Patents by Inventor David E. Sherwood, Jr.
David E. Sherwood, Jr. 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: 5616530Abstract: Disclosed is a catalyst comprising a porous alumina support bearing 2.5-6 wt % of a non-cobalt Group VIII metal oxide, 14.5-25 wt % of a Group VI-B metal oxide, and 0-4 wt % of a phosphorus oxide, said catalyst having a Total Surface Area of 240-320 M.sup.2 /g, Pore Volume of 0.65-0.90 cc/g, and a Pore Diameter Distribution whereby 50-62.8% of the Total Pore Volume is present as micropores of diameter 55-115 .ANG., 27.5-37% of the Total Pore Volume is present in large pores of a diameter greater than 160 .ANG. and 20-30.5% of the Total Pore Volume is present as macropores of diameter greater than 250 .ANG..Type: GrantFiled: November 29, 1995Date of Patent: April 1, 1997Assignee: Texaco Inc.Inventors: David E. Sherwood, Jr., Pei-Shing E. Dai, Charles N. Campbell, II
-
Patent number: 5545602Abstract: Heavy hydrocarbons are hydrotreated to increase content of components boiling below 1000.degree. F. by contact with Group VIII non-noble metal oxide and Group VI-B metal oxide on alumina having a Total Surface Area of 150-240 m.sup.2 /g, a Total Pore Volume, (TPV) of 0.7-0.98, and a Pore Diameter Distribution whereby .ltoreq.20% of the TPV is present as primary micropores of diameter .ltoreq.100 .ANG., at least about 34% of TPV is present as secondary micropores of diameter of about 100 .ANG.-200 .ANG., and about 26%-46% of the TPV is present as mesopores of diameter .gtoreq.200 .ANG..Type: GrantFiled: April 20, 1995Date of Patent: August 13, 1996Assignee: Texaco Inc.Inventors: Gerald V. Nelson, Govanon Nongbri, Roy E. Pratt, David E. Sherwood, Jr., Pei-Shing E. Dai
-
Patent number: 5534135Abstract: 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 is attained by hydrothermal and acid-treating of an ultrastable Y-zeolite.Type: GrantFiled: March 7, 1994Date of Patent: July 9, 1996Assignee: ABB Lummus Global Inc.Inventors: Pei-Shing E. Dai, David E. Sherwood, Jr., Burton H. Bartley
-
Patent number: 5514273Abstract: Heavy oils may be hydrotreated in the presence of a porous alumina support bearing metals of Group VIII, excluding cobalt, and VI-B and optionally phosphorus, the catalyst having a Total Surface Area of 240-320 m.sup.2 /g, a Total Pore Volume of 0.65-0.9 cc/g, and a Pore Diameter Distribution whereby 50-62.8% of the Total Pore Volume is present as micropores of diameter 55-115 .ANG. and 20-30.5% of the Total Pore Volume is present as macropores of diameter greater than 250 .ANG..The heavy oils and hydrogen are contacted with the catalyst such that the catalyst is maintained at isothermal conditions and is exposed to a uniform quality of feed. The process is particularly effective in achieving desired levels of hydroconversion of feedstock components having a boiling point greater than 1000.degree. F. to products having a boiling point less than 1000.degree. F.Type: GrantFiled: October 1, 1993Date of Patent: May 7, 1996Assignee: Texaco Inc.Inventors: David E. Sherwood, Jr., Pei-Shing E. Dai, Charles N. Campbell, II
-
Patent number: 5498586Abstract: Disclosed is a hydrotreating catalyst which comprises a porous alumina support bearing metals of Group VIII and VI-B and optionally phosphorus, the catalyst having a Total Surface Area of 240-310 m.sup.2 /g, a Total Pore Volume of 0.5-0.75 cc/g, and a Pore Diameter Distribution whereby 63-78% of the Total Pore Volume is present as micropores of diameter 55-115 .ANG. and 11-18% of the Total Pore Volume is present as macropores of diameter greater than 250 .ANG., said catalyst being particularly effective in achieving desired levels of hydroconversion of feedstock components having a boiling point greater than 1000.degree. F. to products having a boiling point less than 1000.degree. F.Type: GrantFiled: November 3, 1994Date of Patent: March 12, 1996Assignee: Texaco Inc.Inventors: Pei-Shing E. Dai, David E. Sherwood, Jr.
-
Patent number: 5459118Abstract: 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: GrantFiled: May 9, 1994Date of Patent: October 17, 1995Assignee: Texaco Inc.Inventors: Pei-Shing E. Dai, David E. Sherwood, Jr., Randall H. Petty
-
Patent number: 5445728Abstract: Spent or inactive alumina-supported catalysts removed from a catalytic hydrotreating process and having carbonaceous and metallic deposits thereon are reactivated. After a solvent wash to remove process oils, the spent catalyst is contacted with steam at a temperature of 1000.degree. to about 1250.degree. F. for a period of about 2 to about 5 hours to form a reactivated catalyst suitable for reuse in a catalytic hydrotreating process. Optionally, the steam-treated catalyst can be regenerated by contact with an oxygen-containing gas at a temperature of about 700.degree. to about 900.degree. F. to remove carbon deposits from the catalyst, or, alternatively, the steam-treated catalyst can be acid-leached to remove undesired metals and then contacted with an oxygen-containing gas at an elevated temperature to remove carbon deposits.Type: GrantFiled: July 18, 1994Date of Patent: August 29, 1995Assignee: Texaco Inc.Inventors: David E. Sherwood, Jr., Johnnie R. Hardee, Jr.
-
Patent number: 5441630Abstract: 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: GrantFiled: April 12, 1993Date of Patent: August 15, 1995Assignee: Texaco, Inc.Inventors: Eugene P.-S. Dai, David E. Sherwood, Jr., Bobby R. Martin, Randall H. Petty
-
Patent number: 5436215Abstract: A mild hydrocracking process for the hydrodemetallation (HDM), hydrodesulfurization (HDS) and hydroconversion (HC) of hydrocarbon feedstocks such as residuum feedstocks which provides increased conversion and increased yields of middle distillates is disclosed. The process utilizes a catalyst comprising about 1.0 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 5.0 wt. % of an oxide of phosphorus supported on a porous alumina support containing about 0.1 to about 10.0 wt. % of lithium oxide.Type: GrantFiled: December 6, 1993Date of Patent: July 25, 1995Assignee: Texaco Inc.Inventors: Pei-Shing E. Dai, Charles N. Campbell, II, Joseph A. Durkin, David E. Sherwood, Jr.
-
Patent number: 5435908Abstract: Heavy hydrocarbons are hydrotreated to increase content of components boiling below 1000.degree. F. by contact with Group VIII non-noble metal oxide and Group VI-B metal oxide on alumina having a Total Surface Area of 150-240 m.sup.2 /g, a Total Pore Volume, (TPV) of 0.7-0.98, and a Pore Diameter Distribution whereby .ltoreq.20% of the TPV is present as primary micropores of diameter .ltoreq.100 .ANG., at least about 34% of TPV is present as secondary micropores of diameter of about 100 .ANG.-200 .ANG., and about 26%-46% of the TPV is present as mesopores of diameter >200 .ANG..Type: GrantFiled: May 16, 1994Date of Patent: July 25, 1995Assignee: Texaco Inc.Inventors: Gerald V. Nelson, Govanon Nongbri, Roy E. Pratt, David E. Sherwood, Jr., Pei-Shing E. Dai
-
Patent number: 5416054Abstract: Heavy oils may be hydrotreated in the presence of a porous alumina support bearing metals of Group VIII and VI-B and optionally phosphorus, the catalyst having a Total Surface Area of 165-230 m.sup.2 /g, a Total Pore Volume of 0.5-0.8 cc.g, and a Pore Diameter Distribution whereby less than about 5% the Total Pore Volume is present as primary micropores of diameter less than 80 .ANG., and secondary micropores of diameter of +20 .ANG. of a Pore Mode of 100-135 .ANG. are present in amount of at least about 65% of the micropore volume having pores with diameter less than 250 .ANG., and 22-29% of the Total Pore Volume is present as macropores of diameter >250 .ANG..The process of the instant invention is particularly effective in achieving desired levels of hydrodemetallation, hydrodesulfurization, and hydrocracking of asphaltenes in the fraction of hydrotreated/hydrocracked petroleum resid product having a boiling point greater than 1000.degree. F.Type: GrantFiled: February 25, 1993Date of Patent: May 16, 1995Assignee: Texaco Inc.Inventors: Pei-Shing E. Dai, Gerald V. Nelson, Govanon Nongbri, Roy E. Pratt, David E. Sherwood, Jr.
-
Patent number: 5399259Abstract: Heavy oils may be hydrotreated in the presence of a porous alumina support bearing metals of Group VIII and VI-B and optionally phosphorus, the catalyst having a Total Surface Area of 165-230 m.sup.2 /g, a Total Pore Volume of 0.5-0.8 cc.g, and a Pore Diameter Distribution whereby less than about 5% of the Total Pore Volume is present as primary micropores of diameter less than 80.ANG., and secondary micropores of diameter of .+-.20.ANG. of a Pore Mode of 100-135.ANG. are present in amount of at least about 65% of the micropore volume having pores with diameter less than 250.ANG., and 22-29% of the Total Pore Volume is present as macropores of diameter >250.ANG.. The process of the instant invention is particularly effective in achieving desired levels of hydrodemetallation, hydrodesulfurization, and hydrocracking of asphaltenes in the fraction of hydrotreated/hydrocracked petroleum resid product having a boiling point greater than 1000.degree. F.Type: GrantFiled: April 20, 1992Date of Patent: March 21, 1995Assignee: Texaco Inc.Inventors: Pei-Shing E. Dai, Gerald V. Nelson, Govanon Nongbri, Roy E. Pratt, David E. Sherwood, Jr.
-
Patent number: 5397456Abstract: Heavy oils may be hydrotreated in the presence of a porous alumina support bearing metals of Group VIII and VI-B and optionally phosphorus, the catalyst having a Total Surface Area of 240-310 m.sup.2 /g, a Total Pore Volume of 0.5-0.75 cc/g, and a Pore Diameter Distribution whereby 63-78% of the Total Pore Volume is present as micropores of diameter 55-115A and 11-18% of the Total Pore Volume is present as macropores of diameter greater than 250A. The heavy oils and hydrogen are contacted with the catalyst such that the catalyst is maintained at isothermal conditions and is exposed to a uniform quality of feed. The process is particularly effective in achieving desired levels of hydroconversion of feedstock components having a boiling point greater than 1000.degree. F. to products having a boiling point less than 1000.degree. F.Type: GrantFiled: February 19, 1993Date of Patent: March 14, 1995Assignee: Texaco Inc.Inventors: Pei-Shing E. Dai, David E. Sherwood, Jr.
-
Patent number: 5358633Abstract: Hydrodesulfurization of a cracked naphtha is effected in the presence of a transition alumina support bearing a Group VIII non-noble metal oxide and a Group VI-B metal oxide, the atom ratio of Group VIII metal to Group VI-B metal being 1-8. 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: GrantFiled: May 28, 1993Date of Patent: October 25, 1994Assignee: Texaco Inc.Inventors: Eugene Pei-Shing Dai, David E. Sherwood, Jr.
-
Patent number: 5354452Abstract: A novel zeolite characterized by a large number of secondary pores, a substantially decreased lattice constant, and a substantially decreased acid site density is attained by hydrothermal and acid-treating of an ultrastable Y-zeolite or a superultrastable Y-zeolite.Type: GrantFiled: October 19, 1992Date of Patent: October 11, 1994Assignee: Texaco Inc.Inventors: Eugene P. Dai, David E. Sherwood, Jr., Burton H. Bartley
-
Patent number: 5342507Abstract: 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 heavy hydrocarbons boiling above 1000.degree. F. into products boiling below 1000.degree. F. as well as increased yields of middle distillates is disclosed. The process utilizes a catalyst comprising about 1.0 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 5.0 wt. % of an oxide of phosphorus supported on a porous support comprising precipitated alumina or silica-containing alumina and dealuminated Y-zeolite.Type: GrantFiled: April 16, 1993Date of Patent: August 30, 1994Assignee: Texaco Inc.Inventors: Pei-Shing E. Dai, Charles N. Campbell, II, Bobby R. Martin, David E. Sherwood, Jr.
-
Patent number: 5340466Abstract: 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: GrantFiled: April 19, 1993Date of Patent: August 23, 1994Assignee: Texaco Inc.Inventors: Pei-Shing E. Dai, David E. Sherwood, Jr., Randall Hughes Petty
-
Patent number: 5322616Abstract: A mild hydrocracking process for the hydrodemetallation (HDM), hydrodesulfurization (HDS) and hydroconversion (HC) of hydrocarbon feedstocks such as residuum feedstocks which provides increased conversion and increased yields of middle distillates is disclosed. The process utilizes a catalyst comprising about 1.0 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 about 0 to about 5.0 wt. % of an oxide of phosphorus supported on a porous alumina support containing about 0.1 to about 10.0 wt. % of lithium oxide.Type: GrantFiled: March 30, 1992Date of Patent: June 21, 1994Assignee: Texaco Inc.Inventors: Pei-Shing E. Dai, Charles N. Campbell, II, Joseph A. Durkin, David E. Sherwood, Jr.
-
Patent number: 5308472Abstract: 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 heavy hydrocarbons boiling above 1000.degree. F. into products boiling below 1000.degree. F. as well as increased yields of middle distillates is disclosed. The process utilizes a catalyst comprising about 1.0 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 0.1 to about 5.0 wt. % of an oxide of phosphorus supported on a porous support comprising precipitated alumina or silica-containing alumina and hydrogen form, acidified, dealuminated Y-zeolite.Type: GrantFiled: June 11, 1992Date of Patent: May 3, 1994Assignee: Texaco Inc.Inventors: Pei-Shing E. Dai, Charles N. Campbell, II, Bobby R. Martin, David E. Sherwood, Jr.
-
Patent number: 5254513Abstract: Spent or inactive alumina-supported catalysts removed from a catalytic hydrotreating process and having carbonaceous and metallic deposits thereon are reactivated. After a solvent wash to remove process oils, the spent catalyst is contacted with steam at a temperature of 1000.degree. to about 1250.degree. F. for a period of about 2 to about 5 hours to form a reactivated catalyst suitable for reuse in a catalytic hydrotreating process. Optionally, the steam-treated catalyst can be regenerated by contact with an oxygen-containing gas at a temperature of about 700.degree. to about 900.degree. F. to remove carbon deposits from the catalyst, or, alternatively, the steam-treated catalyst can be acid-leached to remove undesired metals and then contacted with an oxygen-containing gas at an elevated temperature to remove carbon deposits.Type: GrantFiled: May 20, 1991Date of Patent: October 19, 1993Assignee: Texaco, Inc.Inventors: David E. Sherwood, Jr., Johnnie R. Hardee, Jr.