextl, Eckehart Roland, Peter Kleinschmit, Akos Kiss
  • Patent number: 5316991
    Abstract: A three-way catalyst system for efficiently converting the exhaust gas from a CNG-fueled engine when operated under lean conditions at a redox ratio of 0.02-0.9, the system comprising a first stage catalyst comprising a transition metal-containing zeolite; means for injecting a hydrocarbon into said exhaust gas prior to entry of said exhaust gas into said first stage catalyst, said hydrocarbon having a greater affinity than CH.sub.4 in its ability to react with NO; and a second stage catalyst for treating the effluent from said first stage catalyst and comprising a high surface area alumina impregnated with discontinuous La.sub.2 O.sub.3 and palladium.The invention also comprehends a method of treating exhaust gases from a lean-burn CNG-fueled engine, operating at a redox ratio of 0.02-0.
    Type: Grant
    Filed: November 8, 1991
    Date of Patent: May 31, 1994
    Assignee: Ford Motor Company
    Inventors: Somasundaram Subramanian, Robert J. Kudla, Mohinder S. Chattha
  • Patent number: 5316996
    Abstract: A compound oxide catalyst carrier which comprises a silica-alumina or a titania-alumina and has a relative standard deviation of peak intensity of aluminum ranging from 0.100 to 0.170, as measured by scanning a cross section of a particle of the compound oxide catalyst carrier with an EPMA in a scan-line direction along a diameter-line or an approximate diameter-line of the cross section, has a moderately uniform aluminum concentration distribution in solid particles a moderate acidity and, therefore, is suitable for use as a catalyst carrier requiring attrition resistance and ability of inhibiting generation of coke or excessive cracking, such as a carrier of catalysts for production of middle distillate fractions by a suspension bed process hydrocracking of heavy oil.
    Type: Grant
    Filed: May 14, 1992
    Date of Patent: May 31, 1994
    Assignee: Idemitsu Kosan Co., Ltd.
    Inventor: Toshio Itoh
  • Patent number: 5314852
    Abstract: A process for impregnating zeolite with a substance such as potassium hydroxide (KOH), and a product of such process. The process preferably includes the steps of dehydrating zeolite crystals, then immersing the dehydrated zeolite crystals in (or spraying the dehydrated crystals with) aqueous KOH and thoroughly mixing the resulting slurry, and finally air drying the mixed slurry to produce KOH--impregnated zeolite crystals. The zeolite crystals (after they are dried) are uniformly impregnated with a concentration of KOH in the range from about 5% to about 15% of the total product weight. In other embodiments, the inventive method includes the step of impregnating zeolite crystals with metal sulfates or soluble salts (such as Fe2S04, FeCl3, CuSO4, CuCl2, ZnSO4, ZnCl2, CoSO4, CoCl, MnSO4, MnCl, sodium selenate, or MgSO4), or other substances such as amino acids (e.g., methionine or lysine), urea, free amines, or vitamins (such as A, D, E, K, Biotin, Choline, Niacin, Riboflavin, and Pantothenic acid).
    Type: Grant
    Filed: January 5, 1993
    Date of Patent: May 24, 1994
    Inventor: Fred Klatte