Patents Examined by Cynthia A. Prezlock
  • Conversion of methanol to hydrocarbons
    Patent number: 4513161
    Abstract: A process wherein methanol is contacted, in the presence of hydrogen, over a ruthenium-titania catalyst to produce, at reaction conditions, an admixture of C.sub.10 + linear paraffin and olefins, which can be further refined and upgraded to high quality middle distillate fuels, and other valuable products such as mogas, diesel fuel, jet fuel, lubes, and specialty solvents, especially premium middle distillate fuels of carbon number ranging from about C.sub.10 to C.sub.20.
    Type: Grant
    Filed: June 29, 1984
    Date of Patent: April 23, 1985
    Assignee: Exxon Research and Engineering Co.
    Inventor: Charles H. Mauldin
  • Hydrocarbon dehydrogenation
    Patent number: 4511754
    Abstract: A method for dehydrogenating dehydrogenatable hydrocarbons which comprises contacting hydrocarbon with an oxide of Tb having combined therewith an amount of alkali and/or alkaline earth metal which is sufficient to improve the selectivity to dehydrogenated hydrocarbon products. The oxide is reduced by the contact which is carried at about 500.degree. to 1000.degree. C. Reducible oxides of Tb are regenerated by oxidizing the reduced composition with molecular oxygen. Solids prepared from the oxide Tb.sub.4 O.sub.7 are particularly effective in the process.
    Type: Grant
    Filed: April 16, 1984
    Date of Patent: April 16, 1985
    Assignee: Atlantic Richfield Company
    Inventor: Anne M. Gaffney
  • Process for the hydroisomerization of paraffins
    Patent number: 4511752
    Abstract: A process is disclosed for the preparation of a more active paraffin hydrocarbon hydroisomerization catalyst from synthetic mica montmorillonite, preferably a nickel synthetic mica montmorillonite catalyst, which may also contain palladium, by treating the catalyst with one or more compounds comprising chlorine which can further release one or more protons and/or hydrogen chloride, and preferably by treating with hydrochloric acid.
    Type: Grant
    Filed: April 20, 1983
    Date of Patent: April 16, 1985
    Assignee: Shell Oil Company
    Inventor: Jacobus J. L. Heinerman
  • Method for minimizing fouling of heat exchanger
    Patent number: 4511457
    Abstract: Hydrocarbon processing equipment is protected against fouling during the processing of hydrocarbons at elevated temperatures by adding to the equipment small amounts of the N,N'-dimer of phenothiazine and at least one mono- or ditertiary alkyl catechol and/or at least one mono- or ditertiary alkylhydroquinone.
    Type: Grant
    Filed: August 10, 1984
    Date of Patent: April 16, 1985
    Assignee: Atlantic Richfield Company
    Inventors: Richard F. Miller, Michael P. Nicholson
  • Conversion of methanol to toluene using amorphous silica-alumina catalysts
    Patent number: 4511749
    Abstract: Amorphous silica-alumina catalysts, having a layer of an aluminum compound chemically bonded onto the surface of a silica xerogel and having protons as the electrical charge balancing species, have been found to give surprising selectivity in the conversion of water/methanol mixtures to toluene.
    Type: Grant
    Filed: November 22, 1983
    Date of Patent: April 16, 1985
    Assignee: Coal Industry Patents Limited
    Inventors: Joseph G. Robinson, Pierce W. F. Riemer
  • Method for minimizing fouling of heat exchanger
    Patent number: 4510041
    Abstract: Hydrocarbon processing equipment is protected against fouling during the processing of hydrocarbons at elevated temperatures by adding to the equipment small amounts of at least one N,N'-dimer of phenothiazine or a substituted phenothiazine and at least one mono- or ditertiary alkylphenol.
    Type: Grant
    Filed: August 10, 1984
    Date of Patent: April 9, 1985
    Assignee: Atlantic Richfield Company
    Inventors: Richard F. Miller, Michael P. Nicholson
  • Conversions of low molecular weight hydrocarbons to higher molecular weight hydrocarbons using a boron compound containing catalyst
    Patent number: 4507517
    Abstract: Disclosed is a catalytic process for the production of higher molecular weight hydrocarbons from lower molecular weight hydrocarbons. More particularly, disclosed is a catalytic process for the conversion of methane to C.sub.2 + hydrocarbons, particularly hydrocarbons rich in ethylene or benzene, or both. The process utilizes a boron compound containing catalyst, high reaction temperature of greater than 1000.degree. C., and a high gas hourly space velocity of greater than 3200 hr.sup.-1.
    Type: Grant
    Filed: October 31, 1983
    Date of Patent: March 26, 1985
    Assignee: Chevron Research Company
    Inventors: Louis Devries, P. R. Ryason
  • Passivation of metal contaminants in cat cracking
    Patent number: 4504380
    Abstract: A method for passivating metal contaminants present in a hydrocarbon feedstock which become deposited on cracking catalyst is described. The method is directed at passing the cracking catalyst through a passivation zone having a reducing atmosphere maintained at an elevated temperature by the introduction of a process reducing gas. The unsaturated hydrocarbon content of the reducing gas is decreased prior to the introduction of the process reducing gas into the passivation zone to thereby lower the rate of coke formation. In a preferred embodiment process reducing gas is passed through a hydrogenation zone adapted to hydrogenate an unsaturated hydrocarbon present in the process reducing gas prior to the process reducing gas being added to the passivation zone.
    Type: Grant
    Filed: August 23, 1983
    Date of Patent: March 12, 1985
    Assignee: Exxon Research and Engineering Co.
    Inventors: Gordon F. Stuntz, Terry A. Reid
  • Passivation of metal contaminants in cat cracking
    Patent number: 4504379
    Abstract: A method for passivating metal contaminants present in a hydrocarbon feedstock which become deposited on cracking catalyst is described. The method is directed at passing the cracking catalyst through a passivation zone having a reducing atmosphere maintained at an elevated temperature. The reducing atmosphere comprises a process reducing gas stream which has been passed through a guard bed adapted to selectively remove an unsaturated hydrocarbon prior to the process reducing gas being added to the passivation zone.
    Type: Grant
    Filed: August 23, 1983
    Date of Patent: March 12, 1985
    Assignee: Exxon Research and Engineering Co.
    Inventors: Gordon F. Stuntz, Robert C. Schucker
  • Organophosphorus-treated zeolite catalysts for para-selective aromatics conversion
    Patent number: 4504690
    Abstract: A method is provided for treating modified ZSM-5 type zeolite catalysts with a vapor phase organophosphorus reagent such as trimethylphosphite or dimethylmethylphosphonate in order to improve the para-selective properties of such catalysts for the conversion of aromatic materials. The modified zeolites so treated are those which contain a minor proportion of a difficultly reducible oxide such as magnesium oxide, calcium oxide and/or phosphorus oxide. Such catalyst compositions can be used in alkylation, transalkylation or disproportionation processes to provide alkylated aromatic product mixtures having exceptionally high concentrations of the para-dialkylbenzene isomer.
    Type: Grant
    Filed: May 25, 1984
    Date of Patent: March 12, 1985
    Assignee: Mobil Oil Corporation
    Inventors: Nancy P. Forbus, Warren W. Kaeding
  • Methane conversion
    Patent number: 4499324
    Abstract: A method for synthesizing hydrocarbons from a methane source which comprises contacting methane with an oxide of Ce having combined therewith an amount of alkali and/or alkaline earth metal which is sufficient to improve the selectivity to higher hydrocarbon products. The oxide is reduced by the contact which is carried at about 500.degree. to 1000.degree. C. Reducible oxides of Ce are regenerated by oxidizing the reduced composition with molecular oxygen. The oxide CeO.sub.2 is particularly effective in the process.
    Type: Grant
    Filed: April 16, 1984
    Date of Patent: February 12, 1985
    Assignee: Atlantic Richfield Company
    Inventor: Anne M. Gaffney
  • Methane conversion
    Patent number: 4499323
    Abstract: A method for synthesizing hydrocarbons from a methane source which comprises contacting methane with an oxide of Pr having combined therewith an amount of alkali and/or alkaline earth metal which is sufficient to improve the selectivity to higher hydrocarbon products. The oxide is reduced by the contact which is carried at about 500.degree. to 1000.degree. C. Reducible oxides of Pr are regenerated by oxidizing the reduced composition with oxygen. The oxide Pr.sub.6 O.sub.11 is particularly effective in the process.
    Type: Grant
    Filed: April 16, 1984
    Date of Patent: February 12, 1985
    Assignee: Atlantic Richfield Company
    Inventor: Anne M. Gaffney
  • Methane conversion
    Patent number: 4499322
    Abstract: An improved method for converting methane to higher hydrocarbon products by contacting a gas comprising methane and an oxidative synthesizing agent at synthesizing conditions, the improvement which comprises contacting methane with an oxidative synthesizing agent containing a promoting amount of alkali metal and/or compounds thereof. Sodium is a particularly effective promoter. Stability of the promoted contact agent is enhanced by the presence of phosphorus.
    Type: Grant
    Filed: August 12, 1983
    Date of Patent: February 12, 1985
    Assignee: Atlantic Richfield Company
    Inventors: C. Andrew Jones, John A. Sofranko
  • Two-region spherical catalysts
    Patent number: 4495308
    Abstract: A spherical catalyst for hydroprocessing hydrocarbonaceous feedstocks. The catalyst consists of an inner region having less than 5% of its port volume contributed by macropores and having between 5 and 30 weight percent total catalytic metals, and an outer region characterized by having more than 10% of its pore volume contributed by macropores and having between 1 and 15 weight percent catalytic metals. A method of preparation of the catalyst is also disclosed.
    Type: Grant
    Filed: February 14, 1984
    Date of Patent: January 22, 1985
    Assignee: Chevron Research Company
    Inventor: Kirk R. Gibson
  • Methane conversion
    Patent number: 4495374
    Abstract: An improved method for converting methane to higher hydrocarbon products by contacting a gas comprising methane and an oxidative synthesizing agent under systhesis conditions, the improvement which comprises contacting methane with an oxidative synthesizing agent containing a promoting amount of alkaline earth metal and/or compounds thereof. Magnesium is a particularly effective promoter. Stability of the promoted contact agent is enhanced by the presence of phosphorus.
    Type: Grant
    Filed: August 12, 1983
    Date of Patent: January 22, 1985
    Assignee: Atlantic Richfield Company
    Inventors: C. A. Jones, John A. Sofranko
  • Catalyst for combustion at low temperatures and process for producing same
    Patent number: 4491640
    Abstract: This invention relates to a low-temperature combustion catalyst comprising a layer of an inorganic fiber having fine pores and rhodium deposited therein and to a process for preparing a low-temperature combustion catalyst comprising the steps of bringing a layer of an inorganic fiber having fine pores into contact with a rhodium compound solution while circulating the solution and drying the layer in air, and concerns with a low-temperature catalytic combustion burner including such catalyst.
    Type: Grant
    Filed: July 26, 1982
    Date of Patent: January 1, 1985
    Assignee: Osaka Gas Company Limited
    Inventors: Hiroki Sadamori, Akio Chikazawa, Setsuo Okamura, Chikako Noda
  • Catalyst and process for dehydrating 2-alcohols
    Patent number: 4490567
    Abstract: Novel catalysts are disclosed for the selective dehydration of 2-alcohols to .alpha.-olefins. In one case, the catalyst comprises at least one catalytic metal oxide on a low surface area aluminum oxide-containing support. In another case, the catalyst comprises a mixture of thorium oxide and cerium oxide on a base treated aluminum oxide containing support. There is also disclosed a novel process for obtaining high purity 4-methyl-1-pentene involving the dehydration of 4-methyl-2-pentanol followed by disproportionation with ethylene.
    Type: Grant
    Filed: April 8, 1982
    Date of Patent: December 25, 1984
    Assignee: Phillips Petroleum Company
    Inventor: Charles A. Drake
  • Methane conversion
    Patent number: 4489215
    Abstract: A method for synthesizing hydrocarbons from a methane source which comprises contacting methane with an oxide of Ru having combined therewith an amount of alkali and/or alkaline earth metal which is sufficient to improve the selectivity to higher hydrocarbon products. The oxide is reduced by the contact which is carried at about 500.degree. to 1000.degree. C. Reducible oxides of Ru are regenerated by oxidizing the reduced composition with oxygen. Bulk ruthenium oxides promoted by sodium and/or compounds thereof are particularly preferred contact solids.
    Type: Grant
    Filed: April 16, 1984
    Date of Patent: December 18, 1984
    Assignee: Atlantic Richfield Company
    Inventor: Howard P. Withers
  • Process for purifying hydrocarbonaceous oils
    Patent number: 4485007
    Abstract: A process for purifying hydrocarbonaceous oils containing heteroatom sulfur and heteroatom nitrogen compound impurities comprising the steps of:(1) reacting said hydrocarbonaceous oil with an oxidizing gas containing at least one nitrogen oxide with more than one oxygen atom for each nitrogen atom while maintaining(a) the molar ratio of the nitrogen oxide to the total of the sulfur heteroatom content and the nitrogen heteroatom content to about 1.5:1 or less,(b) the reaction time to about one hour or less,(c) the temperature to about 100.degree. C.
    Type: Grant
    Filed: June 15, 1982
    Date of Patent: November 27, 1984
    Assignee: Environmental Research and Technology Inc.
    Inventors: Patrick S. Tam, James R. Kittrell
  • Process for the production of slugs of pyrogenically produced oxides
    Patent number: 4482642
    Abstract: Pressed objects (slugs) of pyrogenically produced oxides such as SiO.sub.2, Al.sub.2 O.sub.3 and TiO.sub.2 are produced using a silica sol and water. As molding assistants thereby there is employed a polyhydric alcohol, e.g. glycerine or sorbitol. The water can be added adsorbed on a pyrogenically produced hydrophobized silica. The pressed object obtained can be used inter alia as catalyst carrier.
    Type: Grant
    Filed: August 9, 1982
    Date of Patent: November 13, 1984
    Assignee: Degussa Aktiengesellschaft
    Inventors: Manfred Ettlinger, Horst Ferch, Detlev Koth, Edgar Simon