Patents Represented by Attorney Q. T. Dickinson
  • Patent number: 4944865
    Abstract: A process for cracking high metals content feedstocks which comprises contacting said feedstocks under catalytic cracking conditions with a novel catalytic cracking composition comprising a solid cracking catalyst and a magnesium oxide diluent.
    Type: Grant
    Filed: September 19, 1986
    Date of Patent: July 31, 1990
    Assignee: Chevron Research Company
    Inventors: Mario L. Occelli, James V. Kennedy
  • Patent number: 4889617
    Abstract: A process is disclosed for passivating sodium contaminants in FCC feed using tin or tin compounds.
    Type: Grant
    Filed: March 24, 1986
    Date of Patent: December 26, 1989
    Assignee: Chevron Research Company
    Inventor: Alan R. English
  • Patent number: 4869807
    Abstract: A fluid catalytic cracking unit equipped with multiple feed injection points along the length of the riser is operated such that portions of the same fresh feed are charged to different feed injection points. Preferably, the hydrocarbon fresh feed can be split into two or more non-distinct fractions, with one fraction charged to the bottom injection point along the length of the riser reactor, and the remaining fractions charged to injection points progressively higher up along the length of the riser reactor. Unconverted slurry oil boiling above 650.degree. F. can be recycled to one or more of the various injection points along the length of the riser.
    Type: Grant
    Filed: June 26, 1987
    Date of Patent: September 26, 1989
    Assignee: Chevron Research Company
    Inventor: Ashok S. Krishna
  • Patent number: 4857496
    Abstract: A process for the preparation of a dispersed Group VIB metal sulfide hydrocarbon oil hydroprocessing catalyst comprising reacting aqueous ammonia and a Group VIB metal compound, such as molybdenum oxide or tungsten oxide, to form water soluble compounds such as aqueous ammonium molybdates or tungstates. The aqueous ammonium molybdates or tungstates are sulfided at a relatively low temperature with hydrogen sulfide without feed oil. The slurry stream is then passed through a separator and ammonia is flashed and separated from the system, leaving a separator residue slurry. The separator residue slurry is then mixed with feed oil, hydrogen and hydrogen sulfide and sulfided at a relatively high temperature to produce a dispersed molybdenum sulfide or tungsten sulfide catalyst of high hydroprocessing activity. The catalyst slurry and feed oil can then be passed to a hydroprocessing reactor.
    Type: Grant
    Filed: December 15, 1986
    Date of Patent: August 15, 1989
    Assignee: Chevron Research Company
    Inventors: Jaime Lopez, Eugene A. Pasek
  • Patent number: 4853109
    Abstract: Dibasic carboxylic acids or salts thereof are used to remove metals, particularly calcium and iron, from hydrocarbonaceous feedstocks. An aqueous solution of the acid is used to extract the metals from the feedstock prior to processing. Oxalic acid is the preferred compound.
    Type: Grant
    Filed: March 7, 1988
    Date of Patent: August 1, 1989
    Assignee: Chevron Research Company
    Inventor: John G. Reynolds
  • Patent number: 4849534
    Abstract: A process for functionalizing methane comprising:(a) reacting methane with a hydridoalkyl metal complex of the formula:CpIr[P(R.sub.1).sub.3 ]H(R.sub.2)wherein Cp represents a cyclopentadienyl or alkylcyclopentadienyl radical having from 1 to 5 carbon atoms;Ir represents an iridium atom;P represents a phosphorus atom;R.sub.1 represents an alkyl group;R.sub.2 represents an alkyl group having at least two carbon atoms; andH represents a hydrogen atom, in the presence of a liquid alkane R.sub.3 H having at least three carbon atoms to form a hydridomethyl complex of the formula:CpIr[P(R.sub.1).sub.3 ]HMewhere Me represents a methyl radical.(b) reacting said hydridomethyl complex with an organic halogenating agent such as a tetrahalomethane or a haloform of the formulas:CX'X"X'"X"" or CHX'X"X'";wherein X', X", X"', and X"" represent halogens selected from bromine, iodine and chlorine, to halomethyl complex of step (a) having the formula:CpIr[P(R.sub.1).sub.
    Type: Grant
    Filed: February 21, 1985
    Date of Patent: July 18, 1989
    Inventors: Robert G. Bergman, J. Michael Buchanan, Jeffrey M. Stryker, Michael J. Wax
  • Patent number: 4789463
    Abstract: A process is disclosed for removing metals contaminants, particularly iron, and more particularly non-porphyrin, organically-bound iron compounds, from hydrocarbonaceous feedstock, particularly crude petroleum or residua. The process comprises mixing the feedstock with an aqueous solution of hydroxo-carboxylic acids or salts thereof, preferably citric acid, and separating the aqueous solution and metals from the demetalated feedstock.
    Type: Grant
    Filed: August 28, 1986
    Date of Patent: December 6, 1988
    Assignee: Chevron Research Company
    Inventor: John G. Reynolds
  • Patent number: 4784752
    Abstract: Poisoning of a cracking catalyst by contaminant metals such as nickel, vanadium and iron during fluid catalytic cracking of hydrocarbon charge stock containing the contaminant metals is suppressed by depositing minor amounts of a bismuth-containing passivating agent on the catalyst, desirably, a weight ratio of bismuth to nickel equivalents (nickel+0.2 vanadium+0.1 iron) of about 0.01:1 to about 1:1. The passivating agent can also comprise mixtures of compounds of bismuth and antimony, bismuth and tin.
    Type: Grant
    Filed: May 5, 1987
    Date of Patent: November 15, 1988
    Assignee: Chevron Research Company
    Inventors: Periaswamy Ramamoorthy, Ashok S. Krishna
  • Patent number: 4778591
    Abstract: A process is disclosed for removing metals contaminants, particularly calcium compounds, from hydrocarbonaceous feedstocks using aqueous carbonic acids, its salts, or mixtures thereof as the metals extraction agent. The hydrocarbonaceous layer and aqueous layers are then separated and the demetalated hydrocarbonaceous feedstock is removed for further processing.
    Type: Grant
    Filed: August 28, 1986
    Date of Patent: October 18, 1988
    Assignee: Chevron Research Company
    Inventor: John G. Reynolds
  • Patent number: 4778590
    Abstract: A process is disclosed for the removal of metals contaminants, particularly calcium, from hydrocarbonaceous feedstocks. The process comprises mixing the feedstock with an aqueous solution of a metals sequestering agent, particularly amino-carboxylic acids, their salts, or mixtures thereof, more particularly EDTA, and separating the aqueous solution containing the metals from the demetalated feedstock.
    Type: Grant
    Filed: August 28, 1986
    Date of Patent: October 18, 1988
    Assignee: Chevron Research Company
    Inventors: John G. Reynolds, Thomas F. Finger
  • Patent number: 4778592
    Abstract: A process is disclosed for the demetalation of organically-bound compounds of Group VIII metals, particularly iron, from hydrocarbonaceous feedstock. In the process, an aqueous solution of amino-carboxylic acid, or salts, particularly EDTA, is used to form complexes with the metals and extract them from the feedstock. The aqueous phase containing the complexed metals contaminants is then separated from the hydrocarbonaceous phase.
    Type: Grant
    Filed: August 28, 1986
    Date of Patent: October 18, 1988
    Assignee: Chevron Research Company
    Inventor: John G. Reynolds
  • Patent number: 4778589
    Abstract: A process is disclosed for the removal of metals contaminants, particularly calcium, from hydrocarbonaceous feedstocks. The process comprises mixing the feedstock with an aqueous solution of a metals sequestering agent, particularly hydroxocarboxylic acids, especially citric acid, then salts or mixtures thereof, and separating the aqueous solution containing the metals from the demetalated feedstock.
    Type: Grant
    Filed: August 28, 1986
    Date of Patent: October 18, 1988
    Assignee: Chevron Research Company
    Inventor: John G. Reynolds
  • Patent number: 4750988
    Abstract: Hydrocarbons containing vanadium are converted to lower boiling fractions employing a zeolitic cracking catalyst containing a significant concentration of a calcium-containing additive as a vanadium passivating agent.
    Type: Grant
    Filed: May 19, 1987
    Date of Patent: June 14, 1988
    Assignee: Chevron Research Company
    Inventors: Bruce R. Mitchell, Roger F. Vogel
  • Patent number: 4746760
    Abstract: Process for functionalizing saturated hydrocarbons comprising:(a) reacting said saturated hydrocarbons of the formula:R.sub.1 Hwherein H represents a hydrogen atom; and R.sub.1 represents a saturated hydrocarbon radical, with a metal complex of the formula:CpRh[P(R.sub.2).sub.3 ]H.sub.2whereinCp represents a cyclopentadienyl or alkylcyclopentadienyl radical;Rh represents a rhodium atom;P represents a phosphorus atom;R.sub.2 represents a hydrocarbon radical;H represents a hydrogen atom,in the presence of ultraviolet radiation to form a hydridoalkyl complex of the formula:CpRh[P(R.sub.2).sub.3 ](R.sub.1)H(b) reacting said hydridoalkyl complex with an organic halogenating agent such as a tetrahalomethane or a haloform of the formulas:CX'X''X'''X'''' or CHX'X''X'''wherein X', X'', X'", X"" represent halogens selected from bromine, iodine or chlorine atom, at a temperature in the range of about -60.degree. to -17.degree. C. to form the corresponding haloalkyl complex of step (a) having the formula:CpRhPMe.sub.
    Type: Grant
    Filed: February 21, 1985
    Date of Patent: May 24, 1988
    Assignee: Chevron Research Company
    Inventors: Robert G. Bergman, Andrew H. Janowicz, Roy A. Periana
  • Patent number: 4722783
    Abstract: Burned oil shale recycled as heat transfer solids in retorting process conditioned under reducing conditions with hydrocarbon to improve product yield.
    Type: Grant
    Filed: June 22, 1983
    Date of Patent: February 2, 1988
    Assignee: Chevron Research Company
    Inventors: Robert P. Sieg, P. Henrik Wallman, James R. Ouimette
  • Patent number: 4707461
    Abstract: Hydrocarbons containing vanadium are converted to lower boiling fractions employing a zeolitic cracking catalyst containing a significant concentration of a calcium-containing additive e.g. calcium corbonate dolomite and amorphous as a vanadium passivating calcium silicate agent.
    Type: Grant
    Filed: October 30, 1985
    Date of Patent: November 17, 1987
    Assignee: Chevron Research Company
    Inventors: Bruce R. Mitchell, Roger F. Vogel
  • Patent number: 4673133
    Abstract: A process for beneficiating oil shale is disclosed including the steps of grinding the shale to fine particles in an aqueous medium, portions of which are kerogen-rich and kerogen-poor, scrubbing the particles, separating the particles by either selectively flocculating out a fraction, redispersing the fraction and reseparating using froth flotation, or vice versa, and oil agglomerating/dewatering the kerogen-rich fraction.
    Type: Grant
    Filed: August 22, 1985
    Date of Patent: June 16, 1987
    Assignee: Chevron Research Company
    Inventors: Rabinder S. Datta, Frank F. Aplan, Charles Zebula
  • Patent number: 4667885
    Abstract: A process for grinding organic-containing mineral matter, particularly oil shale, is disclosed comprising a series of increasing finer grind-producing grinding steps, each followed by an organic beneficiation step. A portion of the organic-enhanced beneficiation product is mixed with each successive grinding step feed.
    Type: Grant
    Filed: August 22, 1985
    Date of Patent: May 26, 1987
    Assignee: Chevron Research Company
    Inventor: Rabinder S. Datta
  • Patent number: 4650564
    Abstract: A process for cracking high metals content feedstocks which comprises contacting said feedstocks under catalytic cracking conditions with a novel catalytic cracking composition comprising a solid cracking catalyst and an alumina diluent.
    Type: Grant
    Filed: September 17, 1984
    Date of Patent: March 17, 1987
    Assignee: Gulf Research & Development Company
    Inventors: Mario L. Occelli, James V. Kennedy
  • Patent number: 4624748
    Abstract: A novel catalyst system for use in a distillation column reactor is disclosed including annularly-defined spaces within the reactor comprised of vapor-permeable material with packed catalyst and alternately positioned vapor barrier means.
    Type: Grant
    Filed: June 29, 1984
    Date of Patent: November 25, 1986
    Assignee: Chevron Research Company
    Inventor: Willard M. Haunschild