Patents by Inventor Tin-Tack P. Cheung
Tin-Tack P. Cheung 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: 20040260131Abstract: This invention relates to acetylene removal catalysts and their use in the hydrogenating of highly unsaturated hydrocarbons to less unsaturated hydrocarbons in an olefin rich hydrocarbon stream in the presence of hydrogen and a catalyst composition under conditions effective to convert said highly unsaturated hydrocarbon to a less unsaturated hydrocarbon. Said catalyst composition comprises palladium, silver, potassium, and an inorganic support material, wherein the catalyst composition contains less than about 0.3 weight % potassium. In the presence of sulfur-containing impurities, the catalysts of the present invention yield a much smaller increase in T1 (cleanup temperature) and higher ethylene selectivity is achieved.Type: ApplicationFiled: June 23, 2003Publication date: December 23, 2004Applicant: Chevron Phillips Chemical Company ("CPCHEM")Inventors: Joseph J. Bergmeister, Gary A. Delzer, Tin-Tack P. Cheung
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Publication number: 20040192983Abstract: A catalyst for the selective hydrogenation of acetylene comprising a support having a uniformly round external surface; palladium in the range of about 0.01 to 1.0 weight percent of the catalyst and substantially all of the palladium being concentrated in a skin periphery of the catalyst; and silver in the range of about 0.5 to 10.0 times the weight of the palladium. Preferably, the support is selected from the group consisting of alumina, titania, zirconia, zinc aluminate, zinc titanate and mixtures thereof, and/or the skin has a thickness less than about 400 microns.Type: ApplicationFiled: February 10, 2004Publication date: September 30, 2004Applicant: Chevron Phillips Chemical Co.Inventors: Joseph J. Bergmeister, Tin-Tack P. Cheung, Gary A. Delzer
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Patent number: 5625101Abstract: 1,3-butadiene is cyclodimerized to 4-vinylcyclohexene in the presence of at least one copper(I) sulfonate as the catalyst.Type: GrantFiled: June 30, 1995Date of Patent: April 29, 1997Assignee: Phillips Petroleum CompanyInventors: Tin-Tack P. Cheung, Marvin M. Johnson
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Patent number: 5585318Abstract: C.sub.2 -C.sub.6 alkynes (preferably acetylene) contained in feeds which also contain sulfur impurities are hydrogenated to the corresponding alkenes in the presence of a supported palladium catalyst which has been promoted with alkali metal fluoride (preferably potassium fluoride). A specific cataylst consists essentially of a palladium component, at least one alkali metal fluoride (preferably KF) and an inorganic support material (preferably alumina).Type: GrantFiled: November 20, 1995Date of Patent: December 17, 1996Assignee: Phillips Petroleum CompanyInventors: Marvin M. Johnson, Tin-Tack P. Cheung
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Patent number: 5583274Abstract: C.sub.2 -C.sub.6 alkynes (preferably acetylene) contained in feeds which also contain sulfur impurities are hydrogenated to the corresponding alkenes in the presence of a supported palladium catalyst which has been promoted with alkali metal fluoride (preferably potassium fluoride).Type: GrantFiled: January 20, 1995Date of Patent: December 10, 1996Assignee: Phillips Petroleum CompanyInventors: Tin-Tack P. Cheung, Marvin M. Johnson
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Patent number: 5510550Abstract: A catalyst composition comprising palladium, silver and a support material (preferably alumina) is contacted at a relatively low temperature (of up to about 60.degree. C.) with a liquid composition comprising an effective reducing agent (preferably an alkali metal borohydride, hydrazinc, formaldehyde, formic acid, ascorbic acid, dextrose, aluminum powder). Preferably, at least one alkali metal compound (more preferably KOH, RbOH, CsOH, KF) is also present in the liquid composition. An improved process for selectively hydrogenating acetylene (to ethylene) employs this wet-reduced catalyst composition.Type: GrantFiled: May 19, 1995Date of Patent: April 23, 1996Assignee: Phillips Petroleum CompanyInventors: Tin-Tack P. Cheung, Marvin M. Johnson, Scott H. Brown, Stan A. Zisman, James B. Kimble
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Patent number: 5489565Abstract: A supported catalyst composition, which is effective as a diolefin hydrogenation catalyst, comprises palladium, silver and alkali metal fluoride. This catalyst composition is employed in the selective hydrogenation of C.sub.4 -C.sub.10 diolefins (preferably 1,3-butadiene) with hydrogen gas to the corresponding monoolefins.Type: GrantFiled: April 6, 1995Date of Patent: February 6, 1996Assignee: Phillips Petroleum CompanyInventors: Tin-Tack P. Cheung, Marvin M. Johnson
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Patent number: 5488024Abstract: A catalyst composition comprising palladium, silver and a support material (preferably alumina) is contacted at a relatively low temperature (of up to about 60.degree. C.) with a liquid composition comprising an effective reducing agent (preferably an alkali metal borohydride, hydrazine, formaldehyde, formic acid, ascorbic acid, dextrose, aluminum powder). Preferably, at least one alkali metal compound (more preferably KOH, RbOH, CsOH, KF) is also present in the liquid composition. An improved process for selectively hydrogenating acetylene (to ethylene) employs this wet-reduced catalyst composition.Type: GrantFiled: July 1, 1994Date of Patent: January 30, 1996Assignee: Phillips Petroleum CompanyInventors: Tin-Tack P. Cheung, Marvin M. Johnson, Scott H. Brown, Stan A. Zisman, James B. Kimble
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Patent number: 5475173Abstract: A supported catalyst composition, which is effective as a diolefin hydrogenation catalyst, comprises palladium, silver and alkali metal fluoride. This catalyst composition is employed in the selective hydrogenation of C.sub.4 -C.sub.10 diolefins (preferably 1,3-butadiene) with hydrogen gas to the corresponding monoolefins.Type: GrantFiled: July 19, 1994Date of Patent: December 12, 1995Assignee: Phillips Petroleum CompanyInventors: Tin-Tack P. Cheung, Marvin M. Johnson
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Patent number: 5360779Abstract: A solid combination of elemental sulfur and an inorganic support material (preferably alumina), is contacted with at least one liquid C.sub.5 -C.sub.12 alkane and/or cycloalkane, followed by substantially removing the C.sub.5 -C.sub.12 hydrocarbon from the thus-contacted solid combination of elemental sulfur and inorganic support. This process improves the trialkyl arsine absorption capacity of the solid combination.Type: GrantFiled: October 14, 1993Date of Patent: November 1, 1994Assignee: Phillips Petroleum CompanyInventors: Tin-Tack P. Cheung, Marvin M. Johnson
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Patent number: 5208405Abstract: A process for selectively hydrogenating C.sub.4 -C.sub.10 diolefins to the corresponding monoolefins is carried out with a catalyst comprising (a) nickel metal and/or compound(s), (b) silver metal and/or compound(s), and (c) a solid inorganic support material (preferably alumina).Type: GrantFiled: March 3, 1992Date of Patent: May 4, 1993Assignee: Phillips Petroleum CompanyInventors: Tin-Tack P. Cheung, Marvin M. Johnson
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Patent number: 5096681Abstract: Trialkyl arsine (in particular trimethyl arsine) is removed from a fluid (e.g., a hydrocarbon-containing gas) by contacting the fluid with a sorbent material comprising vanadium pentoxide (V.sub.2 O.sub.5) and an inorganic support material (preferably alumina or silica or vanadium metal).Type: GrantFiled: February 22, 1991Date of Patent: March 17, 1992Assignee: Phillips Petroleum CompanyInventor: Tin-Tack P. Cheung
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Patent number: 5085844Abstract: Trialkyl arsine (in particular trimethyl arsine) is removed from a fluid (e.g., a hydrocarbon-containing gas) by contacting the fluid with a sorbent material comprising (a) elemental sulfur, and (b) an inorganic support material, preferably alumina and/or silica and/or titania and/or activated carbon.Type: GrantFiled: November 28, 1990Date of Patent: February 4, 1992Assignee: Phillips Petroleum CompanyInventors: Gerhard P. Nowack, Tin-Tack P. Cheung
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Patent number: 5024683Abstract: Trialky arsine(s) are removed from a fluid (e.g., a hydrocarbon-containing gas) by contacting the fluid with a sorbent material comprising (a) copper sulfide, preferably copper(I) sulfide, and (b) an inorganic support material, preferably zinc oxide and/or alumina.Type: GrantFiled: June 12, 1990Date of Patent: June 18, 1991Assignee: Phillips Petroleum CompanyInventors: Patricia A. Tooley, Tin-Tack P. Cheung, Ted H. Cymbaluk, Gerhard P. Nowack, Marvin M. Johnson