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| Number | Title | Issue Date |
| 7405335 | 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 C6 naphthenes. The pr... | 07/29/2008 |
| 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 |
| 7271303 | Multi-zone process for the production of diesel and aromatic compounds A multi-zone process for the production of low sulfur diesel and aromatic compounds wherein C9+ hydrocarbons are hydrocracked to produce low sulfur diesel and a naphtha boiling range stream which is reformed and transalkylated within reforming ... | 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 |
| 7109389 | Process for the disproportionation and transalkylation of toluene and heavy aromatics A process for the disproportionation and transalkylation of toluene and the heavy aromatics comprises: subjecting a first stream of toluene, and a stream enriched in aromatics of nine carbon atoms to toluene disproportionation and transalkylation reactions in the pr... | 09/19/2006 |
| 6972348 | Catalytic conversion of polycyclic aromatics into xylenes A catalyst, and a process for using the catalyst, that effectively converts and transalkylates indane and C10 and heavier polycyclic aromatics into C8 aromatics is herein disclosed. The catalyst comprises a solid-acid support such as mordenite ... | 12/06/2005 |
| 6573415 | Process for the preparation of mono alkyl aromatic compounds Process for the mono alkylation of a hydrocarbon substrate containing aromatic hydrocarbon compounds comprising contacting the aromatic substrate with an alkylating agent consisting of a mixture of olefinic compounds and poly-alkylated aromatic compounds ... | 06/03/2003 |
| 6207871 | High-purity meta-xylene production process There is provided a process for producing high-purity meta-xylene by converting a hydrocarbon feedstream comprising at least about 5 wt % ethylbenzene and at least about 20 wt % meta-xylene, over a single molecular sieve catalyst under ethylbenzene conver... | 03/27/2001 |
| 6137020 | Alkylation process with reduced heavy residue A process for reducing the amount of undesirable byproducts, for example multi-ring compounds known as heavy residue in a process for the alkylation of an aromatic hydrocarbon with an olefin using a silicalite catalyst is disclosed. The process comprises ... | 10/24/2000 |
| 6008424 | C8 alkylaromatic hydrocarbon production using reversible flow reactive chromatography A process for the transalkylation of benzene, toluene and alkylaromatic hydrocarbons containing nine and ten carbon atoms form alkylaromatic hydrocarbons containing eight carbon atoms has been developed. The fixed bed reaction and adsorption zone contains... | 12/28/1999 |
| 5952536 | Aromatics and toluene/trimethylbenzene gas phase transalkylation processes A gas phase, aromatics transalkylation process that comprises contacting a stream containing aromatic hydrocarbons with a catalyst comprising a zeolite selected from the group consisting of SSZ-26, Al-SSZ-33, CIT-1, SSZ-35, and SSZ-44 in the presence of a... | 09/14/1999 |
| 5919995 | Use of composite catalyst for the dismutation and/or transalkylation of alkylaromatic hydrocarbons The invention concerns the use of a catalyst for the dismutation of alkylaromatic hydrocarbons, preferably for the dismutation of toluene to produce benzene and xylenes, and/or for the transalkylation of alkylaromatic hydrocarbons, preferably for the tran... | 07/06/1999 |
| 5877373 | C8 alkylaromatic hydrocarbon production using reversible flow reactive chromatography A process for the transalkylation of benzene, toluene and alkylaromatic hydrocarbons containing 9 and 10 carbon atoms and at least one methyl or ethyl group to form alkylaromatic hydrocarbons containing 8 carbon atoms has been developed. The benzene, tolu... | 03/02/1999 |
| 5789641 | Process for dismutation and/or transalkylation of alyklaromatic hydrocarbons in the presence of two zeolitic catalysts The invention concerns the dismutation of alkylaromatic hydrocarbons, preferably the dismutation of toluene to produce benzene and xylenes, and/or the transalkylation of alkylaromatic hydrocarbons, preferably the transalkylation of toluene and trimethylbe... | 08/04/1998 |
| 5773678 | Use of an omega zeolite based catalyst comprising at least one metal from groups IIa, IVb, IIb or IVa for the dismutation and/or transalkylation of alkylaromatic hydrocarbons The invention concerns the use of a catalyst comprising at least one zeolite having a mazzite type structure in its acid form, the catalytic properties of the catalyst having been modified by depositing, on the external surface of the crystals, at least o... | 06/30/1998 |
| 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 |
| 5670704 | Selective production of 2,6-dimethylnaphthalene A method for the highly selective production of 2,6-dimethlynaphthalene by the transmethylation of naphthalene or 2-methylnaphthalene by the use of a specific acid catalyst and a highly regeospecific methylating agent.... | 09/23/1997 |
| 5625103 | Continuous toluene disproportionation process There is provided a continuous toluene disproportionation process to selectively produce para-xylene. The process includes a steady-state of operation, wherein the conversion of toluene and selectivity to para-xylene is maintained at essentially constant ... | 04/29/1997 |
| 5522984 | Modified zeolite beta, processes for preparation and use thereof This invention relates to a novel zeolite which has the crystal structure of zeolite beta. The novel zeolite SN-beta has a unique infrared absorbance spectrum, shows enhanced activity for transalkylation of di-isopropyl-benzene and shows less deactivation... | 06/04/1996 |
| 5227556 | Turbulent flow process, monoalkyl aromatic production process and reactor for such process A process for turbulently flowing together reactants in uniform proportions in a reactor vessel. A process for producing ethylbenzene by reacting ethylene and benzene in the presence of a catalyst in a reactor vessel from which useful heat generated by th... | 07/13/1993 |
| 5210355 | Selective production of 2,6-methylethylnaphthalene A method for the highly selective production of 2,6-methylethylnaphthalene involving the use of a specific acid catalyst and a highly regeospecific ethylating agent.... | 05/11/1993 |
| 5177286 | Selective production of a p-alkyltoluene or 4,4'-alkylmethylbiphenyl A method for the highly selective production of a p-alkyltoluene or 4,4'-alkylmethylbiphenyl involving the use of a specific Lewis acid catalyst and a highly regeospecific methylating agent.... | 01/05/1993 |
| 5171917 | Selective production of a p-alkylethylbenzene or 4,4'-alkylethylbiphenyl A method for the highly selective production of a p-alkylethylbenzene or 4,4'-alkylethylbiphenyl involving the use of a Lewis acid or Bronsted acid alkylation catalyst and a highly regiospecific ethylating agent.... | 12/15/1992 |
| 5110778 | Boron aluminum and gallium perfluoro alkanesulfonate and resinsulfonate catalysts Boron, aluminum and gallium C1 -C18 perfluoroalkane-sulfonates (CF3 (CF2)n SO3)3 M (M=B, A1, Ga; n=0-17) as well as perfluororesin sulfonates such as Nafionates are new, highly effect... | 05/05/1992 |
| 5087783 | Transalkylation of benzene in a moving bed An improved process for the alkylation of benzene in the presence of an alkylation catalyst. The catalyst bed may be caused to move in a direction countercurrent to the movement of the benzene and olefin, or a portion of the catalyst bed is periodically r... | 02/11/1992 |
| 5073653 | Aromatic alkylation processes Process for the alkylation of aromatic substrates with a C2 -C4 alkylating agent over an alkylation catalyst comprising zeolite omega at moderate temperature conditions and under pressure to provide liquid phase conditions. The liqui... | 12/17/1991 |
| 5030784 | Process for converting lower-alkyl substituted aromatic compounds and butadiene to 4-aryl-1-butene or 4-aryl-1-pentene and propylene The instant invention relates to a process for converting methyl- and/or ethyl-substituted benzene or naphthalene and butadiene to 4-aryl-1-butene or 4-aryl-1-pentene and propylene by: a) reacting a methyl- and/or ethyl-substituted benzene or naphthalene and ... | 07/09/1991 |
| 5008480 | Process for converting toluene and butadiene to styrene and 1-pentene The instant invention relates to a process for converting toluene and butadiene to styrene and 1-pentene by: (a) reacting touene and 1,3-butadiene in the presence of an alkali metal catalyst, (b) contacting the butenylated reaction product of step (a) with a d... | 04/16/1991 |
| 4992608 | Method for preparing cumene Cumene is prepared by alkylation of benzene with propylene, or by transalkylation of diisopropylbenzenes in the presence of benzene, on a silica and alumina gel catalyst which is amorphous to X-rays and has an SiO2 /Al2 O3... | 02/12/1991 |
| 4983274 | Shape selective crystalline silicate zeolite containing intermetallic component and use as catalyst in hydrocarbon conversions The catalytic properties of a metal-containing shape selective crystalline silicate zeolite are significantly improved by converting said metal to an intermetallic compound. Thus, for example, zeolite beta containing the intermetallic component platinum z... | 01/08/1991 |
| 4956511 | Toluene disproportionation process Process for the disproportionation of toluene over a nickel modified mordenite catalyst in which catalyst activity and aging quality are enhanced for carrying out the disproportionation reaction under relatively low temperature conditions with small incre... | 09/11/1990 |
| 4950824 | Process for the production of 2,6-diisopropylnaphthalene A process for the production of 2,6-diisopropylnaphthalene is disclosed wherein an isopropylation reaction mixture containing isopropylated naphthalenes is subjected to transalkylation with a triisopropylnaphthalene-containing mixture to obtain a mixture ... | 08/21/1990 |
| 4943553 | Method of making ethylbiphenyls This invention relates to a method of making ethylbiphenyls by the reaction of biphenyl with polyethylbenzenes or with ethylene and polyethylbenzenes in the presence of a solid acid catalyst and offers advantages of industrial significance such as absence... | 07/24/1990 |
| 4899009 | Method for producing m-benzyltolune A method for producing m-benzyltoluene with a high yield and excellent selectivity without producing undesirable heavier by-products. The method is characterized in that toluene and diphenylmethane are allowed to react at a reaction temperature in the ran... | 02/06/1990 |
| 4891458 | Liquid phase alkylation or transalkylation process using zeolite beta A process for the alkylation or transalkylation of an aromatic hydrocarbon which comprises contacting the aromatic hydrocarbon with a C2 to C4 olefin alkylating agent or a polyalkyl aromatic hydrocarbon transalkylating agent, under a... | 01/02/1990 |
