| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 585470000 | By alkyl or aryl transfer between molecules, e.g., disproportionation, etc. | 44 |
| 20080249345 | Process and Apparatus for Para-Xylene Production - A process of producing PX comprising providing a C | 10-09-2008 |
| 20080281137 | Process of Using a High Activity Catalyst for the Transalkylation of Aromatics - A process for producing an alkylated aromatic compound from polyalkylated aromatic compound(s) having bi-alkylated aromatic compound(s) and tri-alkylated aromatic compound(s), comprising the step of contacting alkylatable aromatic compound(s) with the polyalkylated aromatic compound(s) at a transalkylation condition in the presence of a transalkylation catalyst. The transalkylation catalyst has high activity sufficient to achieve a ratio of bi-alkylated aromatic compound(s) conversion over tri-alkylated aromatic compound(s) conversion in a range of from about 0.5 to about 2.5. | 11-13-2008 |
| 20090005623 | Solid Phosphoric Acid With Controlled Porosity - The present invention relates to a solid phosphoric acid catalyst and a process for conversion of hydrocarbons using a solid phosphoric acid catalyst. The solid phosphoric acid catalyst comprises silicon orthophosphate, and has a silicon orthophosphate to silicon pyrophosphate ratio of at least about 5:1. The total pore volume of the solid phosphoric acid catalyst is at least about 0.17 cm | 01-01-2009 |
| 20090036724 | Xylene Production Processes With Integrated Feedstock Treatment - A process for aromatic transalkylation and olefin reduction of a feed stream is disclosed. Transalkylation conditions provide a product having increased xylene concentration and reduced olefin concentration relative to the feed. The process may be used in a xylene production facility to minimize or avoid the necessity of feedstock pretreatment such as hydrotreating, hydrogenation, or treating with clay and/or molecular sieves. | 02-05-2009 |
| 20090069612 | METHOD FOR COMBINED PRODUCTION OF PARAXYLENE AND BENZENE WITH IMPROVED PRODUCTIVITY - A process for the combined production of para-xylene and benzene comprises:
| 03-12-2009 |
| 20100022814 | CATALYTIC TRANSALKYLATION OF DIALKYL BENZENES - The present invention relates to a method for performing catalytic transalkylation between long-chain dialkyl benzenes and benzene in order to obtain monoalkyl benzenes. As dialkyl benzene source, this method employs the by-products of a method for alkylation of benzene with linear C | 01-28-2010 |
| 20100261941 | Process for the Purification of Paraxylene - The proposed process uses crystallization technology to purify paraxylene simultaneously of large concentrations of C8 aromatics and also small concentrations of oxygenated species. | 10-14-2010 |
| 20100305379 | Transalkylation of Heavy Alkylate Using a Layered Catalyst - A layered catalyst is disclosed for use in transalkylation of polyalkylated benzenes. The catalyst comprises an inner core material with a molecular sieve bonded over the core. The process minimizes the cracking of the alkyl groups during the transalkylation reaction. | 12-02-2010 |
| 20110046427 | XYLENE PRODUCTION PROCESSES WITH INTEGRATED FEEDSTOCK TREATMENT - A process for aromatic transalkylation and olefin reduction of a feed stream is disclosed. Transalkylation conditions provide a product having increased xylene concentration and reduced olefin concentration relative to the feed. The process may be used in a xylene production facility to minimize or avoid the necessity of feedstock pretreatment such as hydrotreating, hydrogenation, or treating with clay and/or molecular sieves. | 02-24-2011 |
| 20110178356 | PROCESS FOR INCREASING A MOLE RATIO OF METHYL TO PHENYL - One exemplary embodiment can be a process for increasing a mole ratio of methyl to phenyl of one or more aromatic compounds in a feed. The process can include reacting an effective amount of one or more aromatic compounds and an effective amount of one or more aromatic methylating agents to form a product having a mole ratio of methyl to phenyl of at least about 0.1:1 greater than the feed. | 07-21-2011 |
| 20120083639 | PROCESSES FOR MAXIMIZING HIGH-VALUE AROMATICS PRODUCTION UTILIZING STABILIZED CRUDE BENZENE WITHDRAWAL - Processes for maximizing high-value aromatics production utilizing stabilized crude benzene withdrawal are provided. Aromatic reactor effluent comprising a C | 04-05-2012 |
| 20130190546 | BENZENE ALKYLATION WITH STAGED ALKANE INJECTION - A process for making an alkylated aromatic is described. The alkylating agent is introduced into the reactor in at least two positions. This decreases the propane/benzene ratio at each injection point, improving the methylation reagent selectivity. | 07-25-2013 |
| 20140288342 | Metathesis Reactions - Described herein an apparatus and methods used to remove unwanted by-products of metathesis reactions. | 09-25-2014 |
| 20140357916 | Rhenium Promoted Catalyst - A group V metal/rhenium-modified molecular sieve catalyst can be used in hydrocarbon conversion reactions. Embodiments can provide a toluene conversion of at least 30 wt % with selectivity to benzene above 40 wt % and to xylenes above 40 wt % and non-aromatics selectivity of less than 2.0 wt %. | 12-04-2014 |
| 20150038755 | PROCESSES AND SYSTEMS FOR SEPARATING STREAMS TO PROVIDE A TRANSALKYLATION FEED STREAM IN AN AROMATICS COMPLEX - A process and system for the production of at least one xylene isomer is provided. The process includes passing a first stream to one side of a split shell fractionation column and a second stream to the other side of the column. The first stream has a higher ratio of methyl to C2+ alkyl-substituted C9 aromatic compounds than the second stream. A bottoms stream from the one side is separated and passed as feed to a transalkylation zone. | 02-05-2015 |
| 20150094507 | APPARATUSES AND METHODS FOR ISOLATING C8 AROMATICS - Apparatuses and methods are provided for isolating C8 aromatics from hydrocarbon streams. In one embodiment, a method for separating C8 aromatics from a hydrocarbon stream includes introducing the hydrocarbon stream to a fractionation column at a feed point. Further, the method includes fractionating the hydrocarbon stream in the fractionation column. Also, the method includes withdrawing a sidedraw fraction from the fractionation column at a draw point located above the feed point, wherein the sidedraw fraction includes C8 aromatics. | 04-02-2015 |
| 20150094508 | SYSTEMS AND METHODS FOR SEPARATING XYLENE ISOMERS USING SELECTIVE ADSORPTION - Methods and systems are provided for separating a selected xylene isomer. The method includes separating a feed stream including a plurality of aromatic hydrocarbons into a first stream including toluene and isomers of xylene, and a second stream including isomers of xylene. The method further includes separating the first stream into a third stream including toluene and a fourth stream including isomers of xylene. The method further includes combining the second stream and the third stream in an adsorptive separation unit including an adsorbent configured to adsorb the selected xylene isomer from the second stream. The third stream desorbs the selected xylene isomer to produce a fifth stream including the selected xylene isomer and toluene and a sixth stream including non-selected xylene isomers and toluene. Still further, the method includes separating the sixth stream into a seventh stream including the non-selected xylene isomers and the third stream including toluene. | 04-02-2015 |
| 20150119620 | Synthesis of Crystalline Molecular Sieves Having the EUO Framework Type - In a process for the synthesis of a crystalline molecular sieve material having the EUO framework type, a synthesis mixture is provided suitable for the formation of an EUO framework type molecular sieve and comprising N,N,N,N′,N′,N′-hexamethylhexanediammonium, Q, cations and a colloidal suspension of seed crystals of an EUO framework type molecular sieve. The synthesis mixture is crystallized and an EUO framework type molecular sieve in the form individual crystals and/or aggregates of crystals having an average size, d | 04-30-2015 |
| 20160060189 | TRANSALKYLATION / DISPROPORTIONATION OR THERMAL HYDRODEALKYLATION HYDROCARBON PROCESSING METHODS AND SYSTEMS EMPLOYING AN INCREASED ETHYLBENZENE FEED CONTENT - Methods and apparatus for processing hydrocarbons are provided. In one example, a method for processing hydrocarbons includes the step of providing feed stream including toluene, ethylbenzene, mixed xylenes, and C | 03-03-2016 |
| 585471000 | Product is polycyclic, of increased side-chain length, or a specific position polyalkyl benzene isomer | 3 |
| 20080262280 | Integrated process for producing xylenes and high purity benzene - Processes and apparatus are provided that provide high yields of xylenes per unit of aromatic-containing feed while enabling a high purity benzene co-product to be obtained without the need for an extraction or distillation to remove C | 10-23-2008 |
| 20110009683 | SYNTHESIS OF SUBSTITUTED FLUORENE LIGANDS - The present invention describes a cost-efficient method for preparing di-substituted fluorenes in high yield. | 01-13-2011 |
| 20130225891 | Bimetallic Catalyst and Use in Xylene Production - The invention is directed to a bimetallic catalyst system adapted for the manufacture of xylenes, a process for making said catalyst system, and to the process of manufacture of xylenes using said catalyst system, providing, in embodiments, improved selectivity by at least one of higher ethylene saturation and low xylene loss, decreased susceptibility to poisoning from feedstream impurities, and ability to operate at less severe conditions. | 08-29-2013 |
| 585474000 | Plural compounds of different weight become midweight compound, i.e., averaging | 1 |
| 20140094633 | Alkylation of Aromatic Substrates and Transalkylation Process - A process for transalkylation of polyalkylated aromatic components can include providing a transalkylation reaction zone containing a transalkylation catalyst. A feedstock can be introduced into an inlet of the transalkylation reaction zone and into contact with the transalkylation catalyst. The feedstock can include a polyalkylated aromatic component derived from an aromatic substrate. The aromatic substrate can be supplied to the transalkylation reaction zone. The transalkylation reaction zone can be operated at temperature and pressure conditions sufficient to cause disproportionation of the polyalkylated aromatic component to produce a disproportionation product having a reduced polyalkylated aromatic content and an enhanced monoalkylated aromatic content. The disproportionation product can be withdrawn from the transalkylation reaction zone. Amounts of nitrogen containing compounds in the aromatic substrate can be monitored in a range of from 15 to 35 wppm by dry colorimetry. | 04-03-2014 |
| 585475000 | Using crystalline aluminosilicate catalyst | 21 |
| 20080221375 | Catalyst Treatment Useful for Aromatics Conversion Process - A process for preparing a transalkylation catalyst, the catalyst itself, and a transalkylation process for using the catalyst are herein disclosed. The catalyst comprises rhenium metal on a solid-acid support such as mordenite, which has been treated with a sulfur-based agent. Such treatment reduces the amount of methane produced by metal hydrogenolysis in a transalkylation process wherein heavy aromatics like A | 09-11-2008 |
| 20080306318 | Process for Producing Para-Xylene - A process for producing a PX-rich product comprises (a) separating a feedstock containing C | 12-11-2008 |
| 20080319243 | Toluene disproportionation catalyst - A process for the disproportionation of a toluene containing feedstock employing a nickel modified mordenite catalyst comprising particulate mordenite having nickel dispersed throughout the catalyst particles to provide surface nickel and interior nickel within the mordenite crystal structure. The catalyst is pretreated to selectively deactivate the surface nickel to provide a surface nickel content of reduced catalytic activity. The interior nickel thus has a higher catalytic activity than the surface nickel. The feedstock is supplied to a reaction zone containing the catalyst to cause disproportionation of toluene in the feedstock to produce a mixture of benzene and xylene. The non-aromatic content of the product is less than the non-aromatic content of a corresponding disproportionation product which would be produced by the disproportionation of the feedstream in the presence of a corresponding nickel mordenite catalyst which has not been pretreated. | 12-25-2008 |
| 20090112034 | Heavy Aromatics Processing Catalyst and Process of Using the Same - This disclosure relates to a catalyst system adapted for transalkylation a C | 04-30-2009 |
| 20100041933 | Catalyst and Process for Hydrocarbon Conversions - A nickel-mordenite catalyst promoted with Rhodium that is useful in the conversion of hydrocarbons is disclosed. The catalyst and methods for its use can provide hydrocarbon conversion with an extended catalyst life as compared to nickel-mordenite catalyst not promoted with Rhodium. | 02-18-2010 |
| 20100041934 | Toluene Disproportionation Using Nb/Mordenite Catalyst - A molecular sieve catalyst useful in the conversion of hydrocarbons containing niobium is disclosed, along with a process for the disproportionation of toluene to benzene and xylene using such catalyst. | 02-18-2010 |
| 20100185035 | Nb/Mordenite Transalkylation Catalyst - A niobium-modified mordenite catalyst can be made from water soluble niobium precursors such as niobium oxalate and ammonium niobate(V) oxalate and can be used in toluene disproportionation reactions. Embodiments can provide a toluene conversion of at least 30 wt % of the toluene feed with selectivity to benzene above 40 wt % of the reaction product composition and to xylenes above 40 wt % of the reaction product composition and non-aromatics selectivity of less than 1.0 wt % of the reaction product composition. | 07-22-2010 |
| 20100191028 | Process for Preparing Ethylbenzene Using Vapor Phase Alkylation and Liquid Phase Transalkylation - Disclosed are ethylbenzene processes in which a series-arranged or combined vapor phase alkylation/transalkylation reaction zone is retrofitted to have a vapor phase alkylation reactor and a liquid phase transalkylation reactor, and in which a parallel-arranged vapor phase alkylation reactor and vapor phase transalkylation reactor is retrofitted to have a vapor phase alkylation reactor and liquid phase transalkylation reactor, wherein the xylenes content of the ethylbenzene product is less than 700 wppm. | 07-29-2010 |
| 20110295048 | Rhenium Promoted Catalyst - A group V metal/rhenium-modified molecular sieve catalyst can be used in hydrocarbon conversion reactions. Embodiments can provide a toluene conversion of at least 30 wt % with selectivity to benzene above 40 wt % and to xylenes above 40 wt % and non-aromatics selectivity of less than 2.0 wt %. | 12-01-2011 |
| 20120116139 | MULTIPLE ZEOLITE CATALYST - The multiple zeolite catalyst is a catalytic composition used to convert C | 05-10-2012 |
| 20130090507 | MULTIPLE ZEOLITE CATALYST AND METHOD OF USING THE SAME FOR TOLUENE DISPROPORTIONATION - The multiple zeolite catalyst is a catalytic composition used to convert alkylaromatic hydrocarbons to BTX, particularly to commercially valuable xylenes. The catalyst is formed by mixing at least two zeolites selected from mordenite, beta zeolite, ZSM-5, ZSM-11, ZSM-12, ZSM-22, ZSM-23, MFI topology zeolite, NES topology zeolite, EU-1, MAPO-36, SAPO-5, SAPO-11, SAPO-34, and SAPO-41, and adding at least one metal component selected from Group VI of the Periodic Table of the Elements. The two zeolites have different physical and chemical characteristics, such as pore size and acidity. An exemplary catalyst includes mordenite, ZSM-5, and 3 wt % molybdenum. The multiple zeolite catalyst may further be used to convert toluene to mixed xylene isomers, particularly with a ZSM-5:mordenite ratio of 2:1 by weight. | 04-11-2013 |
| 20130144100 | SYNTHESIS OF HIGH ACTIVITY LARGE CRYSTAL ZSM-5 - In a process for preparing a high activity, large crystal ZSM-5 type zeolite in the absence of a template, a reaction mixture can be prepared comprising water, a silica source having a surface area less than 150 m | 06-06-2013 |
| 20130184509 | Methods of Making Xylene Isomers - Disclosed herein are methods of making xylene isomers. The methods generally include contacting an aromatics-comprising feed with a non-sulfided catalyst under conditions suitable for converting the feed to a product comprising xylene isomers. The catalyst includes a support impregnated with a hydrogenation component. The support includes a macroporous binder and a sieve selected from the group consisting of a medium pore sieve, a large pore sieve, and mixtures thereof. The selection of the sieve will depend upon the size of the molecules in the feed, intermediate, and product that can be expected from the catalytic reactions. When the molecules are expected to be large, a large pore sieve should be used. In contrast, when the molecules are expected to be smaller, either a large pore sieve, a medium pore sieve, or a mixture thereof may be used. The macropores within the support have been found to be especially beneficial because they help to overcome diffusional limitations observed when utilizing highly-active catalysts lacking such macropores. | 07-18-2013 |
| 20130253247 | Catalysts, Processes for Preparing the Catalysts, and Processes for Transalkylating Aromatic Hydrocarbon Compounds - A catalyst comprising an aluminosilicate zeolite having an MOR framework type, an acidic MFI molecular sieve component having a Si/Al | 09-26-2013 |
| 20130261364 | Multimetal Zeolites Based Catalyst for Transalkylation of Heavy Reformate to Produce Xylenes and Petrochemical Feedstocks - A transalkylation catalyst for the transalkylation of a heavy reformate is provided. The catalyst includes two solid acid zeolites having different physical and chemical properties, and at least three metals selected from the group 4 Lanthanoids, and the elements found in groups 6 and 10 of the periodic table. | 10-03-2013 |
| 20130261365 | Process for the Production of Xylenes and Light Olefins from Heavy Aromatics - A method for the transalkylation of a heavy reformate is provided. The heavy reformate is contacted with a transalkylation catalyst and hydrogen gas in a transalkylation reactor to selectively convert the heavy reformate to a xylenes-rich product stream. Light alkanes produced during the reaction can be supplied to a steam cracker where they are converted to light olefins. | 10-03-2013 |
| 20130331628 | Rhenium Promoted Catalyst - A group V metal/rhenium-modified molecular sieve catalyst can be used in hydrocarbon conversion reactions. Embodiments can provide a toluene conversion of at least 30 wt % with selectivity to benzene above 40 wt % and to xylenes above 40 wt % and non-aromatics selectivity of less than 2.0 wt %. | 12-12-2013 |
| 20140100403 | LOW PRESSURE TRANSALKYLATION PROCESS - A process for transalkylation is described. The process operates at a lower pressure than a typical transalkylation processes, and provides higher benzene purity with comparable or lower ring loss compared to the typical transalkylation process. The xylene selectivity is comparable to or higher than the standard process, and the ethyl benzene selectivity is comparable to or lower than the standard process. | 04-10-2014 |
| 20140163286 | AROMATIC TRANSALKYLATION USING UZM-39 ALUMINOSILICATE ZEOLITE - A new family of coherently grown composites of TUN and IMF zeotypes has been synthesized and shown to be effective catalysts for aromatic transalkylation reactions. These zeolites are represented by the empirical formula. | 06-12-2014 |
| 20150328626 | SILICATE-COATED MFI-TYPE ZEOLITE, METHOD OF PRODUCING THE SAME, AND METHOD OF PRODUCING P-XYLENE USING THE SAME - A silicate-coated MFI-type zeolite is obtained by coating an MFI-type zeolite with a silicate, and a peak area ratio b/a of a peak b at 2θ=8.4 to 9.7° to a peak a at 2θ=7.0 to 8.4° in an X-ray diffraction spectrum is 1 or more, and a pKa value measured by a Hammett indicator is +3.3 or more. | 11-19-2015 |
| 20160176787 | Transalkylation Process | 06-23-2016 |
