Patents by Inventor Yeping Cai
Yeping Cai 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: 7749376Abstract: The present invention is a method for the adsorption of sulfur-containing compounds from a hydrocarbon feedstream, and in particular, an olefin feedstream. The method comprises contacting the sulfur-containing compound with a copper oxide/zinc oxide/aluminum oxide catalyst optionally promoted with a metal.Type: GrantFiled: August 15, 2005Date of Patent: July 6, 2010Assignee: Sud-Chemie Inc.Inventors: Wayne Turbevillle, Nora Yap, Yeping Cai, Jürgen Ladebeck
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Publication number: 20100081567Abstract: A process for the sulfidation of a sour gas shift catalyst, wherein the temperature of the sulfidation feed stream is coordinated with the sulfur/hydrogen molar ratio in that feed stream to obtain enhanced performance of the sour gas shift catalyst. In the sulfidation process to produce a sour gas shift catalyst, the lower the sulfur to hydrogen molar ratio of the sulfidation feed stream, the lower the required temperature of the sulfidation feed stream. The sulfidation reaction can be further enhanced by increasing the pressure on the sulfidation feed stream.Type: ApplicationFiled: September 25, 2009Publication date: April 1, 2010Applicant: SUD-CHEMIE INC.Inventors: Justin X. Wang, Yeping Cai
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Publication number: 20090152500Abstract: The present development is a catalyst for use in water gas shift processes, a method for making the catalyst and a method of using the catalyst. The catalyst is composed of iron oxide, copper oxide, zinc oxide, alumina, and optionally, potassium oxide, and is produced using a hydrothermal synthesis process. The catalyst demonstrates surprising activity for conversion of carbon monoxide under high to moderate temperature shift reaction conditions.Type: ApplicationFiled: December 17, 2007Publication date: June 18, 2009Inventors: Chao Chen, Eshan Li, Yanxia Wang, Yeping Cai, Chandra Ratnasamy, Jeffery E. Riley, Xueqin J. Wang, Shizhong Zhao, Jurgen R. Ladebeck
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Patent number: 7378369Abstract: A calcium-promoted alumina supported nickel reforming catalyst stabilized with titanium is disclosed. The catalyst is particularly useful for reforming reaction in feed streams containing significant quantities of CO and CO2, low quantities of steam (the feed stream having a H2O/CH4 of less than 0.8 and a CO2/CH4 of greater than 0.5) and relatively high quantities of sulfur compounds (up to about 20 ppm). The catalyst comprises from about 25 wt % to about 98 wt % alumina as a support, from about 2 wt % to about 40 wt % nickel oxide, which is promoted with from about 0.5 wt % to about 35 wt % calcium oxide, and which is stabilized with from about 0.01 wt % to about 20 wt % titanium, wherein the calcium oxide is combined with the alumina to form calcium aluminate. The catalyst can be used in reforming reactions to produce syngas and has advantages in producing low hydrogen to carbon monoxide ratio syngas for applications such as iron ore reduction.Type: GrantFiled: March 22, 2004Date of Patent: May 27, 2008Assignee: Sud-Chemie Inc.Inventors: Shizhong Zhao, Yeping Cai, Jurgen Ladebeck
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Patent number: 7378370Abstract: A promoted calcium-alumina supported reforming catalyst that is particularly useful for reforming reactions where low H2/CO ratio synthesis gas, such as less than 2.3 is generated directly is disclosed. The catalyst comprises from about 25 wt % to about 98 wt % alumina, from about 0.5 wt % to about 35 wt % calcium oxide, from about 0.01 wt % to about 35 wt % of a promoter, and from about 0.05 wt % to about 30 wt % of an active metal. The promoter is selected from the group consisting of titanium, zirconium, yttrium, niobium, elements of the lanthanum-series, such as, without limitation, lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, ytterbium, and combinations thereof. The active metal is selected from the group consisting of nickel, cobalt, rhodium, ruthenium, palladium, platinum, iridium and combinations thereof as active metal, wherein the calcium oxide is combined with the alumina to form aluminum-rich calcium aluminates.Type: GrantFiled: October 13, 2004Date of Patent: May 27, 2008Assignee: Süd-Chemie IncInventors: Yeping Cai, William M. Faris, Jeffery E. Riley, Robert E. Riley, David P. Tolle, Jon P. Wagner, Shizhong Zhao
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Publication number: 20080032887Abstract: A promoted calcium-alumina supported reforming catalyst that is particularly useful for reforming reactions where low H2/CO ratio synthesis gas, such as less than 2.3 is generated directly is disclosed. The catalyst comprises alumina, from about 0.3 wt % to about 35 wt % calcium oxide, from about 0.1 wt % to about 35 wt % of a strontium promoter, and from about 0.5 wt % to about 30 wt % nickel. The support is prepared by a method wherein the calcium oxide is combined with the alumina to form aluminum-rich calcium aluminates.Type: ApplicationFiled: June 11, 2007Publication date: February 7, 2008Inventors: Chandra Ratnasamy, Yeping Cai, William Faris, Jurgen Ladebeck
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Publication number: 20070249496Abstract: The present development is a catalyst for use in the water-gas-shift reaction. The catalyst includes a Group VIII or Group IB metal, a transition metal promoter selected from the group consisting of rhenium, niobium, silver, manganese, vanadium, molybdenum, titanium, tungsten and a combination thereof, and a ceria-based support. The support may further include gadolinium, samarium, zirconium, lithium, cesium, lanthanum, praseodymium, manganese, titanium, tungsten or a combination thereof. A process for preparing the catalyst is also presented. In a preferred embodiment, the process involves providing “clean” precursors as starting materials in the catalyst preparation.Type: ApplicationFiled: January 11, 2007Publication date: October 25, 2007Inventors: Jon Wagner, Yeping Cai, Aaron Wagner, Michael Balakos
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Publication number: 20070034552Abstract: The present invention is a method for the adsorption of sulfur-containing compounds from a hydrocarbon feedstream, and in particular, an olefin feedstream. The method comprises contacting the sulfur-containing compound with a copper oxide/zinc oxide/aluminum oxide catalyst optionally promoted with a metal.Type: ApplicationFiled: August 15, 2005Publication date: February 15, 2007Inventors: Wayne Turbeville, Nora Yap, Yeping Cai, Jurgen Ladebeck
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Patent number: 7064097Abstract: A process for the preparation of water gas shift catalyst is described. The process includes mixing a copper salt and a zinc salt with an aluminum component in a solution, precipitating a precipitate from the solution, drying an forming the precipitate into the water gas shift catalyst. In an alternate process the aluminum component is prepared separately from the solution of the copper salt and the zinc salt prior to the mixing of the components. After the components are mixed a precipitate is precipitated from the solution, the precipitate is dried and formed into the catalyst.Type: GrantFiled: September 24, 2003Date of Patent: June 20, 2006Assignee: Sud-Chemie Inc.Inventors: Yeping Cai, Sally L. Davies, Jon P. Wagner
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Patent number: 7037876Abstract: A high temperature water gas shift catalyst comprising iron and at least one promoter is prepared via a method which comprises the preparation of a high purity iron precursor and which uses a nominal amount of water in the catalyst production. The catalyst prepared according to the inventive method is more efficient in hydrogen production under the high temperature water gas shift reaction conditions in a fixed bed test than prior art catalysts of similar composition.Type: GrantFiled: August 18, 2003Date of Patent: May 2, 2006Assignee: Sud-Chemie Inc.Inventors: Robert O'Brien, X. D. Hu, Richard Tuell, Yeping Cai
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Publication number: 20060009353Abstract: A promoted calcium-alumina supported reforming catalyst that is particularly useful for reforming reactions where low H2/CO ratio synthesis gas, such as less than 2.3 is generated directly is disclosed. The catalyst comprises from about 25 wt % to about 98 wt % alumina, from about 0.5 wt % to about 35 wt % calcium oxide, from about 0.01 wt % to about 35 wt % of a promoter, and from about 0.05 wt % to about 30 wt % of an active metal. The promoter is selected from the group consisting of titanium, zirconium, yttrium, niobium, elements of the lanthanum-series, such as, without limitation, lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, ytterbium, and combinations thereof. The active metal is selected from the group consisting of nickel, cobalt, rhodium, ruthenium, palladium, platinum, iridium and combinations thereof as active metal, wherein the calcium oxide is combined with the alumina to form aluminum-rich calcium aluminates.Type: ApplicationFiled: October 13, 2004Publication date: January 12, 2006Inventors: Yeping Cai, William Faris, Jeffery Riley, Robert Riley, David Tolle, Jon Wagner, Shizhong Zhao
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Publication number: 20060009352Abstract: A promoted calcium-alumina supported reforming catalyst that is particularly useful for reforming reactions where low H2/CO ratio synthesis gas, such as less than 2.3 is generated directly is disclosed. The catalyst comprises from about 25 wt % to about 98 wt % alumina, from about 0.5 wt % to about 35 wt % calcium oxide, from about 0.01 wt % to about 35 wt % of a promoter, and from about 0.05 wt % to about 30 wt % of an active metal. The promoter is selected from the group consisting of titanium, zirconium, yttrium, niobium, elements of the lanthanum-series, such as, without limitation, lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, ytterbium, and combinations thereof. The active metal is selected from the group consisting of nickel, cobalt, rhodium, ruthenium, palladium, platinum, iridium and combinations thereof as active metal, wherein the calcium oxide is combined with the alumina to form aluminum-rich calcium aluminates.Type: ApplicationFiled: July 9, 2004Publication date: January 12, 2006Inventors: Shizhong Zhao, Yeping Cai, X.D. Hu, Jurgen Ladebeck, Jon Wagner
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Publication number: 20040180786Abstract: A calcium-promoted alumina supported nickel reforming catalyst stabilized with titanium is disclosed. The catalyst is particularly useful for reforming reaction in feed streams containing significant quantities of CO and CO2, low quantities of steam (the feed stream having a H2O/CH4 of less than 0.8 and a CO2/CH4 of greater than 0.5) and relatively high quantities of sulfur compounds (up to about 20 ppm). The catalyst comprises from about 25 wt % to about 98 wt % alumina as a support, from about 2 wt % to about 40 wt % nickel oxide, which is promoted with from about 0.5 wt % to about 35 wt % calcium oxide, and which is stabilized with from about 0.01 wt % to about 20 wt % titanium, wherein the calcium oxide is combined with the alumina to form calcium aluminate. The catalyst can be used in reforming reactions to produce syngas and has advantages in producing low hydrogen to carbon monoxide ratio syngas for applications such as iron ore reduction.Type: ApplicationFiled: March 22, 2004Publication date: September 16, 2004Inventors: Shizhong Zhao, Yeping Cai, Jurgen Ladebeck
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Publication number: 20040077483Abstract: A high temperature water gas shift catalyst comprising iron and at least one promoter is prepared via a method which comprises the preparation of a high purity iron precursor and which uses a nominal amount of water in the catalyst production. The catalyst prepared according to the inventive method is more efficient in hydrogen production under the high temperature water gas shift reaction conditions in a fixed bed test than prior art catalysts of similar composition.Type: ApplicationFiled: August 18, 2003Publication date: April 22, 2004Inventors: Robert O'Brien, X.D. Hu, Richard Tuell, Yeping Cai
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Patent number: 6693057Abstract: A low temperature copper/zinc/aluminum water gas shift catalyst is described. The catalyst is formed from a precursor, wherein the precursor includes aluminum in the form of hydrotalcite and aluminum separate from the hydrotalcite. A method of making the catalyst and a process for using the catalyst are also described.Type: GrantFiled: March 22, 2002Date of Patent: February 17, 2004Assignee: Sud-Chemie Inc.Inventors: Yeping Cai, Sally L. Davies, Jon P. Wagner
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Publication number: 20030186804Abstract: The present development is a catalyst for use in the water-gas-shift reaction. The catalyst includes a Group VIII or Group IB metal, a transition metal promoter selected from the group consisting of rhenium, niobium, silver, manganese, vanadium, molybdenum, titanium, tungsten and a combination thereof, and a ceria-based support. The support may further include gadolinium, samarium, zirconium, lithium, cesium, lanthanum, praseodymium, manganese, titanium, tungsten or a combination thereof. A process for preparing the catalyst is also presented. In a preferred embodiment, the process involves providing “clean” precursors as starting materials in the catalyst preparation.Type: ApplicationFiled: March 28, 2002Publication date: October 2, 2003Applicant: Sud-Chemie, Inc.Inventors: Jon P. Wagner, Yeping Cai, Aaron L. Wagner
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Patent number: 6627572Abstract: A low temperature metal promoted copper/zinc/aluminum water gas shift catalyst is described. The catalyst is formed from a precursor, wherein the precursor includes aluminum in the form of hydrotalcite and aluminum separate from the hydrotalcite. A method of making the catalyst and a process for using the catalyst are also described.Type: GrantFiled: December 17, 2002Date of Patent: September 30, 2003Assignee: Sud-Chemie Inc.Inventors: Yeping Cai, Sally Davies, Jon Wagner
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Patent number: 6350918Abstract: Preparing an aldehyde from an alcohol by contacting the alcohol in the presence of oxygen with a catalyst prepared by contacting an intimate mixture containing metal oxide support particles and particles of a catalytically active metal oxide from Groups VA, VIA, or VIIA, with a gaseous stream containing an alcohol to cause metal oxide from the discrete catalytically active metal oxide particles to migrate to the metal oxide support particles and to form a monolayer of catalytically active metal oxide on said metal oxide support particles.Type: GrantFiled: April 17, 2001Date of Patent: February 26, 2002Assignee: Lehigh UniversityInventors: Israel E. Wachs, Yeping Cai
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Publication number: 20010031899Abstract: The method of the present invention involves a composition containing an intimate mixture of (a) metal oxide support particles and (b) a catalytically active metal oxide from Groups VA, VIA, or VIIA, its method of manufacture, and its method of use for converting alcohols to aldehydes. During the conversion process, catalytically active metal oxide from the discrete catalytic metal oxide particles migrates to the oxide support particles and forms a monolayer of catalytically active metal oxide on the oxide support particle to form a catalyst composition having a higher specific activity than the admixed particle composition.Type: ApplicationFiled: April 17, 2001Publication date: October 18, 2001Inventors: Israel E. Wachs, Yeping Cai
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Patent number: 6245708Abstract: The method of the present invention involves a composition containing an intimate mixture of (a) metal oxide support particles and (b) a catalytically active metal oxide from Groups VA, VIA, or VIIA, its method of manufacture, and its method of use for converting alcohols to aldehydes. During the conversion process, catalytically active metal oxide from the discrete catalytic metal oxide particles migrates to the oxide support particles and forms a monolayer of catalytically active metal oxide on the oxide support particle to form a catalyst composition having a higher specific activity than the admixed particle composition.Type: GrantFiled: April 13, 1999Date of Patent: June 12, 2001Assignee: Lehigh UniversityInventors: Israel E. Wachs, Yeping Cai
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Patent number: 4947482Abstract: A neural network is implemented by discrete-time, continuous voltage state analog device in which neuron, synapse and synaptic strength signals are generated in highly parallel analog circuits in successive states from stored values of the interdependent signals calculated in a previous state. The neuron and synapse signals are refined in a relaxation loop while the synaptic strength signals are held constant. In learning modes, the synaptic strength signals are modified in successive states from stable values of the analog neuron signals. The analog signals are stored for as long as required in master/slaver sample and hold circuits as digitized signals which are periodically refreshed to maintain the stored voltage within a voltage window bracketing the original analog signal.Type: GrantFiled: July 25, 1989Date of Patent: August 7, 1990Assignee: West Virginia UniversityInventor: Paul B. Brown