Patents Examined by Asok Pal
  • Patent number: 5510557
    Abstract: Catalytic dehydrogenation wherein feed is passed in one direction through the bed in a first cycle and heating gas is passed in an opposite direction in a second cycle to provide the endothermic heat of reaction and regenerate catalyst. The operation is controlled to balance properly heat absorbed during dehydrogenation and heat input during regeneration; e.g., by having catalyst of different activities over the length of the bed.
    Type: Grant
    Filed: February 28, 1994
    Date of Patent: April 23, 1996
    Assignee: ABB Lummus Crest Inc.
    Inventors: Robert J. Gartside, Cemal Ercan, Kandasamy M. Sundaram
  • Patent number: 5510561
    Abstract: A discrete catalyst and processes for the alkylation of isoalkanes with alkenes under homogenous fluid conditions. The catalyst is formed by contacting, under fluid conditions, a homogenous fluid containing a paraffin hydrocarbon having from 4 to 12 carbon atoms with a Lewis acid/protic Bronsted acid pair to produce a discrete catalytic complex that is soluble in the fluid. The discrete catalyst is the reaction product of the acid pair and alkanes and includes hydrocarbon ligands of limited chain length rendering it soluble in the fluid. The catalyst is active for the alkylation of isoalkanes, under homogenous fluid conditions.
    Type: Grant
    Filed: March 6, 1995
    Date of Patent: April 23, 1996
    Assignee: Kerr-McGee Chemical Corporation
    Inventors: Larry G. Sherman, William A. Yuill
  • Patent number: 5510556
    Abstract: Disclosed is a process for producing normal alpha olefins having less than 1.0% saturates content, and typically no more than 0.40% saturates content. The process involves forming a mixture of normal alpha olefins and tri(higher)alkyl aluminum compounds, contacting this mixture with a cobalt-containing transalkylation catalyst, and hydrolyzing the normal alpha olefin/transalkylation catalyst mixture to minimize the amount of saturates formed. In one embodiment, the catalyst is a cobalt- and nickel-containing transalkylation catalyst. After hydrolysis, the resulting normal alpha olefins contain essentially no Group VIII metal that is capable of transalkylation.
    Type: Grant
    Filed: September 1, 1994
    Date of Patent: April 23, 1996
    Assignee: Chevron Chemical Company
    Inventors: Loren W. Hedrich, Alfred N. Kresge, Roger C. Williamson
  • Patent number: 5508246
    Abstract: A new catalyst based on coprecipitated mixtures or solid solutions of alkaline earth oxides and rare earth oxides, such as mixtures or solid solutions of magnesium oxide and cerium oxide, Mg.sub.5 CeO.sub.x, or magnesium oxide and yttrium oxide, Mg.sub.5 YO.sub.x, which catalyze aldol condensation reactions leading to the selective formation of branched C.sub.4 alcohols. The catalysts may also contain a Group IB metallic component and further an alkali dopant. Preferably, Cu in concentrations at or lower than 30 wt % and K in concentrations at or lower than 3 wt % will be used. The catalyst affords the advantage of being run at pressures lower than those required by prior art catalysts and are more active and selective to methanol and isobutanol.
    Type: Grant
    Filed: November 18, 1994
    Date of Patent: April 16, 1996
    Assignee: Exxon Research and Engineering Company
    Inventors: Carlos R. Apesteguia, Stuart L. Soled, Sabato Miseo
  • Patent number: 5506365
    Abstract: The invention relates to a process for the conversion of petroleum hydrocarbons in the presence of catalyst particles in a fluidized phase in an essentially upflow or downflow tubular reaction zone. The process includes at least one stage of steam cracking of at least one light hydrocarbon fraction and a stage of catalytic cracking of at least one heavy hydrocarbon fraction. The steam cracking is carried out by contacting the light hydrocarbons and a quantity of steam equal to at least 20 percent by weight in a fluidized bed of the catalyst particles, the resulting temperature ranging from 650.degree. to 850.degree. C. The catalytic cracking of the heavy hydrocarbons is carried out by injection of the effluents from the upstream section of the reaction zone into the catalyst suspension in such a way that the temperature of the mixture ranges from 500.degree. to 650.degree. C. and is then reduced to a temperature ranging 475.degree. to 550.degree. C.
    Type: Grant
    Filed: May 6, 1993
    Date of Patent: April 9, 1996
    Assignee: Compagnie de Raffinage et de Distribution Total France
    Inventors: Jean-Louis Mauleon, Jean-Bernard Sigaud, Jean-Claude Courcelle
  • Patent number: 5506273
    Abstract: A catalyst for the hydrogenation of CO and CO.sub.2 consists essentially of a metal oxide and gold. Synthesis of methanol and hydrocarbons by hydrogenation of CO and CO.sub.2 comprises establishing contact between a gaseous mass consisting of CO, CO.sub.2, and hydrogen and a catalyst consisting essentially of a metal oxide and gold.
    Type: Grant
    Filed: June 21, 1994
    Date of Patent: April 9, 1996
    Assignees: Agency of Industrial Science and Technology, Ministry of International Trade and Industry
    Inventors: Masatake Haruta, Hiroaki Sakurai, Tetsuhiko Kobayashi, Susumu Tsubota, Atsushi Ueda, Masanori Ando
  • Patent number: 5504050
    Abstract: A process is provided for the manufacture of a catalytically-active carbonaceous char capable of rapidly decomposing hydrogen peroxide in aqueous solutions. The process of the invention uses a low-temperature carbonization and extensive oxidation of a bituminous coal or material having bituminous properties followed by exposure to a nitrogen-containing compound as the temperature of the carbonized and extensively oxidized char is increased to minimally 700.degree. C. The resultant char may then be activated as desired. These catalytically-active chars have the ability to rapidly decompose aqueous solutions of hydrogen peroxide and are useful for catalytic conversion of H.sub.2 S, SO.sub.2, NO, chloramines, and/or peroxides in liquid and/or gaseous streams.
    Type: Grant
    Filed: March 21, 1995
    Date of Patent: April 2, 1996
    Assignee: Calgon Carbon Corporation
    Inventor: Richard A. Hayden
  • Patent number: 5504051
    Abstract: To present a ceramic sheet with catalyst high in porosity, excellent in combustion efficiency, and easy to process into any desired shape, an inorganic oxide 4 carrying a noble metal catalyst 5 is dispersed and mixed together with ceramic fibers 1 and an inorganic binder 2, and an inorganic flocculant and an organic binder 3 possessing the flocculating effect are added to form flocs, a sheet is formed by a paper making method, and it is heated at 950.degree. C. or less, thereby obtaining a ceramic sheet carrying the noble metal catalyst in a state of being uniformly dispersed in the entire inner parts.
    Type: Grant
    Filed: October 21, 1993
    Date of Patent: April 2, 1996
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kenichi Nakamura, Kunio Kimura, Hironao Numoto, Tetsuo Terashima
  • Patent number: 5504259
    Abstract: A process for conversion of a feedstock selected from the group consisting of biomass and refuse derived fuel (RDF) to provide reformulated gasoline components comprising a substantial amount of materials selected from the group consisting of ethers, alcohols, or mixtures thereof, comprising: drying said feedstock; subjecting said dried feedstock to fast pyrolysis using a vortex reactor or other means; catalytically cracking vapors resulting from said pyrolysis using a zeolite catalyst; condensing any aromatic byproduct fraction; catalytically alkylating any benzene present in said vapors after condensation; catalytically oligomerizing any remaining ethylene and propylene to higher olefins; isomerizing said olefins to reactive iso-olefins; and catalytically reacting said iso-olefins with an alcohol to form ethers or with water to form alcohols.
    Type: Grant
    Filed: October 29, 1992
    Date of Patent: April 2, 1996
    Assignee: Midwest Research Institute
    Inventors: James P. Diebold, John W. Scahill, Helena L. Chum, Robert J. Evans, Bahman Rejai, Richard L. Bain, Ralph P. Overend
  • Patent number: 5502262
    Abstract: A process for the desulfurization of a sulfur-containing composition is described. The process comprises providing a sulfur-containing composition, adding an aqueous medium and a sulfur absorbent to the composition, and subjecting the resultant mixture to hydrothermal reaction under specific conditions to obtain a desulfurized product. When the sulfur-containing composition is made of vulcanized rubbers, the rubber can be converted into oily substances by treating the rubber product under supercritical conditions using an aqueous medium. The conversion reaction is facilitated by addition of metal oxides or salts.
    Type: Grant
    Filed: March 29, 1994
    Date of Patent: March 26, 1996
    Assignees: Nakamichi Yamasaki, Nishikawa Rubber Co., Ltd.
    Inventors: Nakamichi Yamasaki, Kenji Tsuda, Hiroyuki Okuda, Toshinari Tenno
  • Patent number: 5502265
    Abstract: A process for polymerizing olefins with a catalyst system which comprises contacting a ribbon-like clay selected from the group consisting of sepiolites with a chromium solution. Preparation of said chromium solution comprises the steps offa) dissolving a chromium salt and a base in water by heating solution at a temperature in the range of about 20.degree. C. to about 100.degree. C. thereby producing a first chromium solution having a pH in the range of about 1.5 to 2.5;b) diluting said first chromium solution with water so as to produce a second chromium solution wherein first chromium solution is diluted such that the ratio of added water to first chromium solution is in the range of about 5 ml H.sub.2 O to about 10 mls H.sub.2 O to per ml first solution, and thereafter heating said second chromium solution at a temperature in the range of about 60.degree. C. to about 95.degree. C. for a time period in the range of about 60 to about 180 minutes.
    Type: Grant
    Filed: September 29, 1994
    Date of Patent: March 26, 1996
    Assignee: Phillips Petroleum Company
    Inventor: Joseph S. Shveima
  • Patent number: 5501812
    Abstract: The present invention relates to toilet bar soap compositions comprising 1 to 45% by wt. of specified alkali metal (alkyl glycosid) uronates and to processes for making them.
    Type: Grant
    Filed: October 12, 1993
    Date of Patent: March 26, 1996
    Assignee: Lever Brothers Company, Division of Conopco, Inc.
    Inventors: Robert Vermeer, Bijan Harichian, John Gormley, Michael Massaro, George Grudev
  • Patent number: 5502019
    Abstract: Provided are improved catalyst compositions for use in oxidizing carbon monoxide and methods of preparing these catalysts. The catalyst compositions are particularly useful at ambient temperatures. The catalyst compositions, prepared by a coprecipitation method, comprise an oxide of cobalt as the principal component with one or more metals selected from the group consisting of manganese (Mn), aluminum (Al), bismuth (Bi), cerium (Ce), chromium (Cr), copper (Cu), iron (Fe), lanthanum (La), magnesium (Mg), titanium (Ti), zinc (Zn), and zirconium (Zr).
    Type: Grant
    Filed: July 15, 1994
    Date of Patent: March 26, 1996
    Assignee: Philip Morris Incorporated
    Inventors: Robert L. Augustine, Jay A. Fournier, John B. Paine, III, Kenneth H. Shafer, Setrak K. Tanielyan
  • Patent number: 5500400
    Abstract: There are a catalyst for producing 1,1,1,2-tetrafluoroethane represented as Cr.sub.a L.sub.b M.sub.c O.sub.x F.sub.y wherein L is Mg or Ca; M is one element selected from a group consisting of Ce, Ni, Zn, and Al; and each value of a, b, c, x and y are all between 0 and 2, and a method for preparing the same comprising the steps of: producing an admixture of a composition comprising chromium hydroxide hydrate and magnesium chloride or calcium chloride in a weight ratio of Cr to Mg or Ca ranging from 1:0.3 to 1:10 with an aqueous metal salt solution; reacting the admixture with an aqueous HF solution to give a paste; and sintering the paste.
    Type: Grant
    Filed: September 8, 1994
    Date of Patent: March 19, 1996
    Assignee: Korea Institute of Science and Technology
    Inventors: Hoon Sik Kim, Byung Gwon Lee, Honggon Kim, Kun You Park
  • Patent number: 5500107
    Abstract: A process for the inhibition of corrosion caused by naphthenic acid and sulfur compounds during the elevated temperature processing of crude oil by use of an aryl containing phosphite compound having one of the structures: ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are C.sub.6 to C.sub.12 and at least one R group is an aryl radical.
    Type: Grant
    Filed: March 15, 1994
    Date of Patent: March 19, 1996
    Assignee: Betz Laboratories, Inc.
    Inventor: James G. Edmondson
  • Patent number: 5500401
    Abstract: A method of selectively hydrodenitrogenating various raw hydrocarbon oils such as various petroleum feedstocks, coal liquids, shale oils and sand oils, which method comprises passing the raw hydrocarbon oil along with hydrogen (H.sub.2) over sulfided carbon supported Fe-Mo catalysts, whereby the raw hydrocarbon oil is hydrodenitrogenated with a selectivity significantly higher than that is possible with conventional alumina supported hydrotreating catalysts.
    Type: Grant
    Filed: November 21, 1994
    Date of Patent: March 19, 1996
    Assignee: Texaco Inc.
    Inventors: Chakka Sudhakar, Gerald G. Sandford, Frank Dolfinger, Jr.
  • Patent number: 5498808
    Abstract: Markers for petroleum products which can be detected upon addition of a developing reagent which provokes the marker to fluorescence.
    Type: Grant
    Filed: January 20, 1995
    Date of Patent: March 12, 1996
    Assignee: United Color Manufacturing, Inc.
    Inventor: Michael J. Smith
  • Patent number: 5498810
    Abstract: A process combination is disclosed to selectively upgrade naphtha to obtain products suitable for further upgrading to reformulated fuels. A naphtha feedstock is hydrogenated to saturate aromatics, followed by selective isoparaffin synthesis to yield light and heavy naphtha and isobutane; isobutane and isopentane in the product are obtained in superequilibrium concentrations. The heavy naphtha may be processed by reforming, light naphtha may be isomerized, and isobutane may be upgraded by dehydrogenation, etherification and/or alkylation to yield gasoline components from the process combination suitable for production of reformulated gasoline.
    Type: Grant
    Filed: August 19, 1994
    Date of Patent: March 12, 1996
    Assignee: UOP
    Inventors: Paula L. Bogdan, R. Joe Lawson, J. W. Adriaan Sachtler, Robert J. Schmidt
  • Patent number: 5498824
    Abstract: A method for preparing cuprous carboxylates (Cu(I) carboxylates) is provided wherein Cu(II) carboxylates are reacted with copper powder in an aromatic solvent under a reducing atmosphere, optionally in the presence of at least one of a carboxylic acid or carboxylic acid anhydride. Also, a method for preparing desired Cu(II) carboxylates is provided wherein a Cu(II) carboxylate having fewer carbon atoms is reacted with a carboxylic acid corresponding to the desired Cu(II) carboxylate. The invention method reactions achieve good conversions with rapid rates of reaction. The Cu(I) carboxylates produced according to the invention method are useful as reagents or in the preparation of olefin complexing reagents.
    Type: Grant
    Filed: November 1, 1994
    Date of Patent: March 12, 1996
    Assignee: Phillips Petroleum Company
    Inventors: Marvin M. Johnson, Gerhard P. Nowack, Ted H. Cymbaluk
  • Patent number: 5498815
    Abstract: A synthetic oil is made by a process comprising the steps of (a) reacting a vinylidene olefin in the presence of a catalyst to form an intermediate mixture which contains at least about 50 weight percent dimer of said vinylidene olefin, and (b) adding a vinyl olefin to said intermediate mixture and reacting said intermediate mixture and said vinyl olefin in the presence of a catalyst so as to form a product mixture which contains said dimer of said vinylidene olefin and a codimer of said added vinyl olefin with said vinylidene olefin.
    Type: Grant
    Filed: December 13, 1991
    Date of Patent: March 12, 1996
    Assignee: Albemarle Corporation
    Inventors: Robert A. Schaerfl, Jr., Ali M. Dadgar, Carroll W. Lanier