Patents Represented by Attorney, Agent or Law Firm Richard E. Conser
-
Patent number: 6177002Abstract: A hydrocarbon feedstock is catalytically reformed in a sequence comprising a first bifunctional-catalyst reforming zone, a zeolitic-reforming zone containing a catalyst comprising a platinum-group metal and a nonacidic zeolite, and a terminal bifunctional catalyst reforming zone. The first and terminal bifunctional catalysts preferably comprise a lanthanide-series metal component. The process combination permits higher severity, higher aromatics yields and/or increased throughput relative to the known art, and is particularly useful in connection with moving-bed reforming facilities with continuous catalyst regeneration.Type: GrantFiled: July 1, 1999Date of Patent: January 23, 2001Assignee: UOP LLCInventor: Bryan K. Glover
-
Patent number: 6132595Abstract: A reforming process, selective for the dehydrocyclization of paraffins to aromatics, is effected using a catalyst containing a uniformly distributed platinum-group metal component, a surface-layer metal component comprising one or more of the Group IVA metals, indium, Group VIIB (IUPAC 7) metals, iron, zinc, gold and bismuth and a nonacidic large-pore molecular sieve. The use of this bed of catalyst results in greater selectivity of conversion of paraffins to aromatics and in improved catalyst stability.Type: GrantFiled: March 23, 1999Date of Patent: October 17, 2000Assignee: UOP LLCInventors: Paula L. Bogdan, Qianjun Chen
-
Patent number: 6114592Abstract: An improved process combination is disclosed for the selective disproportionation of toluene. The combination comprises selective hydrogenation of a toluene feedstock followed by disproportionation using a zeolitic catalyst which is oil-dropped in an aluminum phosphate binder to achieve a high yield of paraxylene. Optionally, the catalyst is selectively precoked prior to toluene disproportionation. The catalyst and process provide improved selectivity for the production of paraxylene.Type: GrantFiled: December 17, 1998Date of Patent: September 5, 2000Assignee: UOP LLCInventors: Gregory J. Gajda, Edwin P. Boldingh
-
Patent number: 6066251Abstract: A catalyst system comprising a physical mixture of particles of a non-acidic large-pore zeolite containing a platinum-group metal and particles comprising a refractory inorganic oxide which is metal-free is effective for the reforming of a hydrocarbon feedstock. Reforming of paraffinic feedstocks to effect aromatization, particularly of a raffinate from aromatics extraction, provides improved activity in producing gasoline-range products when using the catalyst system of the invention.Type: GrantFiled: December 15, 1998Date of Patent: May 23, 2000Assignee: UOP LLCInventors: Qianjun Chen, Paula L. Bogdan
-
Patent number: 6063977Abstract: An improved catalyst and process are disclosed for the selective disproportionation of toluene. The process uses a zeolitic catalyst which is oil-dropped in an aluminum phosphate binder and has an X-ray diffraction pattern showing characteristic intensities at specified Bragg angles. Optionally, the catalyst is selectively precoked prior to toluene disproportionation. The catalyst and process provide improved selectivity for the production of paraxylene.Type: GrantFiled: December 17, 1998Date of Patent: May 16, 2000Assignee: UOP LLCInventors: Gregory J. Gajda, Edwin P. Boldingh, Jennifer S. Holmgren
-
Patent number: 6036845Abstract: A catalytic reforming process comprises a prereactor which provides an intermediate stream to a riser reactor with multiple catalyst injection points to obtain high aromatics yields from a naphtha feedstock. Product from the riser reactor typically is discharged into a fluidized-bed reforming reactor, in which the reforming reaction is completed and catalyst is separated from hydrogen and hydrocarbons. Hydrocarbons from the reactor are separated to recover an aromatized product. Catalyst is regenerated to remove coke and reduced for reuse in the reforming process.Type: GrantFiled: May 4, 1998Date of Patent: March 14, 2000Assignee: UOP LLCInventors: Gregory A. Funk, Christopher D. Gosling, Paula L. Bogdan
-
Patent number: 6015932Abstract: A reactivation process is disclosed for a catalyst formulated to selectively upgrade naphtha to obtain an isoparaffin-rich product for blending into gasoline. The process utilizes a solid strong-acid catalyst comprising an anion-modified metal oxide, preferably comprising a sulfated support of an oxide or hydroxide of a Group IVB (IUPAC 4) metal, and a platinum-group metal component.Type: GrantFiled: August 28, 1998Date of Patent: January 18, 2000Assignee: UOP LLCInventor: Stanley J. Frey
-
Patent number: 6013173Abstract: A novel catalyst and the use thereof in a reforming process is disclosed. The catalyst comprises a refractory inorganic oxide, platinum-group metal, Group IVA(IUPAC 14) metal, indium and lanthanide-series metal. Utilization of this catalyst in the conversion of hydrocarbonsaromatics product.Type: GrantFiled: December 9, 1996Date of Patent: January 11, 2000Assignee: UOP LLCInventor: Paula L. Bogdan
-
Patent number: 6008423Abstract: An improved process is disclosed for the selective disproportionation and transalkylation of toluene. The process uses a zeolitic catalyst, preferably comprising a binder, containing a weak metal in a defined reduced state which is believed to provide Lewis acidity in the catalyst. The catalyst and process provide improved selectivity for the production of paraxylene.Type: GrantFiled: December 8, 1997Date of Patent: December 28, 1999Assignee: UOP LLCInventors: Jennifer S. Holmgren, Douglas B. Galloway, Leonid B. Galperin, Richard R. Willis
-
Patent number: 6001241Abstract: A hydrocarbon feedstock is catalytically reformed in a sequence comprising a zeolitic-reforming zone containing a catalyst comprising a platinum-group metal and a nonacidic L-zeolite and an aromatics-isomerization zone containing a catalyst comprising a medium-pore molecular sieve, a platinum-group metal and a refractory inorganic oxide. Optionally, the zeolitic-reforming zone is preceded by a continuous-reforming zone associated with continuous catalyst regeneration, The process combination features high selectivity in producing a high-purity BTX product from naphtha.Type: GrantFiled: August 10, 1998Date of Patent: December 14, 1999Assignee: UOP LLCInventors: Christopher D. Gosling, Robert S. Haizmann, Bryan K. Glover
-
Patent number: 5958216Abstract: A hydrocarbon feedstock is catalytically reformed in a sequence comprising a first bifunctional-catalyst reforming zone, a zeolitic-reforming zone containing a catalyst comprising a platinum-group metal and a nonacidic zeolite, and a terminal bifunctional catalyst reforming zone. The first and terminal bifunctional catalysts preferably comprise a lanthanide-series metal component. The process combination permits higher severity, higher aromatics yields and/or increased throughput relative to the known art, and is particularly useful in connection with moving-bed reforming facilities with continuous catalyst regeneration.Type: GrantFiled: December 18, 1998Date of Patent: September 28, 1999Assignee: UOP LLCInventor: Bryan K. Glover
-
Patent number: 5935415Abstract: A hydrocarbon feedstock is catalytically reformed in a sequence comprising a continuous-reforming zone, consisting essentially of a moving-bed catalytic reforming zone and continuous regeneration of catalyst particles, and a zeolitic-reforming zone containing a catalyst comprising a platinum-group metal and a nonacidic zeolite. The process combination permits higher severity, higher aromatics yields and/or increased throughput in the continuous-reforming zone, thus showing surprising benefits over prior-art processes, and is particularly useful in upgrading existing moving-bed reforming facilities with continuous catalyst regeneration.Type: GrantFiled: November 4, 1997Date of Patent: August 10, 1999Assignee: UOP LLCInventors: Robert S. Haizmann, John Y. G. Park, Michael B. Russ
-
Patent number: 5922923Abstract: The feedstock to an aromatization process is processed by a selective adsorption step to remove hydrocarbon species, particularly indan, which have a severe adverse effect on aromatization catalyst stability. The feedstock preferably is a paraffinic raffinate from aromatics extraction. The intermediate from the adsorption step is particularly suitable for the selective conversion of paraffins to aromatics using a high-activity dehydrocyclization catalyst with high aromatics yields and long catalyst life.Type: GrantFiled: September 27, 1996Date of Patent: July 13, 1999Assignee: UOP LLCInventors: John Y. G. Park, Santi Kulprathipanja, Robert S. Haizmann
-
Patent number: 5898090Abstract: This invention is drawn to a process for isomerizing a non-equilibrium mixture of xylenes and ethylbenzene using a silicoaluminophosphate molecular sieve which is enriched in framework silicon at the surface, resulting in a greater yield of para-xylene compared to prior-art processes.Type: GrantFiled: December 17, 1997Date of Patent: April 27, 1999Assignee: UOP LLCInventors: John Ivor Hammerman, Edith Marie Flanigen, Gregory J. Gajda, Jennifer S. Holmgren, David A. Lesch, Robert Lyle Patton, Thomas Matthew Reynolds, Cara Moy Roeseler
-
Patent number: 5885439Abstract: A hydrocarbon feedstock is catalytically reformed in a sequence comprising a first bifunctional-catalyst reforming zone, a zeolitic-reforming zone containing a catalyst comprising a platinum-group metal and a nonacidic zeolite, and a terminal bifunctional catalyst reforming zone. The process combination permits higher severity, higher aromatics yields and/or increased throughput relative to the known art, and is particularly useful in connection with moving-bed reforming facilities with continuous catalyst regeneration.Type: GrantFiled: November 4, 1997Date of Patent: March 23, 1999Assignee: UOP LLCInventor: Bryan K. Glover
-
Patent number: 5885443Abstract: A reforming process, selective for the dehydrocyclization of paraffins to aromatics, is effected using a catalyst containing a uniformly distributed platinum-group metal component, a surface-layer metal component comprising one ore more of the Group IVA metals and indium and a nonacidic large-pore molecular sieve. The use of this bed of catalyst results in greater selectivity of conversion of paraffins to aromatics and in improved catalyst stability.Type: GrantFiled: June 17, 1998Date of Patent: March 23, 1999Assignee: UOP LLCInventors: Paula L. Bogdan, Qianjun Chen
-
Patent number: 5883032Abstract: A reforming process, selective for the dehydrocyclization of paraffins to aromatics, is effected using a catalyst containing a uniformly distributed platinum-group metal component, a surface-layer metal component comprising one one more of the Group IVA metals and indium and a nonacidic large-pore molecular sieve. The use of this bed of catalyst results in greater selectivity of conversion of paraffins to aromatics and in improved catalyst stability.Type: GrantFiled: November 21, 1996Date of Patent: March 16, 1999Assignee: UOP LLCInventors: Paula L. Bogdan, Qianjun Chen
-
Patent number: 5880051Abstract: A catalyst system comprising a physical mixture of particles of a non-acidic large-pore zeolite containing a platinum-group metal and particles comprising a refractory inorganic oxide which is metal-free is effective for the reforming of a hydrocarbon feedstock. Reforming of paraffinic feedstocks to effect aromatization, particularly of a raffinate from aromatics extraction, provides improved activity in producing gasoline-range products when using the catalyst system of the invention.Type: GrantFiled: October 23, 1996Date of Patent: March 9, 1999Assignee: UOP LLCInventors: Qianjun Chen, Paula L. Bogdan
-
Patent number: 5858205Abstract: A hydrocarbon feedstock is catalytically reformed in a process which comprises at least three catalyst zones. The feedstock contacts a catalyst comprising platinum, a halogen, and a metal promoter on a solid catalyst support in a first catalyst zone. Effluent from the first catalyst zone contacts a catalyst comprising platinum, germanium and halogen on a solid catalyst support in an intermediate catalyst zone to obtain an intermediate effluent, which contacts a catalyst having the essential absence of germanium and comprising platinum, halogen and a metal promoter on a solid catalyst support in a terminal catalyst zone to obtain a reformate.Type: GrantFiled: May 13, 1997Date of Patent: January 12, 1999Assignee: UOP LLCInventor: Aronson L. Huebner
-
Patent number: D473334Type: GrantFiled: June 29, 1998Date of Patent: April 15, 2003Inventor: Eric P. Conser