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| Number | Title | Issue Date |
| 8168844 | Catalytic compositions for the highly selective hydrodealkylation of alkylaromatic hydrocarbons Process for the catalytic hydrodealkylation alone of hydrocarbon compositions comprising C8-C13 alkylaromatic compounds mixed with C4-C10 aliphatic and cycloaliphatic products which, under the reaction conditions, undergo ... | 05/01/2012 |
| 8071832 | Method of converting ethylbenzene and process for producing -xylene A process converts ethylbenzene in a C8 aromatic hydrocarbon mixture containing a large amount of non-aromatic hydrocarbons, mainly to benzene, by which the xylene loss is small, the deactivation rate of the catalyst can be reduced, and a high conversion rate to p-x... | 12/06/2011 |
| 7723554 | Process for the selective catalytic hydrodealkylation of alkylaromatic hydrocarbons Process for the catalytic hydrodealkylation alone of hydrocarbon compositions comprising C8-C13 alkylaromatic compounds, optionally in a mixture with C4-C9 aliphatic and cycloaliphatic products, including the treatment in ... | 05/25/2010 |
| 7425660 | Ethylbenzene conversion and xylene isomerization processes and catalysts therefor Catalysts comprising a combination of molecular sieve having a pore diameter of from about 4 to 8 angstroms and a catalytically-effective amount of molybdenum hydrogenation component in an amorphous aluminum phosphate binder provide processes for isomerizing xylene ... | 09/16/2008 |
| 7304195 | Process for increasing production of benzene from hydrocarbon mixture A process for increasing the production of benzene from a hydrocarbon mixture. A process for producing an aromatic hydrocarbon mixture and liquefied petroleum gas (LPG) from a hydrocarbon mixture, and a solvent extraction process for separating and recovering polar ... | 12/04/2007 |
| 7301063 | Process for increasing production of light olefin hydrocarbon from hydrocarbon feedstock A process for increasing the production of light olefin hydrocarbons from a hydrocarbon feedstock. A process for producing an aromatic hydrocarbon mixture and liquefied petroleum gas (LPG) from a hydrocarbon mixture, and a process for producing a hydrocarbon feedsto... | 11/27/2007 |
| 7301064 | Ethylbenzene conversion and xylene isomerization processes and catalysts therefor Catalysts comprising a combination of molecular sieve having a pore diameter of from about 4 to 8 angstroms and a catalytically-effective amount of molybdenum hydrogenation component in an amorphous aluminum phosphate binder provide processes for isomerizing xylene ... | 11/27/2007 |
| 7297831 | Process of preparing aromatic hydrocarbons and liquefied petroleum gas from hydrocarbon mixture Disclosed is a process of preparing aromatic hydrocarbons and liquefied petroleum gas (LPG) from a hydrocarbon mixture, in which a non-aromatic compound in the hydrocarbon feedstock mixture is converted into a gaseous material having a large amount of LPG through hy... | 11/20/2007 |
| 7282617 | Process of making a highly stable aromatic alkylate suitable for use in making improved additives and surfactants A process for making medium and long chain alkylaromatics and alkylphenols having a high level of anti-Markovnikov addition of the alkyl group. The alkylaromatics and alkylphenols made by the process of the present invention have enhanced stability and are particula... | 10/16/2007 |
| 7273828 | 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-b... | 09/25/2007 |
| 7249469 | Method for separating a multicomponent stream This invention relates to a method for separating a stream having benzene, toluene and alkyl benzene, said method comprising: feeding the stream into a first distillation column, wherein the stream comprises between about 60 mole percent to about 85 mole percent tol... | 07/31/2007 |
| 7220885 | 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-b... | 05/22/2007 |
| 7208136 | Alcohol steam reforming catalysts and methods of alcohol steam reforming The present invention provides steam reforming catalyst compositions containing Pd and Zn, and methods of steam reforming alcohols over a catalyst. Surprisingly superior results and properties of the present invention, including low temperature activity and/or low c... | 04/24/2007 |
| 7199070 | Conversion catalyst for ethylbenzene containing xylenes and process for converting ethylbenzene containing xylenes by using catalyst A catalyst in which X-ray diffraction intensity ratio of the crystal lattice plane spacing d-value of 0.196±0.002 nm to the crystal lattice plane spacing d-value of 0.386±0.008 nm is in a range from 7:100 to 35:100 and a process for making the catalyst to contact ... | 04/03/2007 |
| 7157397 | Process for the production of mesitylene A process is described for the synthesis of mesitylene, characterized in that mesitylene is obtained starting exclusively from pseudocumene, without the use of any other chemical compound, operating in continuous, at a temperature ranging from 225 to 400° C., at a ... | 01/02/2007 |
| 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 |
| RE39222 | Process for preparing 2,6-dialkylnaphthalene A process for producing 2,6-dialkylnaphthalene from a hydrocarbon feedstock that contains at least one component selected from the group consisting of dialkylnaphthalene isomers, monoalkylnaphthalene isomers, polyalkylnaphthalenes, and naphthalene, is provided that ... | 08/01/2006 |
| 7081556 | Aromatics conversion with ITQ-13 There is provided a process for aromatics conversion by contacting a feed suitable for aromatics conversion under conversion condition and in the presence of a catalyst comprising ITQ-13. Examples of such conversion processes include isomerization of aromatic (xylen... | 07/25/2006 |
| 7041866 | Solid-acid 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 co... | 05/09/2006 |
| 6977322 | Isomerization catalyst and processes 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 tungstated oxide or hydroxide of a Group IVB (IUPAC 4) metal, a first component ... | 12/20/2005 |
| 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 |
| 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 |
| 6635792 | Process for producing aromatic hydrocarbon compounds and liquefied petroleum gas from hydrocarbon feedstock Disclosed are a process for producing aromatic hydrocarbon compounds and liquefied petroleum gas (LPG) from a hydrocarbon feedstock having boiling points of 30-250° C. and a catalyst useful therefor. In the presence of said catalyst, aromatic components ... | 10/21/2003 |
| 6627780 | 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 ... | 09/30/2003 |
| 6605566 | Supported bimetallic catalyst with a strong interaction between a group VIII metal and tin, and its use in a catalytic reforming process A novel supported bimetallic catalyst comprises a group VIII metal such as platinum, and tin, at least a portion of which interacts strongly with the group VIII metal in the catalyst in the reduced state. In the partially oxidized state, the catalyst of t... | 08/12/2003 |
| 6593503 | Process for making aromatic hydrocarbons using an acid treated zeolite A catalyst composition and a process for converting a hydrocarbon stream such as, for example, gasoline to C6 to C8 aromatic hydrocarbons such as toluene and xylenes are disclosed. The catalyst composition includes an alumina, a sili... | 07/15/2003 |
| 6504076 | Method of conversion of heavy aromatics A method is provided for conversion of heavy alkylaromatic compounds, particularly those in the C8 -C12 range, into more valuable aromatics of benzene, toluene and xylene utilizing a toluene disproportionation unit containing a nicke... | 01/07/2003 |
| 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 |
| 6133494 | Catalyst composition comprising acid-base leached zeolites A catalyst composition and a process for hydrodealkylating C9 + aromatic compounds such as, for example, trimethylbenzenes, to C6 to C8 aromatic hydrocarbons such as toluene and xylenes are disclosed. The composition compr... | 10/17/2000 |
| 6121501 | Process for preparing 2,6-dialkylnaphthalene A process for producing 2,6-dialkylnaphthalene from a hydrocarbon feedstock that contains at least one component selected from the group consisting of dialkylnaphthalene isomers, monoalkylnaphthalene isomers, polyalkylnaphthalenes, and naphthalene, is pro... | 09/19/2000 |
| 6077984 | Process for making zeolite containing zinc borate composition, the composition and the use thereof in hydrocarbon conversion A novel zeolite catalyst composition comprising a mixture of a zeolite, a binder, and a zinc borate compound wherein such mixture is calcined or treated with steam. Preferably, the zeolite has not been treated with an acid. Also provided is a process of m... | 06/20/2000 |
| 6063975 | Hydrocarbon conversion catalyst composition and processes therefor and therewith A catalyst composition, a process for producing the composition, and a hydrotreating process for converting a hydrocarbon stream such as, for example, gasoline, to olefins and C6 to C8 aromatic hydrocarbons such as toluene and xylene... | 05/16/2000 |
| 6063974 | Silylated water vapor treated zinc or gallium promoted zeolite and use thereof for the conversion of non-aromatic hydrocarbons to olefins and aromatic hydrocarbons A hydrocarbon conversion process in which the rate of coke formation is reduced without a significant sacrifice in light olefin and BTX yield by the use of a silylated, stabilized metal promoted zeolite catalyst. Another embodiment includes a novel silyla... | 05/16/2000 |
| 6051744 | Low pressure hydrodealkylation of ethylbenzene and xylene isomerization A new process for the hydrodealkylation of ethylbenzene and the isomerization of xylenes at low pressure and at a low hydrogen to ethylbenzene mole ratio as well as a low hydrogen to hydrocarbon feed mole ratio using a catalyst comprising (a) HZSM-5 havin... | 04/18/2000 |
| 5998688 | Xylene isomerization process using toluene co-feed A method for minimizing the loss of xylenes in an ethylbenzene conversion/isomerization process by adding toluene to the feedstock. The concentration of toluene in the feedstock is increased by co-feeding toluene or by recycling toluene separated from the... | 12/07/1999 |
| 5965782 | Zeolite catalyst composition and processes therefor and therewith A catalyst composition, a process for producing the composition and a process for transalkylation of C9 + aromatic compounds to C6 to C8 aromatic hydrocarbons are disclosed. The composition comprises a zeolite and tungsten... | 10/12/1999 |
| 5952535 | Selective catalytic conversion of a C9 aromatic feedstock containing substantial amounts of ethyl substituted aromatic components to a product rich in toluene and/or xylenes This invention is an improved process for the conversion of a C9 mixed alkyl aromatic feedstream containing ethyl substituted aromatics to a product rich in toluenes and/or xylenes via catalytic transalkylation/disproportionation using a pallad... | 09/14/1999 |
| 5929295 | Hydrodealkylation and transalkylation of C9 + aromatic compounds A catalyst composition, a process for producing the composition and a hydrocarbon conversion process for converting a C9 + aromatic compound to a C6 to C8 aromatic hydrocarbon such as a xylene are disclosed. The compositio... | 07/27/1999 |
| 5907074 | 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 ... | 05/25/1999 |
