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| Number | Title | Issue Date |
| 6066251 | Reforming process using a catalyst system with differentiated acid properties 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 fee... | 05/23/2000 |
| 6015932 | Reactivation of a high-activity isomerization catalyst 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, pref... | 01/18/2000 |
| 6013173 | Selective bifunctional multimetallic reforming catalyst 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 convers... | 01/11/2000 |
| 6008423 | Selective aromatics disproportionation/transalkylation 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 Lew... | 12/28/1999 |
| 6001241 | BTX from naphtha without extraction 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 ... | 12/14/1999 |
| 5958216 | Catalytic reforming process with multiple zones 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... | 09/28/1999 |
| 5935415 | Continuous catalytic reforming process with dual zones 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 contai... | 08/10/1999 |
| 5922923 | Zeolitic reforming with selective feed-species adjustment 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 raffi... | 07/13/1999 |
| 5898090 | Aromatic isomerization using a modified silicoaluminophosphate 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 co... | 04/27/1999 |
| 5885439 | Catalytic reforming process with multiple zones 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... | 03/23/1999 |
| 5885443 | Reforming with selective multimetallic multigradient catalyst 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 m... | 03/23/1999 |
| 5883032 | Selective multimetallic multigradient reforming catalyst 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 m... | 03/16/1999 |
| 5880051 | Reforming catalyst system with differentiated acid properties 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 fee... | 03/09/1999 |
| 5858908 | Selective multimetallic-multigradient reforming catalyst A novel catalyst and the use thereof in a reforming process is disclosed. The dual-function catalyst comprises a refractory inorganic oxide, indium, Group IVA(IUPAC 14) metal, and a platinum-group metal concentrated in the surface layer of each catalyst p... | 01/12/1999 |
| 5858205 | Multizone catalytic reforming process 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. Effl... | 01/12/1999 |
| 5858209 | Catalytic reforming process with increased aromatics yield A processing step is added to an existing catalytic reforming unit to increase the yield of aromatic product. The additional processing comprises separation of product from the reforming unit into an aromatic concentrate and a low-octane recycle stream wh... | 01/12/1999 |
| 5831139 | Production of aliphatic gasoline A process combination is disclosed to selectively upgrade naphtha in accordance with expected trends leading to more-aliphatic gasolines. Such gasolines contain lower concentrations of aromatics and have lower end points with concomitant reduced harmful a... | 11/03/1998 |
| 5792338 | BTX from naphtha without extraction A hydrocarbon feedstock is catalytically reformed in a sequence comprising a continuous-reforming zone associated with continuous catalyst regeneration, a zeolitic-reforming zone containing a catalyst comprising a platinum-group metal and a nonacidic L-ze... | 08/11/1998 |
| 5770045 | Modified riser-reactor reforming process A catalytic reforming process uses 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-reforming reactor, in which the re... | 06/23/1998 |
| 5770042 | Upgrading of cyclic naphthas A process combination is disclosed to selectively upgrade naphtha to obtain an isoparaffin-rich product for blending into gasoline. A naphtha feedstock is subjected to ring cleavage to convert naphthenes to paraffins using a nonacidic catalyst followed by... | 06/23/1998 |
| 5755956 | Stable, high-yield reforming catalyst A reforming process, selective for the dehydrocyclization of paraffins to aromatics, is effected using a catalyst containing multiple Group VIII (8-10) noble metals having different gradients within the catalyst and a nonacidic large-pore molecular sieve.... | 05/26/1998 |
| 5744673 | Activated zeolite beta and its use for hydrocarbon conversion The present invention relates to a zeolite beta catalyst characterized by critical limits of weak and strong acid species and exceptionally high catalytic activity. The catalyst is activated at a temperature effective to substantially reduce the concentra... | 04/28/1998 |
| 5683573 | Continuous catalytic reforming process with dual zones 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 contai... | 11/04/1997 |
| 5672265 | Catalytic reforming process with increased aromatics yield A processing step is added to an existing catalytic reforming unit to increase the yield of aromatic product. The additional processing comprises separation of product from the reforming unit into an aromatic concentrate and a low-octane recycle stream wh... | 09/30/1997 |
| 5665223 | Selective bifunctional multimetallic reforming catalyst 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, and europium in a specified ratio. Utilization of this catalyst in the reformin... | 09/09/1997 |
| 5659099 | Activated zeolite beta and its use for hydrocarbon conversion The present invention relates to a zeolite beta catalyst characterized by critical limits of weak and strong acid species and exceptionally high catalytic activity. The catalyst is activated at a temperature effective to substantially reduce the concentra... | 08/19/1997 |
| 5658453 | Integrated aromatization/trace-olefin-reduction scheme A process combination is disclosed to selectively upgrade naphtha in a manner to obtain an aromatics-rich, low-olefin product from the combination. Preferably the naphtha is subjected to aromatization to obtain an aromatics concentrate which is upgraded b... | 08/19/1997 |
| 5614082 | Catalytic reforming process with sulfur arrest A catalyst system comprises a physical mixture of a conversion catalyst and a sulfur sorbent to accommodate small quantities of sulfur from a hydrocarbon feedstock. Preferably, the physical mixture comprises a sulfur-sensitive reforming catalyst protected... | 03/25/1997 |
| 5614454 | Stable, high-yield reforming catalyst A reforming process, selective for the dehydrocyclization of paraffins to aromatics, is effected using a catalyst containing multiple Group VIII (8-10) noble metals having different gradients within the catalyst and a nonacidic large-pore molecular sieve.... | 03/25/1997 |
| 5569791 | Production of phenol from a hydrocarbon feedstock Phenol is produced from a hydrocarbon feedstock using a process combination offering unexpected synergy. Benzene is produced from the hydrocarbon feedstock using a highly selective aromatization catalyst which provides substantial quantities of high-purit... | 10/29/1996 |
| 5565090 | Modified riser-reactor reforming process A catalytic reforming process uses 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-reforming reactor, in which the re... | 10/15/1996 |
| 5559068 | Reforming/dehydrocyclization catalysts Reforming is effected with a combination of a primary supported noble-metal catalyst and a catalyst containing one or more medium-pore non-zeolitic molecular sieves (MP-NZMS). The latter reforming and dehydrocyclization catalysts comprise a Group VIII met... | 09/24/1996 |
| 5559274 | Production of phenol from a hydrocarbon feedstock Phenol is produced from a hydrocarbon feedstock using a process combination offering unexpected synergy. Benzene is produced from the hydrocarbon feedstock using a highly selective aromatization catalyst which provides substantial quantities of high-purit... | 09/24/1996 |
| 5520796 | Reforming/dehydrocyclization catalysts Reforming is effected with a combination of a primary supported noble-metal catalyst and a catalyst containing one or more medium pore non-zeolite molecular sieves (MP-NZMS). The latter reforming and dehydrocyclization comprise a Group VIII metal and at l... | 05/28/1996 |
| 5516957 | Discrete molecular sieve and use This invention presents a novel MgAPSO molecular sieve, containing a critical range of magnesium in the sieve framework and having a small crystallite size, which is particularly active for hydrocarbon conversion. The sieve advantageously is incorporated,... | 05/14/1996 |
| 5510559 | Selectivity in hydrocarbon conversion An improved process is disclosed for the conversion of hydrocarbons, using a catalyst comprising a non-zeolitic molecular sieve which has been activity-moderated by controlled carbon deposition. It is of particular interest in skeletal isomerization to in... | 04/23/1996 |
| 5507939 | Catalytic reforming process with sulfur preclusion A hydrocarbon feedstock is catalytically reformed to effect dehydrocyclization of paraffins in a process combination comprising a first reforming zone, a sulfur-removal zone containing a mixed reforming catalyst and sulfur sorbent comprising a manganese c... | 04/16/1996 |
| 5498810 | Selective isoparaffin synthesis from naphtha A process combination is disclosed to selectively upgrade naphtha to obtain products suitable for further upgrading to reformulated fuels. A naphtha feedstock is hydrogenated to saturate aromatics, followed by selective isoparaffin synthesis to yield ligh... | 03/12/1996 |
| 5478787 | Discrete molecular sieve and use This invention presents a novel MgAPSO molecular sieve, containing a critical range of magnesium: in the sieve framework and having a small crystallite size, which is particularly active for hydrocarbon conversion. The sieve advantageously is incorporated... | 12/26/1995 |
| 5472593 | BTX from naphtha without extraction A hydrocarbon feedstock is catalytically reformed in a sequence comprising a 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 platinum-g... | 12/05/1995 |
