Patents by Inventor Randall H. Petty

Randall H. Petty has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5549813
    Abstract: Disclosed is a fluid catalytic cracking process for cracking gas oils and naphtha which provides improved selectivity for C.sub.3 -C.sub.5 olefins employing a catalyst comprising a novel zeolite characterized by a large number of secondary pores, a substantially decreased Lattice Constant of below about 24.19 .ANG., and a substantially decreased Acid Site Density, attained by hydrothermal and acid-treating of an ultrastable Y-zeolite.
    Type: Grant
    Filed: March 7, 1994
    Date of Patent: August 27, 1996
    Inventors: Pei-Shing E. Dai, Chih-Hao M. Tsang, Laurence D. Neff, Randall H. Petty
  • Patent number: 5459118
    Abstract: Hydrodesulfurization of a cracked naphtha is effected in the presence of, as catalyst, an alkali metal, a metal of Group VIII, and a metal of Group VI-B on an alumina support containing a hydrotalcite-like composition.
    Type: Grant
    Filed: May 9, 1994
    Date of Patent: October 17, 1995
    Assignee: Texaco Inc.
    Inventors: Pei-Shing E. Dai, David E. Sherwood, Jr., Randall H. Petty
  • Patent number: 5453411
    Abstract: A mild hydrocracking process for the hydrodemetallation (HDM), hydrodesulfurization (HDS) and hydroconversion (HC) of hydrocarbon feedstocks such as residuum feedstocks which provides increased conversion of the 1000.degree. F.+ hydrocarbon fraction to the 1000.degree. F.- fraction and increased yields of middle distillates is disclosed. The process utilizes a catalyst comprising about 2.0 to about 6.0 wt. % of an oxide of a Group VIII metal, about 12.0 to about 25.0 wt. % of an oxide of molybdenum and 0 to about 3.0 wt. % of an oxide of phosphorus supported on a porous alumina support containing about 4.0 to about 30 wt. % of silica.
    Type: Grant
    Filed: February 22, 1994
    Date of Patent: September 26, 1995
    Assignee: Texaco Inc.
    Inventors: Pei-Shing E. Dai, Charles N. Campbell, II, Bobby R. Martin, Randall H. Petty
  • Patent number: 5441630
    Abstract: Hydrodesulfurization of a cracked naphtha is effected in the presence of, as catalyst, a non-noble metal of Group VIII and a metal of Group VI-B on an alumina support containing a hydrotalcite-like composition. The process of the instant invention gives high levels of hydrodesulfurization compared to prior art magnesia-containing catalysts and lower levels of olefin saturation, and less octane reduction in the desulfurized gasoline.
    Type: Grant
    Filed: April 12, 1993
    Date of Patent: August 15, 1995
    Assignee: Texaco, Inc.
    Inventors: Eugene P.-S. Dai, David E. Sherwood, Jr., Bobby R. Martin, Randall H. Petty
  • Patent number: 5391286
    Abstract: A process for catalytic hydrodewaxing hydrocarbon feedstocks is disclosed. The catalyst comprises a surface-modified crystalline aluminosilicate zeolite, such as ZSM-5 type zeolite in a matrix or binder, such as alumina, having a specified metals content. The process is especially useful for dewaxing lubricating oil basestocks.
    Type: Grant
    Filed: November 3, 1993
    Date of Patent: February 21, 1995
    Assignee: Texaco Inc.
    Inventors: Pei-Shing E. Dai, Robert J. Taylor, Jr., Randall H. Petty, Joseph A. Durkin
  • Patent number: 5332490
    Abstract: A process for hydrodewaxing a hydrocarbon feedstock boiling above about 350.degree. F. by contacting the feedstock and hydrogen at a hydrogen pressure of from about 300 to about 2000 psig at a temperature of 400.degree. to 900.degree. F. and at a space velocity of about 0.1 to about 10.0 LHSV with a catalyst comprising about 0.1 to about 23 wt. % of an oxide of a Group VIII metal, such as nickel, or an oxide of a Group VIB metal, such as molybdenum; supported on a porous alumina support containing about 50 to about 85 wt. % of a crystalline alumino-silicate zeolite of the ZSM-5 type based on the weight of the support. The catalyst is further characterized by having greater than 60% of the pore volume between 45-600 Angstroms in the 70-200 Angstrom range. The process is especially useful for dewaxing lubricating oil basestocks.
    Type: Grant
    Filed: September 28, 1992
    Date of Patent: July 26, 1994
    Assignee: Texaco Inc.
    Inventors: Robert J. Taylor, Jr., Pei-Shing E. Dai, Randall H. Petty, Joseph A. Durkin
  • Patent number: 5320743
    Abstract: A mild hydrocracking process for the hydrodemetallation (HDM), hydrodesulfurization (HDS) and hydroconversion (HC) of hydrocarbon feedstocks such as residuum feedstocks which provides increased conversion of the 1000.degree. F.+ hydrocarbon fraction to the 1000.degree. F.- fraction and increased yields of middle distillates is disclosed. The process utilizes a catalyst comprising about 2.0 to about 6.0 wt. % of an oxide of a Group VIII metal, about 12.0 to about 25.0 wt. % of an oxide of molybdenum and 0 to about 3.0 wt. % of an oxide of phosphorus supported on a porous alumina support containing about 4.0 to about 30 wt. % of silica.
    Type: Grant
    Filed: May 29, 1992
    Date of Patent: June 14, 1994
    Assignee: Texaco Inc.
    Inventors: Pei-Shing E. Dai, Charles N. Campbell II, Bobby R. Martin, Randall H. Petty
  • Patent number: 4941964
    Abstract: A process for the hydrotreatment of a sulfur and metal-containing hydrocarbon feed comprises contacting said feed with hydrogen and a catalyst in a manner such that the catalyst is maintained at isothermal conditions and is exposed to a uniform quality of feed, where said catalyst has a composition comprising 3.0-5.0 wt. % of an oxide of a Group VIII metal, 14.5-24.0 wt. % of an oxide of a Group VIB metal and 0-2.0 wt. % of an oxide of phosphorus supported on a porous alumina support, and said catalyst is further characterized by having a total surface area of 150-210 m.sup.2 /g and a total pore volume of 0.50-0.75 cc/g with a pore diameter distribution such that micropores having diameters of 100-160A constitute 70-85% of the total pore volume of said catalyst and macropores having diameters of greater than 250A constitute 5.5-22.0% of the total pore volume of said catalyst.
    Type: Grant
    Filed: March 14, 1988
    Date of Patent: July 17, 1990
    Assignee: Texaco Inc.
    Inventors: Pei-Shing E. Dai, David E. Sherwood, Jr., Burton H. Bartley, Randall H. Petty
  • Patent number: 4446010
    Abstract: A fluid catalytic cracking process for sulfur-containing petroleum charge stocks wherein sulfur contained in coke deposited on the fluidized cracking catalyst in the reactor is converted to sulfur oxides in the regenerator and removed from regenerator off-gases by incorporating a composite of alumina and bismuth oxides in a particulate cracking catalyst. Sulfur oxides produced during regeneration of the catalyst by burning the coke with air in the regenerator are captured by the alumina-bismuth oxides composite and converted to hydrogen sulfide in the cracking reactor. The hydrogen sulfide so produced is readily separated from petroleum products of the catalytic cracking reaction process.
    Type: Grant
    Filed: July 29, 1982
    Date of Patent: May 1, 1984
    Assignee: Texaco Inc.
    Inventors: Randall H. Petty, Burton H. Bartley
  • Patent number: 4414138
    Abstract: An active alumina composite and a cracking catalyst comprising the composite useful in hydrocarbon conversion processes. The composite and catalyst are particularly useful in fluid catalytic cracking processes, wherein sulfur-containing feedstock is subjected to catalytic conversion at a temperature in the range of about 800.degree. F. to about 1300.degree. F. in the presence of the catalyst which becomes sulfided during the conversion reaction and thereafter the catalyst is subjected to regeneration by burning sulfur-containing coke from the catalyst with an oxygen-containing gas at a temperature within the range of about 800.degree. to 1500.degree. F. The novel catalyst composition comprises 90 to 99 weight percent cracking catalyst and 1 to 10 weight percent of a composite of alumina and bismuth oxides containing 0.05 to 25 weight percent bismuth, calculated as the metal.
    Type: Grant
    Filed: June 2, 1982
    Date of Patent: November 8, 1983
    Assignee: Texaco Inc.
    Inventors: Randall H. Petty, Burton H. Bartley
  • Patent number: 4344926
    Abstract: Gaseous sulfur compounds are removed from a sulfur-containing gas mixture by reacting sulfur oxides in the gas mixture with alumina in association with bismuth.The process is particularly useful in fluid catalytic cracking of sulfur-containing petroleum charge stocks wherein sulfur is contained in coke deposited on the fluidized cracking catalyst. By the process of this invention, sulfur oxides may be removed from regenerator off-gases from a fluidized catalytic cracking unit by incorporating particulate alumina impregnated with bismuth in particulate cracking catalyst whereby sulfur oxides generated in the regeneration of the catalyst are reacted with bismuth-impregnated alumina. Sulfur oxides produced during regeneration of the catalyst by burning the coke with air are captured and converted to hydrogen sulfide in the cracking reactor. The hydrogen sulfide so produced is readily separated from petroleum products of the catalytic cracking reaction process.
    Type: Grant
    Filed: August 22, 1980
    Date of Patent: August 17, 1982
    Assignee: Texaco Inc.
    Inventors: Randall H. Petty, Burton H. Bartley