Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 8163966 | Aromatics processing catalyst system This disclosure relates to a catalyst system adapted for processing aromatic feedstreams comprising C9+ aromatic feedstock to produce at least one xylene. ... | 04/24/2012 |
| 8148592 | 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 ben... | 04/03/2012 |
| 8063259 | 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. ... | 11/22/2011 |
| 8053618 | UZM-35 zeolitic composition, method of preparation and processes A new family of crystalline aluminosilicate zeolitic compositions, UZM-35 compositions, has been synthesized. These zeolitic compositions are represented by the empirical formula. Mmn+Rr+Al1-xEx | 11/08/2011 |
| 8044253 | 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 p... | 10/25/2011 |
| 8022262 | UZM-35 zeolitic composition method of preparation and processes A new family of crystalline aluminosilicate zeolitic compositions, UZM-35 compositions, has been synthesized. These zeolitic compositions are represented by the empirical formula. Mmn+Rr+Al(1-x)Ex... | 09/20/2011 |
| 7951986 | Process and catalyst for the transalkylation of aromatics Disclosed herein is a process and catalyst for producing an ethylbenzene feed from a polyethylbenzene feed, comprising the step of contacting a benzene feed with a polyethylbenzene feed under at least partial liquid phase conditions in the presence of a zeolite beta... | 05/31/2011 |
| 7803977 | 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 reactio... | 09/28/2010 |
| 7795487 | Process and catalyst for the transalkylation of aromatics Disclosed herein is a process and catalyst for producing a monoalkylated aromatic compound from a polyalkylated aromatic compound, comprising the step of contacting an alkylatable aromatic compound with a polyalkylated aromatic compound under at least partial liquid... | 09/14/2010 |
| 7692055 | Transalkylation of dialkylbenzene Dialkylbenzenes are transalkylated in the presence of benzene and solid catalyst. The transalkylation product is subjected to distillation to provide a lower-boiling, benzene-containing fraction which is fed to a transalkylation reactor as at least a portion of the ... | 04/06/2010 |
| 7663010 | Heavy aromatics processing catalyst and process of using the same This disclosure relates to a catalyst system adapted for transalkylation a C9+ aromatic feedstock with a C6-C7 aromatic feedstock, comprising: (a) a first catalyst comprising a first molecular sieve having a Constraint Index in the r... | 02/16/2010 |
| 7629499 | Process for transalkylation of alkyl-aromatic hydrocarbons used in two reaction zones A process for transalkylation of an alkyl-aromatic hydrocarbon feedstock that has at least 9 carbon atoms per molecule that comprises a) the introduction of said alkyl-aromatic hydrocarbon feedstock at the inlet of a first reaction zone where it is brought into cont... | 12/08/2009 |
| 7626064 | Transalkylation process This invention embodies a catalyst and a process for transalkylation of C7, C9, and C10 aromatics to obtain a high yield of xylenes. The catalyst comprises a novel UZM-14 catalytic material comprising globular aggregates of crystalli... | 12/01/2009 |
| 7605295 | Integrated process yielding xylenes from mixed aromatics The subject invention comprises an aromatics complex to improve yields from a mixed aromatics feed. Through the use of a novel catalyst having higher activity and stability in a transalkylation unit in the complex, a higher xylene yield is obtained. ... | 10/20/2009 |
| 7576249 | Toluene disproportionation process utilizing mild sulfiding during startup A process for the disproportionation of toluene over a nickel-modified mordenite catalyst which has been pretreated with mild sulfiding procedure. The sulfur dose is employed in a minor amount relative to the nickel content of the catalyst. The modified mordenite ca... | 08/18/2009 |
| 7572945 | 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 ... | 08/11/2009 |
| 7566810 | Xylene production processes employing rhenium-containing catalysts Processes for making xylene employ catalysts containing rhenium and a molecular sieve component comprising an acidic MFI molecular sieve having a Si/Al2 molar ratio of less than about 80 and mordenite to provide a transalkylation product with a low conten... | 07/28/2009 |
| 7544849 | 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... | 06/09/2009 |
| 7485763 | Using a catalyst having two different zeolites for transalkylation of a C9+ aromatic feed 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... | 02/03/2009 |
| 7432405 | Production of diisopropylbenzene by disproportion of cumene in the presence of a TEA-mordenite catalyst A process for the disproportionation of cumene is disclosed which comprises the step of contacting a feed containing cumene, under disproportionation conditions, with a catalyst comprising a molecular sieve, preferably TEA-mordenite. The contacting step disproportio... | 10/07/2008 |
| 7423190 | Synergistic rhenium and germanium-containing catalysts potentiated with tin and alkylaromatic transalkylation processes using such catalysts Transalkylation catalysts comprising acidic molecular sieve, rhenium, tin and germanium have good activities and attenuate aromatic ring saturation and lights co-production. ... | 09/09/2008 |
| 7419931 | Catalyst comprising a 10MR zeolite and a 12MR zeolite, and its use in transalkylation of alkylaromatic hydrocarbons A catalyst is described which comprises at least one zeolite with channels with openings defined by a ring having 10 oxygen atoms (10 MI), at least one zeolite with at least channels or side pockets with openings defined by a ring having 12 oxygen atoms (12 MR), at ... | 09/02/2008 |
| 7414163 | Iridium and germanium-containing catalysts and alkylaromatic transalkylation processes using such catalysts Transalkylation catalysts comprising acidic molecular sieve, iridium and germanium have good activities and attenuate aromatic ring saturation and lights co-production where high atomic ratios of germanium to iridium are present. ... | 08/19/2008 |
| 7411102 | Palladium and germanium-containing catalysts and alkylaromatic transalkylation processes using such catalysts Transalkylation catalysts comprising acidic molecular sieve, palladium and germanium have good activities and attenuate aromatic ring saturation and lights co-production provided that sufficient palladium is contained in the catalyst. ... | 08/12/2008 |
| 7411101 | Production of alkylaromatic compounds A process for producing a monoalkylation aromatic product, such as ethylbenzene and cumene, utilizing an alkylation reactor zone and a transalkylation zone in series or a combined alkylation and transkylation reactor zone. ... | 08/12/2008 |
| 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 |
| 7402545 | Catalyst that comprises at least one bog-structured zeolite and its use in transalkylation of alkyl-aromatic hydrocarbons This invention relates to a catalyst that contains at least one BOG-structured zeolite that comprises silicon and at least one Element T that is selected from the group that is formed by aluminum, iron, gallium and boron. The catalyst contains at least one metal tha... | 07/22/2008 |
| 7399894 | Process for producing cumene A process for producing cumene is provided which comprises the step of contacting benzene and propylene under at least partial liquid phase alkylating conditions with a particulate molecular sieve alkylation catalyst, wherein the particles of said alkylation catalys... | 07/15/2008 |
| 7393989 | Shaped catalysts for transalkylation of aromatics for enhanced xylenes production A catalyst, a process for using the catalyst whereby the catalyst effectively transalkylates C7, C9, and C10 aromatics to C8 aromatics are disclosed. The catalyst comprises a support such as mordenite plus a metal componen... | 07/01/2008 |
| 7390395 | Hydrocarbon conversion using molecular sieve SSZ-56 The present invention relates to new crystalline molecular sieve SSZ-56 prepared using a N,N-diethyl-2-methyldecahydroquinolinium cation as a structure directing agent, methods for synthesizing SSZ-56 and processes employing SSZ-56 in a catalyst. ... | 06/24/2008 |
| 7371911 | Critical phase alkylation and transalkylation process in the presence of a beta zeolite A process for the production of ethylbenzene by the ethylation of benzene in the critical phase in a reaction zone containing a molecular sieve aromatic alkylation catalyst comprising cerium-promoted zeolite beta. A polyethylbenzene is supplied into the reaction zon... | 05/13/2008 |
| 7368619 | Process for the production of diesel and aromatic compounds A 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 transalkylated in an integrated transalkylation zone to produce xyl... | 05/06/2008 |
| 7361798 | Production of dialkylbenzenes The invention relates to a process for producing a desired dialkylbenzene isomer having a formula R2C6H4, where R is an alkyl substituent, by contacting a polyalkylbenzene compound of formula RnC6H6-n... | 04/22/2008 |
| 7326389 | Method of producing unsaturated aldehyde and/or unsaturated acid Disclosed is a shell-and-tube reactor that may be used in a method for producing unsaturated aldehydes and/or unsaturated acids from olefins by means of fixed-bed catalytic partial oxidation. The reactor includes at least one reaction zone of a first-step reaction z... | 02/05/2008 |
| 7326818 | Selectivation of molecular sieve catalysts and use therof in hydrocarbon conversion In a process for preparing a selectivated catalyst composition useful in the disproportionation of toluene, a catalyst comprising an acidic molecular sieve is contacted with a boron compound at a temperature in excess of 500° C.; and the resultant catalyst is then ... | 02/05/2008 |
| 7319178 | Molecular sieve compositions, catalysts thereof, their making and use in conversion processes The invention relates to a catalyst composition, a method of making the same and its use in the conversion of a feedstock, preferably an oxygenated feedstock, into one or more olefin(s), preferably ethylene and/or propylene. The catalyst composition comprises a mole... | 01/15/2008 |
| 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 |
| 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 |
| 7304011 | Compositions and processes for reducing NOemissions during fluid catalytic cracking Compositions for reduction of NOx generated during a catalytic cracking process, preferably, a fluid catalytic cracking process, are disclosed. The compositions comprise a fluid catalytic cracking catalyst composition, preferably containing a Y-type zeoli... | 12/04/2007 |
| 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 |
