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| Number | Title | Issue Date |
| 7982083 | Catalyst comprising an EUO zeolite, a 10 MR zeolite and a 12 MR zeolite, and its use in isomerizing aromatic C8 compounds A catalyst is described which comprises at least one zeolite with structure type EUO, at least one zeolite having channels the opening to which is defined by a ring of 10 oxygen atoms (10 MR), at least one zeolite having channels the opening to which is defined by a... | 07/19/2011 |
| 7932426 | Process for isomerizing a non-equilibrium alkylaromatic feed mixture and an aromatic production facility One exemplary embodiment can be a process for the isomerization of a non-equilibrium alkylaromatic feed mixture. The process can include contacting the non-equilibrium alkylaromatic feed mixture in a C8 isomerization zone. The C8 isomerization zone may include a fir... | 04/26/2011 |
| 7745677 | Aromatic isomerization catalyst and isomerization process One exemplary embodiment can be an extruded C8 alkylaromatic isomerization catalyst. The extruded catalyst can include: about 2-about 20%, by weight, of an MTW zeolite; about 80-about 98%, by weight, of a binder in... | 06/29/2010 |
| 7687674 | Low temperature process for recovering and producing para-xylene and heat exchange network therefore Recent experimental work with currently available adsorbents indicates that operating the adsorption section at lower temperatures improves the para-xylene productivity. As a result, an aromatics complex and heat recovery network for a low temperature adsorptive sep... | 03/30/2010 |
| 7439412 | Process for producing para-xylene A process for producing a PX-rich product comprises (a) separating a feedstock containing C8 hydrocarbons to produce a C8 hydrocarbons rich stream; (b) separating at least a first portion of the C8 hydrocarbons rich stream to produce... | 10/21/2008 |
| 7387978 | Selective para-xylene production via methylation of toluene with methanol in the presence of modified HZSM-5 catalyst We disclose a method for converting toluene to xylenes, comprising contacting toluene with methanol in the presence of a silica-bound HZSM-5 catalyst. As an example, in one embodiment the method can include: (i) first silylating HZSM-5, to form silylated HZSM-5; (ii... | 06/17/2008 |
| 7371914 | Xylene isomerization with an added benzene Xylene isomerization processes, especially those processes in which ethylbenzene is also converted, are beneficially affected by adding benzene to the feed. ... | 05/13/2008 |
| 7371912 | Process for making xylene isomer using a deheptanizer with a side draw recycle In processes for recovering one or more xylene isomers and isomerizing the remaining isomers for recycle, the isomerate is distilled to provide a toluene-containing overhead, a mid-boiling fraction containing C8 aromatics and a bottoms fraction containing... | 05/13/2008 |
| 7335295 | Coated zeolite catalysts and use for hydrocarbon conversion There is provided a coated zeolite catalyst in which the accessibility of the acid sites on the external surfaces of the zeolite is controlled and a process for converting hydrocarbons utilizing the coated zeolite catalyst. The zeolite catalyst comprises core crysta... | 02/26/2008 |
| 7326819 | High-activity isomerization catalyst and process A catalyst and process is disclosed to selectively upgrade a paraffinic feedstock to obtain an isoparaffin-rich product for blending into gasoline. The catalyst comprises a support of a sulfated oxide or hydroxide of a Group IVB (IUPAC 4) metal, a first component of... | 02/05/2008 |
| 7314601 | Processes for producing xylenes using isomerization and transalkylation reactions and apparatus therefor Processes for making xylene isomer use integrated transalkylation and isomerization reaction zones to enhance xylene recovery and enable reduction in capital costs and energy consumption. ... | 01/01/2008 |
| 7304193 | Integrated process for aromatics production An aromatics complex flow scheme has been developed. The isomerized xylenes effluent from a xylene recovery zone is recycled to a transalkylation stripper without requiring C8 aromatic hydrocarbons to be separated. This improvement results in an aromatics... | 12/04/2007 |
| 7288687 | Integrated process for aromatics production An aromatics complex flow scheme has been developed in which C7-C8 aliphatic hydrocarbons are recycled to an isomerization unit of a xylene recovery zone to increase the efficiency of the isomerization unit. This improvement results in an aroma... | 10/30/2007 |
| 7271305 | Method of obtaining para-xylene Disclosed herein is an improved method for making and obtaining para-xylene from a mixture of xylene isomers, and various embodiments of the method. The method generally includes contacting a mixture comprising xylene isomers and ethylbenzene with a para-xylene sele... | 09/18/2007 |
| 7270792 | Process for producing para-xylene A process and a system for increasing para-xylene production from a C8 aromatic feedstream by coupling at least one xylene isomerization reactor with at least one pressure swing adsorption unit or temperature swing absorption unit to produce a product hav... | 09/18/2007 |
| 7268263 | Integrated process for aromatics production An aromatics complex flow scheme has been developed. C7-C8 aliphatic hydrocarbons are recycled to an isomerization unit of a xylene recovery zone to increase the efficiency of the isomerization unit. This improvement results in an aromatics com... | 09/11/2007 |
| 7179434 | Integrated apparatus for aromatics production Enabling a transalkylation process to handle both C10 alkylaromatics and unextracted toluene permits the following improvements to be realized. No longer extracting toluene allows a reformate-splitter column to be eliminated. The extraction unit can be mo... | 02/20/2007 |
| 7169368 | Integrated apparatus for aromatics production Enabling a transalkylation process to handle both C10 alkylaromatics and unextracted toluene permits the following improvements to be realized. No longer extracting toluene allows a reformate-splitter column to be eliminated. The extraction unit can be mo... | 01/30/2007 |
| 7151199 | Hydrocarbon conversion processes using non-zeolitic molecular sieve catalysts Hydrocarbon or oxygenate conversion process in which a feedstock is contacted with a non zeolitic molecular sieve which has been treated to remove most, if not all, of the halogen contained in the catalyst. The halogen may be removed by one of several methods. One m... | 12/19/2006 |
| 7148391 | Heavy aromatics processing In a process for converting C9+ aromatic hydrocarbons to lighter aromatic products a feed comprising C9+ aromatic hydrocarbons is contacted under transalkylation reaction conditions with a catalyst composition comprising (i) a first molecular s... | 12/12/2006 |
| 7128883 | Process and apparatus for ethylbenzene production and transalkylation to xylene The use of two transalkylation catalysts to react aromatic compounds of carbon number nine (and heavier carbon numbers) with benzene to form carbon number eight aromatics is disclosed. The two catalyst system preserves ethyl-group species on the heavier aromatics th... | 10/31/2006 |
| 7026268 | Solid acid catalyst containing platinum group metal component and method for preparation thereof The present invention provides a concentration distribution for a platinum group metal component in a catalyst with which catalyst activity can be increased, and to provide a method for supporting a platinum group metal with which this concentration distribution can... | 04/11/2006 |
| 7015175 | High-activity isomerization catalyst and process A catalyst and process is disclosed to selectively upgrade a paraffinic feedstock to obtain an isoparaffin-rich product for blending into gasoline. The catalyst comprises a support of a sulfated oxide or hydroxide of a Group IVB (IUPAC 4) metal, a first component of... | 03/21/2006 |
| 6958425 | Aromatics transalkylation to ethylbenzene and xylenes The use of transalkylation catalysts to react heavy aromatic compounds of carbon number nine (and heavier carbon numbers) with benzene to form carbon number eight aromatics is disclosed. The catalyst system preserves ethyl-group species on the heavier aromatics that... | 10/25/2005 |
| 6924405 | Xylene isomerization A xylene isomerization process is disclosed in which any ethylbenzene in the feed is removed, either by dealkylation or isomerization, in a separate reactor upstream of the xylene isomerization reactor and the xylene isomerization catalyst is contained in the same r... | 08/02/2005 |
| 6890423 | Distillate fuel blends from Fischer Tropsch products with improved seal swell properties The invention provides distillate fuel blend components with improved seal swell and lubricity properties obtained from Fischer Tropsch products. The blends contain a highly paraffinic distillate fuel component and distillate-boiling alkylcycloparaffins and/or disti... | 05/10/2005 |
| 6881873 | High-activity isomerization catalyst and process A catalyst and process is disclosed to selectively upgrade a paraffinic feedstock to obtain an isoparaffin-rich product for blending into gasoline. The catalyst comprises a support of a sulfated oxide or hydroxide of a Group IVB (IUPAC 4) metal, a first component of... | 04/19/2005 |
| 6878855 | Process for producing para-xylene A process and a system for increasing para-xylene production from a C8 aromatic feedstream by coupling at least one xylene isomerization reactor with at least one pressure swing adsorption unit or temperature swing absorption unit to produce a product hav... | 04/12/2005 |
| 6858769 | Lithium aluminate layered catalyst and a selective oxidation process using the catalyst A catalyst for the selective oxidation of hydrogen has been developed. It comprises an inert core such as cordierite and an outer layer comprising a lithium aluminate support. The support has dispersed thereon a platinum group metal and a promoter metal, e.g. platin... | 02/22/2005 |
| 6822130 | Isomerization catalyst with a specific pore size distribution A catalyst composition comprising an alumina carrier, a Group VIII noble metal, and a halogen compound wherein the catalyst composition has total pore volume of more than 0.48 ml/g and wherein at least 50% of this total pore volume resides in pores with a diameter s... | 11/23/2004 |
| 6797849 | Xylene isomerization A process for isomerizing xylenes in a feed containing xylenes is disclosed which process comprises: contacting the feed with a first isomerization catalyst in a first reactor under a first set of conditions effective to isomerize xylenes in the feed; and contacting... | 09/28/2004 |
| 6770792 | Xylene isomerization A xylene isomerization process is disclosed in which any ethylbenzene in the feed is removed, either by dealkylation or isomerization, in a separate reactor upstream of the xylene isomerization reactor and the xylene isomerization catalyst is contained in the same r... | 08/03/2004 |
| 6709570 | Method for preparing a catalyst A method for preparing a catalyst comprising a zeolite and a low acidity refractory oxide binder which is essentially free of alumina which method comprises: (a) preparing an extrudable mass comprising a substantially homogenous mixture of zeolite, water, a s... | 03/23/2004 |
| 6573418 | Process for production of para-xylene incorporating pressure swing adsorption and simulated moving bed adsorption A pressure swing adsorption process to separate para-xylene and ethylbenzene from C8 aromatics which uses a para-selective, non-acidic, medium pore molecular sieve of the MFI structure type and is operated isothermally in the vapor phase at ele... | 06/03/2003 |
| 6528695 | Process for the production of an isomer of xylenes in three stages: separation, isomerization in the presence of a catalyst based on an EUO zeolite and transalkylation The invention relates to a process for the production of at least one isomer of xylenes, preferably paraxylene, as well as benzene, starting from a C8-aromatic fraction, whereby said process comprises a zone for separation of xylenes, a zone for isomeriza... | 03/04/2003 |
| 6518472 | Stabilized dual bed xylene isomerization catalyst system A catalyst system suitable for the isomerization of a xylene and conversion of ethylbenzene in a feed containing xylene and ethylbenzene comprising a first catalyst having activity for the conversion of ethylbenzene, a second catalyst having hydrogenation... | 02/11/2003 |
| 6512154 | Production of a xylene isomer in three stages: separation, isomerization with a catalyst with an EUO zeolite base and transalkylation with recycling of C10-aromatic compounds A process for the production of at least one xylene isomer, paraxylene, metaxylene or orthoxylene from an aromatic feedstock that has 7 to 10 carbon atoms per molecule. The process comprises a stage for transalkylation of C7- and C9-aromatic compounds, a ... | 01/28/2003 |
| 6512155 | Process for the activation of an alkylaromatic isomerization catalyst by water An improved process is disclosed for ethylbenzene and xylene isomerization in a non-equilibrium mixture of xylenes and ethylbenzene. By addition of trace quantities of water to the reaction zone, equivalent isomerization is effected at lower temperatures ... | 01/28/2003 |
| 6433236 | Acid catalyzed isomerization of substituted diaryls A substituted diaryl compound or a mixture of substituted diaryl compounds, such as dimethylbiaryl compounds are isomerized by treatment with a strong acid or mixtures of strong acids in the absence of any additional catalyst. The strong acid or mixture o... | 08/13/2002 |
| 6376733 | Process for production of paraxylene This invention relates to a process and a chemical plant for the production primarily of paraxylene. In particular the process and chemical plant utilise zeolite membranes for enhanced paraxylene production.... | 04/23/2002 |
