Patents Represented by Attorney R. H. Davies
  • Patent number: 4332672
    Abstract: Sulfur oxides are removed from flue gas in a catalyst regenerator in a fluid catalyst cracking system while liquid-hydrocarbon product yield from the system is maintained at a high level by heating a nonzeolitic, silica-containing catalyst to 800.degree.-1500.degree. F.; impregnating 0.1 to 25 weight percent aluminum onto the catalyst particles; and cycling the resulting particles through the cracking reactor and catalyst regenerator in the cracking system, the impregnated catalyst being particularly adaptable for cracking heavy, metals-containing feeds such as residua.
    Type: Grant
    Filed: July 10, 1978
    Date of Patent: June 1, 1982
    Assignee: Chevron Research Company
    Inventors: William A. Blanton, Jr., Robert L. Flanders
  • Patent number: 4268376
    Abstract: A process is disclosed for cracking hydrocarbons with a faujasite-type zeolite catalyst, in which the catalyst is rejuvenated by ion-exchange with rare earth metal cations to restore its activity.
    Type: Grant
    Filed: March 23, 1979
    Date of Patent: May 19, 1981
    Assignee: Chevron Research Company
    Inventor: Michael S. Foster
  • Patent number: 4259976
    Abstract: Disclosed is an improved method for the recovery and transportation of the chemical and energy value of light hydrocarbons. Light, normally gaseous hydrocarbons are converted to methanol and mixed with a viscous hydrocarbon for transport in a pipeline.
    Type: Grant
    Filed: October 20, 1977
    Date of Patent: April 7, 1981
    Assignee: Chevron Research Company
    Inventor: George D. Gould
  • Patent number: 4244922
    Abstract: In an apparatus for contacting fluid with subdivided contact material, such as a radial-flow catalytic reactor, means having a substantially horizontal surface is attached to a lower portion of a vertically movable member within the reactor, the member being selected from center pipes and particle-retaining screens. The weight of contact material on the means restrains upward movement of the member during temperature cycling, and thus prevents problems caused by the upward movement.
    Type: Grant
    Filed: September 5, 1978
    Date of Patent: January 13, 1981
    Assignee: Chevron Research Company
    Inventors: Ben G. Burke, Douglas J. Legg
  • Patent number: 4243556
    Abstract: In removing sulfur oxides from flue gas in a cracking catalyst regenerator in the presence of a silica-containing particulate catalyst by reacting the sulfur oxides with alumina in a particulate solid other than the catalyst, activity loss in the alumina as a result of migration of silica from the catalyst particles to the alumina-containing particles is lessened by using alumina-containing particles which contain sodium, manganese or phosphorus.
    Type: Grant
    Filed: December 4, 1978
    Date of Patent: January 6, 1981
    Assignee: Chevron Research Company
    Inventor: William A. Blanton, Jr.
  • Patent number: 4241231
    Abstract: Isomerizable light paraffinic hydrocarbon feeds are isomerized in an improved process using a particular super-chlorided reforming catalyst under isomerizing conditions. A chloride source in the feed stabilizes the catalyst. This process provides for a material octane improvement of the feed without excessive loss thereof to normally gaseous hydrocarbons.
    Type: Grant
    Filed: October 2, 1978
    Date of Patent: December 23, 1980
    Assignee: Chevron Research Company
    Inventors: Kirk R. Gibson, Robert L. Jacobson, Manfred J. Michlmayr
  • Patent number: 4239742
    Abstract: A process is provided for adsorbing sulfur dioxide impurity from an impure gas and producing a hydrogen sulfide-rich gas. In the process, a first adsorbate containing oxidized sulfur is produced by contacting the impure gas with an adsorbent comprising a composite of an alumina support and sodium and vanadium oxides. A second adsorbate containing reduced sulfur is produced by contacting said first adsorbate with carbon monoxide. A gas rich in hydrogen sulfide is then produced by contacting said second adsorbate with water vapor at a temperature in the range 120.degree. C. to 815.degree. C.
    Type: Grant
    Filed: June 26, 1978
    Date of Patent: December 16, 1980
    Assignee: Chevron Research Company
    Inventor: William A. Blanton, Jr.
  • Patent number: 4238372
    Abstract: An improved catalyst, having a reduced fouling rate when used in a catalytic reforming process, said catalyst comprising platinum disposed on an alumina support wherein the alumina support is obtained by removing water from aluminum hydroxide produced as a by-product from a Ziegler higher alcohol synthesis reaction, and wherein the alumina is calcined at a temperature of 1100.degree.-1400.degree. F. so as to have a surface area of 165 to 215 square meters per gram.
    Type: Grant
    Filed: May 4, 1979
    Date of Patent: December 9, 1980
    Assignee: Chevron Research Company
    Inventors: Waldeen C. Buss, Harris E. Kluksdahl
  • Patent number: 4224191
    Abstract: A porous sulfur sorbent, especially useful for removing residual H.sub.2 S and mercaptans from reformer feed streams, prepared by peptizing an alumina with acid, mulling the peptized alumina with a copper compound to form an extrudable dough, extruding the dough, and drying and calcining the extrudate.
    Type: Grant
    Filed: March 5, 1979
    Date of Patent: September 23, 1980
    Assignee: Chevron Research Company
    Inventor: Keith C. Bishop, III
  • Patent number: 4222854
    Abstract: Production of motor gasoline and a BTX-enriched reformate by fractionating a naphtha feedstock into a mid-boiling BTX-precursor fraction, a relatively high-boiling fraction and a relatively low-boiling fraction; catalytically reforming the BTX-precursor fraction in a first reforming zone; combining the relatively high-boiling and low-boiling fractions and catalytically reforming the combined fractions in a second reforming zone.
    Type: Grant
    Filed: May 23, 1979
    Date of Patent: September 16, 1980
    Assignee: Chevron Research Company
    Inventors: Frederick H. Vorhis, Jr., Keith C. Bishop, III
  • Patent number: 4207185
    Abstract: A method for separating a first liquid from a mixture with a second liquid or particulate solid by a series of froth flotation and froth separation stages is improved by recycling a portion of the mixture recovered upstream of the last flotation stage to an initial or an intermediate stage further upstream from the point where the recycled liquid is obtained.
    Type: Grant
    Filed: October 25, 1978
    Date of Patent: June 10, 1980
    Assignee: Chevron Research Company
    Inventor: Robert J. Hinds
  • Patent number: 4204944
    Abstract: Carbon monoxide and sulfur oxides are removed from catalyst regenerator flue gas in an FCC system using a nonzeolitic cracking catalyst and sulfur from the flue gas is shifted to form hydrogen sulfide, which is recovered in the gases removed from the cracking reactor in the system by reacting carbon monoxide in the regenerator flue gas with oxygen in contact with a particulate carbon monoxide combustion promoter, reacting sulfur oxides in the regenerator flue gas with particulate alumina physically mixed with the nonzeolitic catalyst to form a sulfur-containing solid, and forming hydrogen sulfide in the cracking reactor by contacting the sulfur-containing solid with the hydrocarbon feed.
    Type: Grant
    Filed: July 10, 1978
    Date of Patent: May 27, 1980
    Assignee: Chevron Research Company
    Inventors: Robert L. Flanders, William A. Blanton, Jr.
  • Patent number: 4205050
    Abstract: In a gas purification process wherein hydrogen sulfide is adsorbed by an alkanolamine solution in an absorption zone and desorbed in a regenerating column, the improvement comprising reducing corrosion in the overhead section of the column by introducing into the overhead section of the regenerating column an effective amount of ammonia scrubber bottoms liquid.
    Type: Grant
    Filed: June 17, 1976
    Date of Patent: May 27, 1980
    Assignee: Chevron Research Company
    Inventors: Robert L. Piehl, W. Bertram Scarborough
  • Patent number: 4204947
    Abstract: Thiol impurities are absorbed and removed from hydrocarbon oils by contacting the oil in the absence of molecular oxygen with a scavenger at a temperature in the range of about 120.degree. to 400.degree. C. The scavenger is a composite having a copper component and an inorganic porous carrier component and having a surface area in the range 20 to 1000 square meters per gram. The contacting must be discontinued when the thiol impurity content of the effluent product exceeds about 0.3 ppm.
    Type: Grant
    Filed: June 12, 1978
    Date of Patent: May 27, 1980
    Assignee: Chevron Research Company
    Inventors: Robert L. Jacobson, Kirk R. Gibson
  • Patent number: 4204945
    Abstract: Carbon monoxide and sulfur oxides are removed from flue gas produced in a catalyst regenerator in an FCC system and sulfur from the flue gas is shifted to form hydrogen sulfide, which is recovered in the gases removed from the cracking reactor in the system by introducing sufficient molecular oxygen into the catalyst regenerator to provide an atmosphere therein having a molecular oxygen concentration of at least 0.1 volume percent, reacting carbon monoxide in the regenerator flue gas with oxygen in contact with a particulate carbon monoxide combustion promoter physically admixed with the cracking catalyst, reacting sulfur oxides in the regenerator flue gas with silica-free alumina included as a discrete phase in the FCC catalyst to form a sulfur-containing solid in the catalyst, and forming hydrogen sulfide in the cracking reactor by contacting the sulfur-containing solid with the hydrocarbon feed.
    Type: Grant
    Filed: July 10, 1978
    Date of Patent: May 27, 1980
    Assignee: Chevron Research Company
    Inventors: Robert L. Flanders, William A. Blanton, Jr.
  • Patent number: 4201658
    Abstract: A product useful as a pour point depressant which comprises the asphaltene component of a thermally treated shale oil is disclosed, as is a process for making it, a method for using it and a concentrate and a composition containing it.
    Type: Grant
    Filed: March 29, 1978
    Date of Patent: May 6, 1980
    Assignee: Chevron Research Company
    Inventor: Harbo P. Jensen
  • Patent number: 4199432
    Abstract: A continuous process is disclosed for the retorting of shale and other similar hydrocarbon-containing solids of a broad particle size distribution in which the solids to be retorted are introduced into an upper portion of an elongated vessel with a solid heat transfer material at an elevated temperature. The hydrocarbon-containing solids and heat transfer material, a portion of each being fluidized, pass downwardly through the retort under substantially plug-flow conditions, countercurrent to an upwardly flowing stripping gas. Retorted solids and heat transfer material are withdrawn from the bottom of the retort vessel and a product stream of hydrocarbon vapors mixed with stripping gas is recovered overhead.
    Type: Grant
    Filed: March 22, 1978
    Date of Patent: April 22, 1980
    Assignee: Chevron Research Company
    Inventors: Paul W. Tamm, Gordon E. Langlois
  • Patent number: 4199435
    Abstract: The amount of NO.sub.x formed during regeneration of a cracking catalyst in the presence of a metallic carbon monoxide combustion catalyst is decreased without substantially adversely affecting the carbon monoxide combustion activity of the promoter by subjecting the combustion-promoting catalyst to steam treatment prior to employing it in the cracking catalyst regeneration operation.
    Type: Grant
    Filed: December 4, 1978
    Date of Patent: April 22, 1980
    Assignee: Chevron Research Company
    Inventors: Donald O. Chessmore, Charles E. Rudy, Jr.
  • Patent number: 4196175
    Abstract: A process is provided for removing a bisulfite salt from an aqueous solution by chemisorbing the salt onto a macroreticular organic compound containing carbonyl functional groups and regenerating the compound.
    Type: Grant
    Filed: November 13, 1978
    Date of Patent: April 1, 1980
    Assignee: Chevron Research Company
    Inventor: Harbo P. Jensen
  • Patent number: 4192736
    Abstract: Indigenous metal impurities in an oil are removed by contacting the oil with a novel solid consisting essentially of porous alumina containing a minor amount of phosphorus. The contacting is carried out under oil demetallizing conditions.
    Type: Grant
    Filed: November 29, 1978
    Date of Patent: March 11, 1980
    Assignee: Chevron Research Company
    Inventor: Harris E. Kluksdahl