Patents Represented by Attorney Edward F. Kenehan, Jr.

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  • Process for oxidative conversion of methane to higher hydrocarbons using metal sulfide oxidizing agent
    Patent number: 5191138
    Abstract: There is provided a process for converting methane to hydrocarbons having at least two carbon atoms (i.e. higher hydrocarbons). The process involves oxidizing methane with a metal sulfide oxidizing agent. After this conversion of methane, the reduced metal sulfide may be regenerated by oxidation of the reduced metal sulfide.
    Type: Grant
    Filed: November 19, 1991
    Date of Patent: March 2, 1993
    Assignee: Mobil Oil Corp.
    Inventors: Scott Han, James N. Michaels, Robert E. Palermo, David L. Stern, Dennis E. Walsh
  • Molecular sieves coated with non-oxide ceramics for toluene disproportionation
    Patent number: 5191137
    Abstract: There is provided a molecular sieve coated with a non-oxide ceramic. The molecular sieve may be a zeolite, such as ZSM-5, and the ceramic coating may be, e.g., boron nitride. The coated molecular sieve may be prepared by contacting the molecular sieve with a ceramic precursor material comprising a thermally decomposable material, such as polyborazylene, and thermally decomposing this thermally decomposable material. The coated molecular sieves may be used as organic conversion catalysts. The non-oxide ceramic coating may alter or enhance the shape-selective properties of the molecular sieve by providing a diffusion barrier to molecules.
    Type: Grant
    Filed: April 27, 1992
    Date of Patent: March 2, 1993
    Assignee: Mobil Oil Corp.
    Inventor: Jeffrey S. Beck
  • Use of ZSM-57 in catalytic cracking for gasoline octane improvement and co-production of light olefins
    Patent number: 5183790
    Abstract: The catalytic cracking of a hydrocarbon oil to provide a product of increased octane number and increased light olefin content is carried out employing a cracking catalyst composition containing both a large port crystalline zeolite component and a ZSM-57 zeolite component.
    Type: Grant
    Filed: November 8, 1991
    Date of Patent: February 2, 1993
    Assignee: Mobil Oil Corp.
    Inventors: Girish K. Chitnis, Joseph A. Herbst, Ernest W. Valyocsik
  • Rare earth exchanged layered silicate catalysts
    Patent number: 5183559
    Abstract: There is provided a catalyst comprising a layered silicate, such as magadiite, containing interspathic polymeric silica which serves to prop open the layers. The catalyst further comprises rare earth cations which are exchanged with other cations in the silicate. It has been discovered that this rare earth cation exchange imparts enhanced hydrothermal stability to the catalyst. There is also provided a method for making this catalyst and a process for using this catalyst for cracking hydrocarbons. In the cracking process, the catalyst is regenerated.
    Type: Grant
    Filed: September 13, 1991
    Date of Patent: February 2, 1993
    Assignee: Mobil Oil Corp.
    Inventors: Garry W. Kirker, Thomas F. Degnan, Jr., Albin Huss, Jr., Michael E. Landis
  • Demetallation of hydrocarbon feedstocks with a synthetic mesoporous crystalline material
    Patent number: 5183561
    Abstract: There is provided a process for demetallizing hydrocarbon feedstocks, such as resids or shale oil. The process uses a catalyst comprising at least one hydrogenation metal, such as nickel and molybdenum, and an ultra-large pore oxide material. This ultra-large pore oxide material may have uniformly large pores, e.g., having a size of about 40 Angstroms in diameter.
    Type: Grant
    Filed: July 24, 1991
    Date of Patent: February 2, 1993
    Assignee: Mobil Oil Corp.
    Inventors: Charles T. Kresge, Michael E. Leonowicz, Wieslaw J. Roth, James C. Vartuli, Kathleen M. Keville, Stuart S. Shih, Thomas F. Degnan, Francis G. Dwyer, Michael E. Landis
  • Synthesis of large crystal size ZSM-5
    Patent number: 5182090
    Abstract: There is provided a method for making large crystal size ZSM-5. This method involves the use of two organic cations, specifically tetrapropylammonium (TPA) and tetramethylammonium (TMA) cations, in the reaction mixture. This method further involves the use of a source of deliberately added alumina, such as aluminum sulfate, in the reaction mixture.
    Type: Grant
    Filed: February 19, 1992
    Date of Patent: January 26, 1993
    Assignee: Mobil Oil Corp.
    Inventors: Francis G. Dwyer, Pochen Chu, William E. Cormier, Jr.
  • Synthesis of a synthetic porous crystalline material
    Patent number: 5173281
    Abstract: There is provided a method for preparing a synthetic crystalline material from a reaction mixture including an organic directing agent selected from 1,4-diazacycloheptane (i.e. homopiperazine), azacyclooctane (i.e. heptamethyleneimine), aminocyclohexane (i.e. cyclohexylamine), aminocyclopentane (i.e. cyclopentylamine) and aminocycloheptane (i.e. cycloheptylamine). The crystalline material may be an aluminosilicate zeolite having considerable catalytic activity, e.g. for hydrocarbon conversion reactions.
    Type: Grant
    Filed: October 7, 1991
    Date of Patent: December 22, 1992
    Assignee: Mobil Oil Corp.
    Inventors: Clarence D. Chang, Donna M. Mitko
  • Highly porous amorphous titania and titania/silica phases
    Patent number: 5162283
    Abstract: There is provided a highly porous amorphous titania or titania/silica material. The material may be prepared by gelling a reaction mixture comprising hydrolyzable titanium and optionally, hydrolyzable silicon compounds, such as titanium diisopropoxide (2,4-pentanedionate) and tetraethylorthosilicate, a nonaqueous solvent, such as ethanol, and water, followed by drying the gel. The titania or titania/silica material may be used as a catalyst, a catalyst support or a sorbent.
    Type: Grant
    Filed: January 22, 1991
    Date of Patent: November 10, 1992
    Assignee: Mobil Oil Corporation
    Inventor: Ahmad Moini
  • Zeolite synthesis using an alcohol or like molecules
    Patent number: 5160500
    Abstract: There is provided a method for preparing a zeolite other than ZSM-5 from a reaction mixture comprising a mixed organic directing agent which is a combination of (a) an organic nitrogen containing compound such as an amine or a quaternary ammonium compound and (b) an alcohol and/or diol. Particular zeolites synthesized by this method include ZSM-22 and ZSM-23. The use of an alcohol or a diol may inhibit the coformation of ZSM-5. Especially when used to prepare ZSM-23, this method enables the preparation of more catalytically active ZSM-23 of reduced crystallite size and also enables the use of lower crystallization temperatures. Particular mixed organic directing agents for the preparation of ZSM-23 are combinations of (a) pyrrolidine and (b) ethanol or ethylene glycol.
    Type: Grant
    Filed: October 30, 1991
    Date of Patent: November 3, 1992
    Assignee: Mobil Oil Corporation
    Inventors: Pochen Chu, Donald J. Klocke, David O. Marler, John P. McWilliams, James C. Vartuli
  • Modified crystalline aluminosilicate zeolite catalyst and its use in the production of lubes of high viscosity index
    Patent number: 5157191
    Abstract: The catalytic activity of a crystalline aluminosilicate zeolite having a Constraint Index of from about 1 to about 12 for a variety of hydrocarbon conversions including the oligomerization of olefins to provide high viscosity index lubes is significantly enhanced by modifying the catalyst to reduce surface acid sites. This is accomplished by contacting the zeolite with a fluorosilicate salt to extract surface zeolitic aluminum which is replaced by silicon.
    Type: Grant
    Filed: September 9, 1991
    Date of Patent: October 20, 1992
    Assignee: Mobil Oil Corp.
    Inventors: Emmerson Bowes, David S. Shihabi
  • Hydroisomerization process for pour point reduction of long chain alkyl aromatic compounds
    Patent number: 5157187
    Abstract: There is provided a method for reducing the pour point of an alkyl aromatic lube base stock by hydroisomerizing alkyl side groups on alkyl aromatic compounds. The alkyl aromatic, compounds may be alkylated naphthalenes. The hydroisomerization reaction may take place over a catalyst comprising zeolite beta and platinum.
    Type: Grant
    Filed: January 2, 1991
    Date of Patent: October 20, 1992
    Assignee: Mobil Oil Corp.
    Inventors: Quang N. Le, Stephen S. Wong
  • Vacancy titanates intercalated with cationic hydroxy aluminum complexes
    Patent number: 5155076
    Abstract: There is provided a vacancy titanate intercalated with a cationic hydroxy aluminum complex, such as Keggin ion. A method for making this material and a process for using this material as a catalyst are also provided.
    Type: Grant
    Filed: January 2, 1991
    Date of Patent: October 13, 1992
    Assignee: Mobil Oil Corp.
    Inventor: Ahmad Moini
  • Partial oxidation of methane over perovskite catalyst
    Patent number: 5149516
    Abstract: There is provided a process for the partial oxidation of methane to produce a product including carbon monoxide and hydrogen. The process involves contacting a source of methane and a source of oxygen with a perovskite catalyst, such as LaCoO.sub.3.
    Type: Grant
    Filed: October 15, 1990
    Date of Patent: September 22, 1992
    Assignee: Mobil Oil Corp.
    Inventors: Scott Han, Lorenzo C. DeCaul, Robert E. Palermo, Dennis E. Walsh
  • Catalyst comprising a hydrogenation metal and a delaminated layered silicate
    Patent number: 5137861
    Abstract: There is provided a catalyst comprising at least one hydrogenation metal, such as Ni and Mo, supported on a delaminated layered silicate, such as kenyaite, which has been swollen and calcined. There is also provided a method for making this catalyst. There is further provided a process for using this catalyst to demetalize a petroleum feedstock, such as a gas oil.
    Type: Grant
    Filed: January 22, 1991
    Date of Patent: August 11, 1992
    Assignee: Mobil Oil Corp.
    Inventors: Stuart S. Shih, James C. Vartuli
  • Removal of organic from pillared layered materials by acid treatment
    Patent number: 5137707
    Abstract: There is provided a method for the removal of residual organic swelling agent from pillared layered materials by treating such materials with acid.
    Type: Grant
    Filed: October 22, 1991
    Date of Patent: August 11, 1992
    Assignee: Mobil Oil Corp.
    Inventors: Brent A. Aufdembrink, Wieslaw J. Roth
  • Molecular sieves coated with non-oxide ceramics
    Patent number: 5120692
    Abstract: There is provided a molecular sieve coated with a non-oxide ceramic. The molecular sieve may be a zeolite, such as ZSM-5, and the ceramic coating may be, e.g., boron nitride. The coated molecular sieve may be prepared by contacting the molecular sieve with a ceramic precursor material comprising a thermally decomposable material, such as polyborazylene, and thermally decomposing this thermally decomposable material. The coated molecular sieves may be used as organic conversion catalysts. The non-oxide ceramic coating may alter or enhance the shape-selective properties of the molecular sieve by providing a diffusion barrier to molecules.
    Type: Grant
    Filed: February 4, 1991
    Date of Patent: June 9, 1992
    Assignee: Mobil Oil Corp.
    Inventor: Jeffrey S. Beck
  • Catalyst and process for upgrading methane to higher hydrocarbons
    Patent number: 5105044
    Abstract: There is provided a catalyst and a process for the direct partial oxidation of methane with oxygen, whereby hydrocarbons having at least two carbon atoms are produced. The catalyst used in this reaction is a spinel oxide, such as MgMn.sub.2 O.sub.4 or CaMn.sub.2 O.sub.4, modified with an alkali metal, such as Li or Na.
    Type: Grant
    Filed: October 15, 1990
    Date of Patent: April 14, 1992
    Assignee: Mobil Oil Corp.
    Inventors: Scott Han, Lorenzo C. DeCaul, Robert E. Palermo, Dennis E. Walsh
  • Sulfated layered titanium oxide catalysts in process for preparing long chain alkyl aromatic compounds
    Patent number: 5105042
    Abstract: There is provided a sulfated layered titanium oxide catalyst. Relatively long chain alkyl aromatic compounds are prepared by alkylating an alkylatable aromatic compound with a relatively long chain alkylating agent under alkylation reaction conditions in the presence of this sulfated layered material as alkylation catalyst. The layered material contains titanium oxide in the layers and oxide pillars separating the layers. The alkylation activity of the catalyst is increased by including sulfate ions in the layered material. This increased alkylation activity may be obtained by contacting the layered material with an aqueous solution of a sulfate compound such as sulfuric acid.
    Type: Grant
    Filed: November 21, 1990
    Date of Patent: April 14, 1992
    Assignee: Mobil Oil Corp.
    Inventors: Brent A. Aufdembrink, Charles T. Kresge, Quang N. Le, Joosup Shim, Stephen S. Wong
  • Use of SZM-57 in catalytic cracking for gasoline octane improvement and co-production of light olefins
    Patent number: 5098555
    Abstract: The catalytic cracking of a hydrocarbon oil to provide a product of increased octane number and increased light olefin content is carried out employing a cracking catalyst composition containing both a large pore crystalline zeolite component and a ZSM-57 zeolite component.
    Type: Grant
    Filed: January 24, 1991
    Date of Patent: March 24, 1992
    Assignee: Mobil Oil Corp.
    Inventors: Girish K. Chitnis, Joseph A. Herbst, Ernest W. Valyocsik
  • Modified crystalline aluminosilicate zeolite catalyst and its use in the production of lubes of high viscosity index
    Patent number: 5080878
    Abstract: The catalytic activity of a crystalline aluminosilicate zeolite having a Constraint Index of from about 1 to about 12 for a variety of hydrocarbon conversions including the oligomerization of olefins to provide high viscosity index lubes is significantly enhanced by modifying the catalyst to reduce surface acid sites. This is accomplished by contacting the zeolite with a fluorosilicate salt to extract surface zeolite aluminum which is replaced by silicon.
    Type: Grant
    Filed: May 14, 1990
    Date of Patent: January 14, 1992
    Assignee: Mobil Oil Corp.
    Inventors: Emmerson Bowes, David S. Shihabi