Patents by Inventor Teh Chung Ho
Teh Chung Ho 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: 7390664Abstract: The present invention relates to an apparatus and a process for the high-throughput, quick screening, optimization, regeneration, reduction and activation of catalysts. More specifically, the present invention is a method and apparatus to quickly screen, optimize and regenerate multiple fast deactivating catalysts while maintaining a predefined range of time-on-stream.Type: GrantFiled: December 20, 2002Date of Patent: June 24, 2008Assignee: ExxonMobil Research and Engineering CompanyInventors: Shun Chong Fung, Teh Chung Ho
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Patent number: 7288182Abstract: A process for hydroprocessing petroleum and chemical feedstocks by use of a bulk multimetallic catalyst comprised of at least one Group VIII non-noble metal and at least one, preferably two Group VIB metal wherein the ratio of Group VIB metal to Group VIII metal is from about 10:1 to 1:10.Type: GrantFiled: January 14, 2000Date of Patent: October 30, 2007Assignee: ExxonMobil Research and Engineering CompanyInventors: Stuart Leon Soled, Sabato Miseo, Roman Krycak, Hilda B. Vroman, Teh Chung Ho, Kenneth Lloyd Riley
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Publication number: 20040121470Abstract: The present invention relates to an apparatus and a process for the high-throughput, quick screening, optimization, regeneration, reduction and activation of catalysts. More specifically, the present invention is a method and apparatus to quickly screen, optimize and regenerate multiple fast deactivating catalysts while maintaining a predefined range of time-on-stream.Type: ApplicationFiled: December 20, 2002Publication date: June 24, 2004Inventors: Shun Chong Fung, Teh Chung Ho
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Publication number: 20020043478Abstract: A cavitation enhanced atomizing process comprises forming a flowing solution of the liquid to be atomized and a lower boiling cavitating liquid. This flowing solution is then contacted with a pressure reducing means, at a temperature below the bubble point of the cavitating liquid in the solution, to produce cavitation bubbles. These bubbles comprise cavitation liquid vapor and the bubble nucleation produces a two-phase fluid of the bubbles and liquid solution. The two-phase fluid is passed downstream into and through an atomizing means, such as an orifice, and into a lower pressure atomizing zone, in which the bubbles vaporize to form a spray of liquid droplets. The nucleated bubbles also grow in size as the so-formed two-phase fluid passes downstream to and through the atomizing means.Type: ApplicationFiled: August 6, 2001Publication date: April 18, 2002Inventors: Dean C. Draemel, Nicholas C. Nahas, Teh Chung Ho
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Patent number: 6171476Abstract: A cavitation enhanced atomizing process comprises forming a flowing solution of the liquid to be atomized and a lower boiling cavitating liquid. This flowing solution is then contacted with a pressure reducing means, at a temperature below the bubble point of the cavitating liquid in the solution, to produce cavitation bubbles. These bubbles comprise cavitation liquid vapor and the bubble nucleation produces a two-phase fluid of the bubbles and liquid solution. The two-phase fluid is passed downstream into and through an atomizing means, such as an orifice, and into a lower pressure atomizing zone, in which the bubbles vaporize to form a spray of liquid droplets. The nucleated bubbles also grow in size as the so-formed two-phase fluid passes downstream to and through the atomizing means.Type: GrantFiled: March 18, 1999Date of Patent: January 9, 2001Assignee: Exxon Research and Engineering CompanyInventors: Dean C. Draemel, Nicholas C. Nahas, Teh Chung Ho
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Patent number: 6156189Abstract: The present invention is directed to a Fluid Catalytic Cracking process conducted under fluid catalytic cracking conditions by injecting into at least one reaction zone of a fluid catalytic cracking unit (FCCU) having one or more risers, a plurality of feeds wherein said plurality of feeds comprises at least one feed (.alpha.) and at least another feed (.beta.) wherein said feeds (.alpha.) and (.beta.) (a) differ in Conradson Carbon Residue by at least about 2 wt % points; or (b) differ in hydrogen content by at least about 0.2 wt %; or (c) differ in API gravities by at least about 2 points; or (d) differ in nitrogen content by at least about 50 ppm; or (e) differ in carbon-to-hydrogen ratio by at least about 0.3; or (f) differ in mean boiling point by at least about 200.degree. F; and wherein said feeds (.alpha.) and (.beta.) are alternately injected and wherein said alternate injection maintains said risers in a cyclic steady state, while the rest of the FCC unit is in a steady state.Type: GrantFiled: April 20, 1999Date of Patent: December 5, 2000Assignee: Exxon Research and Engineering CompanyInventors: Teh Chung Ho, Shun Chong Fung, Daniel Paul Leta
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Patent number: 6123832Abstract: The invention relates to Fluid Catalytic Cracking (FCC) for producing liquid fuels and light olefins from liquid hydrocarbon mixtures such as petroleum fractions.Type: GrantFiled: January 14, 1999Date of Patent: September 26, 2000Assignee: Exxon Research and Engineering Co.Inventors: Teh Chung Ho, Shun Chong Fung, Gordon Frederick Stuntz, Robert Charles Welch, Daniel Paul Leta
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Patent number: 5958224Abstract: The instant invention is directed to a process for removing hard sulfurs from hydrocarbon streams by selectively oxidizing hard sulfurs in a hydrotreated stream, under oxidizing conditions in the presence of an effective amount of an oxidizing agent, wherein the oxidizing agent is a peroxometal complex and wherein the hard sulfurs are oxidized into the corresponding sulfoxides and sulfones.Type: GrantFiled: August 14, 1998Date of Patent: September 28, 1999Assignee: Exxon Research and Engineering CoInventors: Teh Chung Ho, Chang Samuel Hsu, Gerald Dennis Dupre, Ronald Liotta, Viktor Buchholz
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Patent number: 5841013Abstract: The present invention is directed toward a hydrogenation process using a highly active aromatics hydrogenation catalyst. The catalyst is prepared by decomposing a catalyst precursor selected from the group consisting of metal amine molybdates, metal amine tungstates and mixtures thereof, wherein said metal amine catalyst precursor has the general formula ML (Mo.sub.y W.sub.1-y O.sub.4).sub.a where M is Cr and/or one or more divalent promoter metals selected from the group consisting of Mn, Fe, Co, Ni, Cu and Zn; L is one or more neutral nitrogen-containing ligands at least one of which is a chelating polydentate ligand; 0.ltoreq.y.ltoreq.1; and a=1 for non-chromium containing catalysts and wherein 0.5.ltoreq.a.ltoreq.3 for chromium containing catalysts, at a temperature of about 200.degree. C. to about 400.degree. C. in an inert atmosphere; then reducing at a temperature of about 300.degree. C. to about 450.degree. C.Type: GrantFiled: May 16, 1997Date of Patent: November 24, 1998Assignee: Exxon Research and Engineering CompanyInventors: Teh Chung Ho, Charles Ralph Symon, Viktor Buchholz, Michel Daage
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Patent number: 5831138Abstract: The present invention is directed toward a catalyst composition comprising a catalyst prepared by a process comprising: (a) impregnating an oxide precursor selected from the group consisting of rare earth oxide precursors, yttria precursors and mixtures thereof, onto an inorganic refractory oxide support; (b) drying said support at a temperature of about 100.degree. to about 120.degree. C. followed by calcining said support at a temperature of about 400.degree. to about 600.degree. C.; and (c) compositing or depositing on said support of step (b), a catalyst precursor salt represented by (ML)(Mo.sub.y W.sub.1-y O.sub.4).sub.a wherein M comprises Cr and/or one or more divalent promoter metals selected from the group consisting of Mn, Fe, Co, Ni, Cu, Zn and mixtures thereof, wherein y is any value ranging from 0 to 1, and wherein L is one or more neutral, nitrogen-containing ligands at least one of which is a chelating polydentate ligand; a=1 when chromium is not one of the promoter metals and 0.5.ltoreq.a.Type: GrantFiled: August 15, 1997Date of Patent: November 3, 1998Assignee: Exxon Research and Engineering CompanyInventors: Teh Chung Ho, Stuart Leon Soled, Sabato Miseo, Gary Brice McVicker, Michel Daage, Viktor Buchholz
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Patent number: 5767037Abstract: The present invention is directed toward a highly active aromatics hydrogenation catalyst and its use. The catalyst composition is prepared by:(a) decomposing a catalyst precursor selected from the group consisting of metal amine molybdates, metal amine tungstates and mixtures thereof, wherein said metal amine catalyst precursor has the general formulaML(Mo.sub.y W.sub.1-y O.sub.4)awhere M is Cr and/or one or more divalent promoter metals selected from the group consisting of Mn, Fe, Co, Ni, Cu and Zn; L is one or more neutral nitrogen containing ligands at least one of which is a chelating polydentate ligand; 0.ltoreq.y.ltoreq.1; and a=1 for non-chromium containing catalysts and wherein 0.5.ltoreq.a.ltoreq.3 for chromium containing catalysts, at a temperature of about 200.degree. to about 400.degree. C. in an inert atmosphere; and(b) reducing at a temperature of about 300.degree. to about 450.degree. C. said metal amine catalyst precursor to form a catalyst.Type: GrantFiled: August 18, 1995Date of Patent: June 16, 1998Assignee: Exxon Research and Engineering CompanyInventors: Teh Chung Ho, Charles R. Symon, Viktor Buchholz, Michel Daage
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Patent number: 5728644Abstract: The present invention is directed toward a catalyst composition comprising a catalyst prepared by a process comprising: (a) impregnating an oxide precursor selected from the group consisting of rare earth oxide precursors, yttria precursors and mixtures thereof, onto an inorganic refractory oxide support; (b) drying said support at a temperature of about 100.degree. to about 120.degree. C. followed by calcining said support at a temperature of about 400.degree. to about 600.degree. C.; and (c) compositing or depositing on said support of step (b), a catalyst precursor salt represented by (ML)(Mo.sub.y W.sub.1-y O.sub.4).sub.a wherein M comprises Cr and/or one or more divalent promoter metals selected from the group consisting of Mn, Fe, Co, Ni, Cu, Zn and mixtures thereof, wherein y is any value ranging from 0 to 1, and wherein L is one or more neutral, nitrogen-containing ligands at least one of which is a chelating polydentate ligand; a=1 when chromium is not one of the promoter metals and 0.5.ltoreq.a.Type: GrantFiled: September 5, 1995Date of Patent: March 17, 1998Assignee: Exxon Research and Engineering CompanyInventors: Teh Chung Ho, Stuart Leon Soled, Sabato Miseo, Gary Brice Mc Vicker, Michel Daage, Viktor Buchholz
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Patent number: 5648577Abstract: The present invention is directed toward a catalyst composition prepared by a process comprising: (a) impregnating an oxide precursor selected from the group consisting of rare earth oxide precursors, yttria precursors and mixtures thereof, onto an inorganic refractory oxide support; (b) drying said support at a temperature of about 100.degree. to about 120.degree. C. followed by calcining said support at a temperature of about 400.degree. to about 600.degree. C.; and (c) compositing or depositing on said support of step (b), a catalyst precursor salt represented by (ML)(Mo.sub.y W.sub.1-y O.sub.4).sub.a wherein M comprises Cr and/or one or more divalent promoter metals selected from the group consisting of Mn, Fe, Co, Ni, Cu, Zn and mixtures thereof, wherein y is any value ranging from 0 to 1, and wherein L is one or more neutral, nitrogen-containing ligands at least one of which is a chelating polydentate ligand; a=1 when chromium is not one of the promoter metals and 0.5.ltoreq.a.ltoreq.Type: GrantFiled: June 2, 1995Date of Patent: July 15, 1997Assignee: Exxon Research and Engineering CompanyInventors: Teh Chung Ho, Stuart Leon Soled, Sabato Miseo, Gary Brice McVicker, Michel Daage, Viktor Buchholz