Patents by Inventor Shang Y. Chen
Shang Y. Chen 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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Patent number: 7378068Abstract: The present invention includes a process for the removal of hydrogen sulfide from hydrogen sulfide gas containing gaseous streams. In one embodiment, the process comprises feeding a sulfide ion containing solution to an oxidation unit. The method further comprises feeding an oxidizing gas to the oxidation unit and contacting the sulfide ion containing solution with the oxidizing gas under sufficient conditions to form a polysulfide solution comprising polysulfide and hydroxide ions. In addition, the process comprises mixing the polysulfide containing solution with a hydrogen sulfide gas under conditions sufficient for absorption of hydrogen sulfide and precipitation of sulfur from the polysulfide containing solution. In some embodiments, the process comprises separating the precipitated sulfur from liquid.Type: GrantFiled: June 1, 2005Date of Patent: May 27, 2008Assignee: ConocoPhillips CompanyInventors: Zhenhua Mao, Shang Y. Chen
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Patent number: 7074977Abstract: The invention relates to a reactor comprising two reaction zones and processes for the production of alkenes from alkanes. A first reaction zone includes a combustion catalyst, and a second reaction zone comprises a heating zone in thermal contact with the first reaction zone. One process comprises generating heat and an effluent by the combustion of a fuel with oxygen in the first reaction zone; passing an alkane feed through the heating zone of the second reaction zone such that the alkane feed absorbs a sufficient amount of the heat generated in the first reaction zone to initiate the conversion of alkanes to alkenes in the second reaction zone. In other embodiments, the effluent comprises oxygen, and the second reaction zone excludes a catalyst; alternatively, the effluent is substantially free of oxygen, and the second reaction zone comprises a supplemental oxygen feed and may or may not include a catalyst.Type: GrantFiled: December 9, 2003Date of Patent: July 11, 2006Assignee: ConocoPhillips CompanyInventors: Charles R. Rapier, Daniel P. Holderman, Zhen Chen, Shang Y. Chen, Steven R. McDonald, Lisa M. Budin, Sriram Ramani, Joe D. Allison
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Patent number: 7067455Abstract: Catalysts and methods useful for the production of olefins from alkanes via oxidative dehydrogenation (ODH) comprise at least one base metal and copper with an optional promoter. The catalyst preferably comprises a base metal and a copper-modified Groups 8, 9, or 10 metal on a support comprising alumina, zirconia, or mixtures thereof. Copper is preferably present in an amount of from about 0.1 to about 1.0 percent by weight of the total catalyst weight. The base metal preferably comprises manganese, chromium, gold, their corresponding oxides, or combinations thereof. The optional promoter preferably comprises platinum, palladium, iridium, rhodium, ruthenium, or any combinations thereof.Type: GrantFiled: November 21, 2003Date of Patent: June 27, 2006Assignee: ConocoPhillips CompanyInventors: Zhen Chen, Steven R. McDonald, Shang Y. Chen, Stephan Basso, Charles R. Rapier, Angela R. Bailey-Rivers, Cemal Ercan
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Publication number: 20040176656Abstract: Catalysts and methods useful for the production of olefins from alkanes via oxidative dehydrogenation (ODH) are disclosed. The ODH catalysts include a base metal selected from the group consisting of lanthanide metals, their oxides, and combinations thereof. The base metal is more preferably selected from the group consisting of samarium, cerium, praseodymium, terbium, their corresponding oxides and combinations thereof. The base metal loading is preferably between about 0.5 and about 20 weight percent and more preferably between about 2 and about 10 weight percent. Optionally, the ODH catalysts are further comprised of a Group VIII promoter metal present at trace levels. The Group VIII promoter metal is preferably platinum, palladium or a combination thereof and is preferably present at a promoter metal loading of between about 0.005 and about 0.1 weight percent. Optionally, the ODH catalyst is supported on a refractory support.Type: ApplicationFiled: March 23, 2004Publication date: September 9, 2004Applicant: ConocoPhillips CompanyInventors: Joe D. Allison, Sriram Ramani, Zhen Chen, Lisa M. Carmichael, Shang Y. Chen, Steve R. McDonald, Anne Gaffney
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Publication number: 20040171900Abstract: The present invention includes methods and apparatus for start-up a chemical reactor wherein at least a portion of the igniter is downstream from the reaction zone which needs to be ignited. Particularly, embodiments of the present invention include a partial oxidation reactor with an igniter downstream of the partial oxidation zone.Type: ApplicationFiled: February 28, 2003Publication date: September 2, 2004Applicant: ConocoPhillips CompanyInventors: Daxiang Wang, Chad Ricketson, Gloria I. Straguzzi, Harold A. Wright, Larry D. Swinney, Joe D. Allison, Zhen Chen, Kevin L. Ricketson, Shang Y. Chen, Steven R. McDonald
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Publication number: 20040068148Abstract: Catalysts and methods useful for the production of olefins from alkanes via oxidative dehydrogenation (ODH) are disclosed. The ODH catalysts are comprised of a Group VIII promoter metal present at trace levels. The Group VIII promoter metal is preferably platinum, palladium or a combination thereof and is preferably present at a promoter metal loading of between about 0.005 and about 0.1 weight percent. Optionally, the ODH catalysts include a base metal, metal oxide, or combination thereof. The optional base metal is selected from the group consisting of Group IB-IIB metals, Group IVB-VIIB metals, Group IIA-VA metals, scandium, yttrium, actinium, iron, cobalt, nickel, their oxides, and combinations thereof. The base metal is more preferably selected from the group consisting copper, tin, chromium, gold, manganese and their respective oxides and any combinations thereof. The base metal loading is preferably between about 0.5 and about 10 weight percent.Type: ApplicationFiled: October 8, 2002Publication date: April 8, 2004Applicant: Conoco Inc.Inventors: Joe D. Allison, Sriram Ramani, Zhen Chen, Lisa M. Carmichael, Shang Y. Chen, Steve R. McDonald, Anne Gaffney
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Publication number: 20040068153Abstract: Catalysts and methods useful for the production of olefins from alkanes via oxidative dehydrogenation (ODH) are disclosed. The ODH catalysts include a base metal selected from the group consisting of lanthanide metals, their oxides, and combinations thereof. The base metal is more preferably selected from the group consisting of samarium, cerium, praseodymium, terbium, their corresponding oxides and combinations thereof. The base metal loading is preferably between about 0.5 and about 20 weight percent and more preferably between about 2 and about 10 weight percent. Optionally, the ODH catalysts are further comprised of a Group VIII promoter metal present at trace levels. The Group VIII promoter metal is preferably platinum, palladium or a combination thereof and is preferably present at a promoter metal loading of between about 0.005 and about 0.1 weight percent. Optionally, the ODH catalyst is supported on a refractory support.Type: ApplicationFiled: October 8, 2002Publication date: April 8, 2004Applicant: Conoco Inc.Inventors: Joe D. Allison, Sriram Ramani, Zhen Chen, Lisa M. Carmichael, Shang Y. Chen, Steve R. McDonald, Anne Gaffney