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| Number | Title | Issue Date |
| 7396966 | Olefinic feedstock treatment processes Aromatic by-products are sorbed from mono-olefin-containing feedstocks of olefins having from about 6 to 22 carbon atoms per molecule that contain aromatic by-products having from 7 to 22 carbon atoms per molecule. A benzene-containing regenerant displaces and desor... | 07/08/2008 |
| 7169730 | Modified carbide and oxycarbide containing catalysts and methods of making and using thereof Compositions including modified carbide-containing nanorods and/or modified oxycarbide-containing nanorods and/or modified carbon nanotubes bearing carbides and oxycarbides and methods of making the same are provided. Rigid porous structures including modified oxyca... | 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 |
| 6900365 | Process for converting heavy hydrocarbon feeds to high octane gasoline, BTX and other valuable aromatics A catalytic hydrodealkylation/reforming process which comprises contacting a heavy hydrocarbon feedstream under catalytic hydrodealkylation/reforming conditions with a composition comprising borosilicate molecular sieves having a pore size greater than about 5.0 Ang... | 05/31/2005 |
| 6746597 | Supported noble metal nanometer catalyst particles containing controlled (111) crystal face exposure A noble metal nanometer-sized catalyst composition is described along with the method for preparation of the composition. The crystal face of the catalyst contains a preponderance of (111) type crystal phase exposure. The crystal phase exposure is controlled ... | 06/08/2004 |
| RE38532 | Hydrodealkylation processes Carburization and metal-dusting while hydrodealkylating a hydrodealkylatable hydrocarbon are reduced even in the substantial absence of added sulfur. ... | 06/08/2004 |
| 6677496 | Process for the coproduction of benzene from refinery sources and ethylene by steam cracking A process for the coproduction of purified benzene and ethylene is provided. The method comprises providing a first mixture comprising benzene, toluene, and one or more C6 to C7 non-aromatics and separating the majority of the benzen... | 01/13/2004 |
| 6179996 | Selective purge for hydrogenation reactor recycle loop Processes and apparatus for providing improved contaminant removal and hydrogen recovery in hydrogenation reactors, particularly in refineries and petrochemical plants. The improved contaminant removal is achieved by selective purging, by passing gases in... | 01/30/2001 |
| 6096938 | Zeolite catalyst with enhanced dealkylation activity and method for producing same An improved zeolite catalyst having enhanced dealkylation activity is provided. The catalyst is prepared by incorporating fluorine into the zeolite structure. In another embodiment, a transition element such as nickel is additionally incorporated into the... | 08/01/2000 |
| 6040490 | Process for producing aromatic compounds by dealkylation, transalkylation, or disproportionation Aromatic hydrocarbons are efficiently converted by bringing feedstock containing from 5 to 50% by weight of an aromatic hydrocarbon having an ethyl group and a C9 alkyl aromatic hydrocarbon into contact with a catalyst capable of disproportiona... | 03/21/2000 |
| 6018086 | Process for preparing 2,6-dialkylnaphthalene The present invention relates to a process of preparing dialkylnaphthylenes and polyalkylenenaphthyleneates.... | 01/25/2000 |
| 5962758 | Process of producing ethylbenzene using alkylation and transalkylation with propylbenzene destruction Ethylbenzene is produced from benzene and ethylene in an alkylation reactor wherein the feedstocks also contain propylbenzenes and/or components that produce propylbenzene. Polyethylbenzenes are also produced in the process. The ethylbenzene product and u... | 10/05/1999 |
| 5866743 | Hydrodealkylation processes Carburization and metal-dusting while hydrodealkylating a hydrodealkylatable hydrocarbon are reduced even in the substantial absence of added sulfur.... | 02/02/1999 |
| 5856608 | Hydrotreating catalyst composition and processes therefor and therewith A catalyst composition and a process for converting a C9 + aromatic compound such as, for example, 1,2,4-trimethylbenzene to a C6 to C8 aromatic hydrocarbon such as a xylene are disclosed. The composition comprises a zeoli... | 01/05/1999 |
| 5849969 | Hydrodealkylation processes Carburization and metal-dusting while hydrodealkylating a hydrodealkylatable hydrocarbon are reduced even in the substantial absence of sulfur.... | 12/15/1998 |
| 5817903 | Hydrotreating catalyst composition and processes therefor and therewith A catalyst composition and a process for converting a C9 + aromatic compound to C6 to C8 aromatic hydrocarbons such as xylenes are disclosed. The catalyst composition comprises a zeolite and a metal. The process comprises ... | 10/06/1998 |
| 5811615 | Hydrotreating catalyst composition and processes therefor and therewith A catalyst composition and a process for hydrodealkylating a C9 + aromatic compound to a C6 to C8 aromatic hydrocarbon such as a xylene are disclosed. The composition comprises an alumina and hexavalent chromium oxide. The... | 09/22/1998 |
| 5714660 | Catalyst composition and processes therefor and therewith A catalyst composition and a process for hydrodealkylating a C9 + aromatic compound such as, for example, 1,2,4-trimethylbenzene to a C6 to C8 aromatic hydrocarbon such as a xylene are disclosed. The composition comprises ... | 02/03/1998 |
| 5714659 | Catalyst composition and processes therefor and therewith A catalyst composition and a process for hydrodealkylating a C9 + aromatic compound such as, for example, 1,2,4-trimethylbenzene to a C6 to C8 aromatic hydrocarbon such as a xylene are disclosed. The composition comprises ... | 02/03/1998 |
| 5689026 | Hydrodealkylation process A process for hydrodealkylating C9 -C12 alkyl-substituted benzenes (preferably trimethylbenzenes) to C6 -C8 aromatic hydrocarbons (in particular, toluene and xylenes) and C1 -C5 alkanes emp... | 11/18/1997 |
| 5457255 | Catalysts for hydrogenolytic dealkylation and use thereof A catalyst for hydrogenolytic dealkylation comprising rhodium on a crystalline metallo-silicate carrier and a process for hydrogenolytically dealkylating a hydrocarbon mixture mainly comprising alkyl aromatic hydrocarbons in the presence of such a catalys... | 10/10/1995 |
| 5278344 | Integrated catalytic reforming and hydrodealkylation process for maximum recovery of benzene The present invention is an integrated catalytic reforming/hydrodealkylation process that maximizes benzene recovery by incorporating refrigeration and pressure swing adsorption separation units. In the refrigeration separation unit, liquid reformate is u... | 01/11/1994 |
| 5210350 | Method of preparing an alkylated aromatic product with an alkylation zeolite and a dealkylation zeolite A method of preparing an alkylated aromatic product (12) by alkylation of an aromatic compound (1), the alkylation producing several alkylated aromatic products, this method being characterized by the following points: (a) the aromatic compound (1) is rea... | 05/11/1993 |
| 5160500 | Zeolite synthesis using an alcohol or like molecules There is provided a method for preparing a zeolite other than ZSM-5 from a reaction mixture comprising a mixed organic directing agent which is a combination of (a) an organic nitrogen containing compound such as an amine or a quaternary ammonium compound... | 11/03/1992 |
| 4806700 | Production of benzene from light hydrocarbons A process is disclosed for the conversion of a light aliphatic hydrocarbon, such as propane, into benzene and optionally also naphthalene. The feed hydrocarbon is converted to aromatic hydrocarbons in a dehydrocyclodimerization zone. The aromatics, and ot... | 02/21/1989 |
| 4670615 | Hydrocarbon compound conversion A process is provided for converting feedstock comprising aromatic hydrocarbon compounds to product comprising aromatic hydrocarbon compounds which differs from the feedstock over a catalyst composition comprising a crystalline layered silicate material.... | 06/02/1987 |
| 4577049 | Alkylation of durene utilizing high boiling condensed polyaromatic compounds A process is disclosed for dealkylating durene under elevated temperatures and pressures with a polynuclear aromatic compound. The dealkylation is carried out in the presence of a carbon-containing molecular sieve.... | 03/18/1986 |
| 4551235 | Utility conservation in hydrogen recycle conversion processes There is disclosed a system for measuring and controlling the concentration of hydrogen in hydrogen recycle processes used in oil refineries and petrochemical plants. The system is intended to reduce the amount of hydrogen and hydrocarbon vapor circulatin... | 11/05/1985 |
| 4536276 | Hydrogen conservation in hydrogen recycle hydroconversion processes There is disclosed a system for measuring and controlling the concentration of hydrogen in hydrogen recycle processes used in oil refineries and petrochemical plants. The system is intended to permit reduction in hydrogen use in hydrogen-consuming hydroge... | 08/20/1985 |
| 4469909 | Heavy aromatics process This invention provides a catalytic process for converting to BTX a C9 + monocyclic aromatic hydrocarbon feed having a prescribed content of alkyl groups with more than one carbon atom. It further provides a process wherein said conversion is c... | 09/04/1984 |
| 4463206 | Process for producing benzene by hydrodealkylation of a hydrocarbon fraction comprising alkyl-aromatic hydrocarbons, olefinic hydrocarbons and sulfur compounds A stabilized hydrocarbon fraction comprising toluene, xylene, sulfur and olefinic hydrocarbons is converted to benzene by (a) catalytic hydrodesulfuration, (b) hydrodealkylation and (c) catalytic hydrogenation.... | 07/31/1984 |
| 4387261 | Treatment of effluent resulting from conversion of methanol to gasoline in order to decrease durene and produce distillate A process is disclosed for the dealkylation of durene resulting from a methanol to gasoline conversion by contacting a durene-containing fraction with zeolite ZSM-12 at elevated temperatures and pressures.... | 06/07/1983 |
| 4347398 | Process for preparation of 1-methyl-3,5-diisopropyl benzene Charge hydrocarbon stream containing diisopropyl toluene isomers is catalytically treated to recover product stream containing increased proportions of 1-methyl-3,5-diisopropyl benzene.... | 08/31/1982 |
| 4314091 | Preparation of 1-methyl-3,5-diisopropyl benzene from charge streams containing diisopropyl toluene Charge hydrocarbon stream containing diisopropyl toluene isomers is catalytically treated to recover product stream containing increased proportions of 1-methyl-3,5-diisopropyl benzene.... | 02/02/1982 |
| 4247729 | Process for producing high purity benzene A liquid product obtained by hydrodealkylation of hydrocarbon oil containing aromatic hydrocarbons is firstly subjected to rectification, then thus obtained substantially pure benzene is treated with clay substance under a temperature below 120° C. A hig... | 01/27/1981 |
| 4238368 | Water dealkylation catalyst of aromatic hydrocarbons Catalyst for water dealkylation of oil fractions containing monoalkylated or polyalkylated aromatic hydrocarbons, said catalyst containing at least one metal of group VIII in a proportion of 0.1 to 5% by weight on a carrier, characterized in that said car... | 12/09/1980 |
| 4191632 | Process for the production of benzene from hydrocarbon fractions rich in alkyl-aromatic hydrocarbons and containing paraffinic and naphthenic hydrocarbons A process for producing benzene is provided which comprises the steps of subjecting a charge rich in alkylaromatic hydrocarbons and containing 2-20% by weight paraffinic and/or naphthenic hydrocarbons, in a first catalytic zone, to a hydrotreatment in the... | 03/04/1980 |
| 4167533 | Co-production of ethylene and benzene Ethylene and maximum benzene are co-produced via a combination process involving (1) thermal cracking, or pyrolysis, (2) aromatic hydrocarbon separation, or extraction, and, (3) dealkylation of alkyl-substituted aromatics to yield additional benzene. Unco... | 09/11/1979 |
| 4157355 | Combination process for selected aromatic hydrocarbon production Selected aromatic hydrocarbon concentrates--benzene, mixed xylenes, etc.--are produced by way of a combination process which involves catalytic reforming followed by hot flash separation and dealkylation of the separated hot flash liquid phase. Although t... | 06/05/1979 |
| 4115247 | Benzene production by solvent extraction and hydrodealkylation A process for converting a naphtha feedstock to a pure benzene including the steps of: reforming the naphtha; removing a major fraction of C4 - C5 and heavy reformate components to obtain a reformate containing a major portion of C | 09/19/1978 |
