Patents by Inventor Robert G. Bowman
Robert G. Bowman 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).
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Publication number: 20040176620Abstract: A process of preparing a catalyst comprising gold on a titanium-containing support. The method involves impregnating a support with a gold compound, a reducing agent, and optionally a promoter metal, wherein the reducing agent and/or the support contains titanium, and optionally heating the impregnated support. The catalyst is useful in the hydro-oxidation of olefins, such as propylene, with oxygen in the presence of hydrogen to olefin oxides, such as propylene oxide.Type: ApplicationFiled: March 15, 2004Publication date: September 9, 2004Inventors: Alex Kuperman, Robert G. Bowman, Howard W. Clark, George E. Hartwell, Garmt R. Meima
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Publication number: 20040171893Abstract: A method of increasing the lifetime of a hydro-oxidation catalyst comprising, preferably, gold, silver, or mixtures thereof, and optionally one or more promoters, on a titanium-containing support, such as a titanosilicate or titanium dispersed on silica. The method of the invention involves contacting the catalyst support with a hydroxy-functionalized organosilicon compound, a carboxy-functionalized organosilicon compound, or a mixture of hydroxy- and carboxy-functionalized organosilicon compounds, such as, sodium methyl siliconate or (2-carboxypropyl)tetramethyldisiloxane. The contacting is preferably conducted during deposition of the catalytic metal(s) and optional promoters(s) onto the support. A catalyst composition and hydro-oxidation process utilizing the silicon-treated catalyst support are also claimed.Type: ApplicationFiled: January 21, 2004Publication date: September 2, 2004Inventors: David G. Barton, Robert G Bowman, George E Hartwell, Howard W Clark, Alexander Kuperman
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Patent number: 6670491Abstract: A process and catalysts for the direct oxidation of an olefin having three or more carbon atoms, such as propylene, by oxygen to an olefin oxide, such as propylene oxide. The process involves contacting the olefin under reaction conditions with oxygen in the presence of hydrogen and a catalyst. The catalyst contains silver and titanium, optionally gold, and optionally, at least one promoter element selected from Group 1, Group 2, zinc, cadmium, the lanthanide rare earths, and the actinide elements. Suitable supports include titanium dioxide, titanium dioxide on silica, titanosilicates, promoter metal titanates, titanium dispersed on silica and promoter metal silicates.Type: GrantFiled: January 14, 2003Date of Patent: December 30, 2003Assignee: Dow Global Technologies Inc.Inventors: Robert G. Bowman, Howard W. Clark, Alex Kuperman, George E. Hartwell, Garmt R. Meima
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Publication number: 20030212283Abstract: A process of activating a fresh catalyst or regenerating a deactivated catalyst which is used in a hydro-oxidation process, preferably, the hydro-oxidation of an olefin in the presence of oxygen and hydrogen to an olefin oxide. The hydro-oxidation catalyst preferably comprises at least one metal selected from gold, silver, the platinum group metals, the lanthanide metals, and combinations thereof, incorporated onto a titanium- , vanadium- , or zirconium-containing support more preferably, a titanium-containing support, such as titanium oxide or a titanosilicate. The activation or regeneration process involves contacting the fresh catalyst or the deactivated catalyst with ozone.Type: ApplicationFiled: September 30, 2002Publication date: November 13, 2003Inventors: Deborah H. Parker, Robert G. Bowman, Howard W. Clark, George E. Hartwell, Alex Kuperman
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Patent number: 6646142Abstract: A process and catalysts for the direct oxidation of an olefin having three or more carbon atoms, such as propylene, by oxygen to an olefin oxide, such as prbpylene oxide. The process involves contacting the olefin under reaction conditions with oxygen in the presence of hydrogen and a catalyst. The catalyst contains silver and titanium, optionally gold, and optionally, at least one promoter element selected from Group 1, Group 2, zinc, cadmium, the platinum group metals, the lanthanide rare earths, the actinide elements, and combinations thereof. In preferred embodiments, the catalyst is calcined prior to use, rather than reduced prior to use. Suitable titanium-containing supports include titanium dioxide, titanium dioxide on silica, titanosilicates, promoter metal titanates, titanium dispersed on silica and promoter metal silicates.Type: GrantFiled: July 9, 2001Date of Patent: November 11, 2003Assignee: Dow Global Technologies Inc.Inventors: Garmt R. Meima, Howard W. Clark, Robert G. Bowman, Alex Kuperman, George E. Hartwell
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Publication number: 20030144141Abstract: A process and catalysts for the direct oxidation of an olefin having three or more carbon atoms, such as propylene, by oxygen to an olefin oxide, such as propylene oxide. The process involves contacting the olefin under reaction conditions with oxygen in the presence of hydrogen and a catalyst. The catalyst contains silver and titanium, optionally gold, and optionally, at least one promoter element selected from Group 1, Group 2, zinc, cadmium, the lanthanide rare earths, and the actinide elements. Suitable supports include titanium dioxide, titanium dioxide on silica, titanosilicates, promoter metal titanates, titanium dispersed on silica and promoter metal silicates.Type: ApplicationFiled: January 14, 2003Publication date: July 31, 2003Inventors: Robert G. Bowman, Howard W. Clark, Alex Kuperman, George E. Hartwell, Garmt R. Meima
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Patent number: 6562986Abstract: A process and catalysts for the direct oxidation of an olefin having three or more carbon atoms, such as propylene, by oxygen to an olefin oxide, such as propylene oxide. The process involves contacting the olefin under reaction conditions with oxygen in the presence of hydrogen and a catalyst. The catalyst contains silver and titanium, optionally gold, and optionally, at least one promoter element selected from Group 1, Group 2, zinc, cadmium, the lanthanide rare earths, and the actinide elements. Suitable supports include titanium dioxide, titanium dioxide on silica, titanosilicates, promoter metal titanates, titanium dispersed on silica and promoter metal silicates.Type: GrantFiled: February 19, 2002Date of Patent: May 13, 2003Assignee: Dow Global Technologies, Inc.Inventors: Robert G. Bowman, Alex Kuperman, Howard W. Clark, George E. Hartwell, Garmt R. Meima
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Patent number: 6524991Abstract: A process and catalyst for the direct oxidation of an olefin having three or more carbon atoms, such as propylene, by oxygen to the corresponding olefin oxide, such as propylene oxide. The process involves contacting the olefin with oxygen under reaction conditions in the presence of hydrogen and in the presence of a catalyst. The catalyst comprises gold on a titanosilicate, preferably a microporous or mesoporous titanosilicate, such as, TS-1, TS-2, Ti-beta, Ti-ZSM-48, or Ti-MCM-41. Selectivity to the olefin oxide is high at good conversions of the olefin. The catalyst is readily regenerated, and the time between catalyst regenerations is long.Type: GrantFiled: September 26, 2001Date of Patent: February 25, 2003Assignee: Dow Global Technologies Inc.Inventors: Robert G. Bowman, Joseph L. Womack, Howard W. Clark, Joseph J. Maj, George E. Hartwell
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Publication number: 20020161250Abstract: A process and catalysts for the direct oxidation of an olefin having three or more carbon atoms, such as propylene, by oxygen to an olefin oxide, such as propylene oxide. The process involves contacting the olefin under reaction conditions with oxygen in the presence of hydrogen and a catalyst. The catalyst contains silver and titanium, optionally gold, and optionally, at least one promoter element selected from Group 1, Group 2, zinc, cadmium, the lanthanide rare earths, and the actinide elements. Suitable supports include titanium dioxide, titanium dioxide on silica, titanosilicates, promoter metal titanates, titanium dispersed on silica and promoter metal silicates.Type: ApplicationFiled: February 19, 2002Publication date: October 31, 2002Inventors: Robert G. Bowman, Alex Kuperman, Howard W. Clark, George E. Hartwell, Garmt R. Meima
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Publication number: 20020052290Abstract: A process and catalyst for the direct oxidation of an olefin having three or more carbon atoms, such as propylene, by oxygen to the corresponding olefin oxide, such as propylene oxide. The process involves contacting the olefin with oxygen under reaction conditions in the presence of hydrogen and in the presence of a catalyst. The catalyst comprises gold on a titanosilicate, preferably a microporous or mesoporous titanosilicate, such as, TS-1, TS-2, Ti-beta, Ti-ZSM-48, or Ti-MCM-41. Selectivity to the olefin oxide is high at good conversions of the olefin. The catalyst is readily regenerated, and the time between catalyst regenerations is long.Type: ApplicationFiled: September 26, 2001Publication date: May 2, 2002Inventors: Robert G. Bowman, Joseph L. Womack, Howard W. Clark, Joseph J. Maj, George E. Hartwell
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Patent number: 6362349Abstract: A process for the direct oxidation of an olefin by oxygen to the corresponding olefin oxide in the presence of a reducing agent and a catalyst. The catalyst comprises a metal component, such as a transition metal oxide, dispersed on a metal ion-exchanged metallosilicates, such as a Group 1 or Group 2 ion-exchanged porous aluminosilicate. Selectivity to the olefin oxide is high and the catalyst is readily regenerated.Type: GrantFiled: October 4, 2000Date of Patent: March 26, 2002Assignee: The Dow Chemical CompanyInventors: Alex Kuperman, Robert G. Bowman, Howard W. Clark, George E. Hartwell
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Patent number: 6323351Abstract: A process and catalysts for the direct oxidation of an olefin having three or more carbon atoms, such as propylene, by oxygen to an olefin oxide, such as propylene oxide. The process involves contacting the olefin under reaction conditions with oxygen in the presence of hydrogen and a catalyst. The catalyst contains silver and titanium, optionally gold, and optionally, at least one promoter element selected from Group 1, Group 2, zinc, cadmium, the lanthanide rare earths, and the actinide elements. Suitable supports include titanium dioxide, titanium dioxide on silica, titanosilicates, promoter metal titanates, titanium dispersed on silica and promoter metal silicates.Type: GrantFiled: December 9, 1999Date of Patent: November 27, 2001Assignee: The Dow Chemical CompanyInventors: Robert G. Bowman, Alex Kuperman, Howard W. Clark, George E. Hartwell, Garmt R. Meima
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Patent number: 6309998Abstract: A process and catalyst for the direct oxidation of an olefin having three or more carbon atoms, such as propylene, by oxygen to the corresponding olefin oxide, such as propylene oxide. The process involves contacting the olefin with oxygen under reaction conditions in the presence of hydrogen and in the presence of a catalyst. The catalyst comprises gold on a titanosilicate, preferably a microporous or mesoporous titanosilicate, such as, TS-1, TS-2, Ti-beta, Ti-ZSM-48, or Ti-MCM-41. Selectivity to the olefin oxide is high at good conversions of the olefin. The catalyst is readily regenerated, and the time between catalyst regenerations is long.Type: GrantFiled: December 9, 1999Date of Patent: October 30, 2001Assignee: The Dow Chemical CompanyInventors: Robert G. Bowman, Joseph L. Womack, Howard W. Clark, Joseph J. Maj, George E. Hartwell
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Patent number: 6255499Abstract: A process and catalyst for the hydro-oxidation of an olefin having three or more carbon atoms, such as propylene, to form an olefin oxide, such as propylene oxide. The process involves contacting the olefin with oxygen under reaction conditions in the presence of hydrogen and a catalyst. The catalyst contains oxidized gold dispersed on a titanium-containing support, preferably, a support having a plurality of titanium coordination environments, for example, titanium grafted onto a titanosilicate. Selectivity to olefin oxide is high at good conversion of the olefin. The catalyst uses hydrogen efficiently and exhibits a long lifetime.Type: GrantFiled: April 7, 2000Date of Patent: July 3, 2001Assignee: The Dow Chemical CompanyInventors: Alex Kuperman, Robert G. Bowman, Howard W. Clark, George E. Hartwell, Brian J. Schoeman, Hendrik E. Tuinstra, Garmt R. Meima
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Patent number: 6031116Abstract: A process and catalyst for the direct oxidation of an olefin having three or more carbon atoms, such as propylene, by oxygen to the corresponding olefin oxide, such as propylene oxide. The process involves contacting the olefin with oxygen under reaction conditions in the presence of hydrogen and in the presence of a catalyst. The catalyst comprises gold on a titanosilicate, preferably a microporous or mesoporous titanosilicate, such as, TS-1, TS-2, Ti-beta, Ti-ZSM-48, or Ti-MCM-41. Selectivity to the olefin oxide is high at good conversions of the olefin. The catalyst is readily regenerated, and the time between catalyst regenerations is long.Type: GrantFiled: December 11, 1998Date of Patent: February 29, 2000Assignee: The Dow Chemical CompanyInventors: Robert G. Bowman, Joseph L. Womack, Howard W. Clark, Joseph J. Maj, George E. Hartwell
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Patent number: 5965754Abstract: A process and catalyst for the direct oxidation of an olefin having three or more carbon atoms, such as propylene, by oxygen to an olefin oxide, such as propylene oxide. The process involves contacting the olefin with oxygen under reaction conditions in the presence of hydrogen and a catalyst. The catalyst comprises gold on a support of titanium dispersed on silica. The titanium phase is disorganized and substantially free of crystalline titanium dioxide, as determined by analytical methods, such as, high resolution transmission electron microscopy and Raman spectroscopy. Selectivity to olefin oxide is high at good conversions of the olefin. The time between catalyst regenerations is long, and the catalyst is readily regenerated.Type: GrantFiled: December 11, 1998Date of Patent: October 12, 1999Assignee: The Dow Chemical CompanyInventors: Howard W. Clark, Robert G. Bowman, Joseph J. Maj, Simon R. Bare, George E. Hartwell
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Patent number: 5554793Abstract: A process of reforming an alkyleneamine feedstock or a mixture of such feedstocks to an alkyleneamine or a mixture of alkyleneamines which is different from the feedstock or feedstock mixture. The process is catalyzed by one of the following: Group VB metal oxides, Group VB metal phosphates, Group IIA metal silicates, and tungsten oxides. For example, ethylenediamine is contacted with a catalyst of niobic acid or magnesium silicate to yield predominantly diethylenetriamine and non-cyclic triethylenetetramines; whereas high molecular weight polyethylenepolyamines are cracked by the same catalysts to mixtures of lower molecular weight linear and cyclic materials.Type: GrantFiled: December 19, 1994Date of Patent: September 10, 1996Assignee: The Dow Chemical CompanyInventors: George E. Hartwell, Robert G. Bowman, David C. Molzahn
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Patent number: 5410087Abstract: A process of reforming an alkyleneamine feedstock or a mixture of such feedstocks to an alkyleneamine or a mixture of alkyleneamines which is different from the feedstock or feedstock mixture. The process is catalyzed by one of the following: Group VB metal oxides, Group VB metal phosphates, Group IIA metal silicates, and tungsten oxides. For example, ethylenediamine is contacted with a catalyst of niobic acid or magnesium silicate to yield predominantly diethylenetriamine and non-cyclic triethylenetetramines; whereas high molecular weight polyethylenepolyamines are cracked by the same catalysts to mixtures of lower molecular weight linear and cyclic materials.Type: GrantFiled: November 17, 1993Date of Patent: April 25, 1995Assignee: The Dow Chemical CompanyInventors: George E. Hartwell, David C. Molzahn, Robert G. Bowman
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Patent number: 5380041Abstract: A boot for protecting heel ends of a pair of skis includes a pocket-shaped body having a pair of side walls, a pair of end walls extending between and interconnecting the side walls and a bottom wall extending between and connecting the lower ends of the side walls and end walls. The side, end and bottom walls together forming a cavity open at a top end for receiving the heel ends of a pair of skis. The bottom wall is of greater thickness than the side and end walls. The pocket-shaped body is made of a material sufficiently flexible and resilient to removably fit over the heel ends of the skis and to grip the surfaces thereon. A plurality of raised ribs are formed on the exterior of lower end portions of the side walls of the pocket-shaped body for gripping by the user to pull the body off from the heel ends of the skis.Type: GrantFiled: October 6, 1993Date of Patent: January 10, 1995Inventor: Robert G. Bowman
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Patent number: 5304688Abstract: A process for the preparation of bishydroxy aromatic compounds, such as 9,9-bis(4-hydroxyphenyl)fluorene, involving contacting a ketone, such as fluorenone, with phenol or substituted phenol in the presence of a mercaptan cocatalyst and a solid superacid catalyst of Hammett acid strength H.sub.0 greater than about -13.0. Solid superacid catalysts include the sulfates, sulfated oxides, sulfated oxyhydroxides, and sulfated oxysilicates of aluminum, tin, and the Group IVA metals, such as zirconium, as well as mixed metal oxides, such as tungsten-zirconium oxides. Isolated yields are high for 9,9-bis(4-hydroxyphenyl)fluorene.Type: GrantFiled: April 13, 1993Date of Patent: April 19, 1994Assignee: The Dow Chemical CompanyInventors: Robert G. Bowman, Muthiah N. Inbasekaran