Using Crystalline Aluminosilicate Catalyst Patents (Class 585/475)
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Patent number: 8030238Abstract: The present invention relates to a new zeolite having a beta-type crystalline structure, characterized by a distribution of the Lewis acid sites and Brønsted acid sites corresponding to a molar ratio [Lewis sites] [Brønsted sites] equal to or higher than 1.5. This new zeolite is useful in preparation processes of alkylated aromatic hydrocarbons through the alkylation and/or transalkylation of aromatic compounds. The preparation method of the new zeolite is also object of the present invention.Type: GrantFiled: June 21, 2005Date of Patent: October 4, 2011Assignees: Polimeri Europa S.p.A., Eni S.p.A.Inventors: Guido Spano′, Stefano Ramello, Gianni Girotti, Franco Rivetti, Angela Carati
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Patent number: 8022262Abstract: 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)ExSiyOz where M represents a combination of potassium and sodium exchangeable cations, R is a singly charged organoammonium cation such as the dimethyldipropylammonium cation and E is a framework element such as gallium. These compositions comprise a MSE zeolite, a MFI zeolite and an ERI zeolite. The compositions are similar to MCM-68 but are characterized by unique x-ray diffraction patterns and have catalytic properties for carrying out various hydrocarbon conversion processes.Type: GrantFiled: June 21, 2010Date of Patent: September 20, 2011Assignee: UOP LLCInventors: Jaime G. Moscoso, Deng-Yang Jan
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Patent number: 8022261Abstract: A catalyst composition comprises a crystalline MCM-22 family molecular sieve and a binder, wherein the catalyst composition is characterized by an extra-molecular sieve porosity greater than or equal to 0.122 ml/g for pores having a pore diameter ranging from about 2 nm to about 8 nm, wherein the porosity is measured by N2 porosimetry. The catalyst composition may be used for the process of alkylation or transalkylation of an alkylatable aromatic compound with an alkylating agent. The molecular sieve may have a Constraint Index of less than 12, e.g., less than 2. Examples of molecular sieve useful for this disclosure are a MCM-22 family molecular sieve, zeolite Y, and zeolite Beta.Type: GrantFiled: October 18, 2010Date of Patent: September 20, 2011Assignee: ExxonMobil Chemical Patents Inc.Inventors: Mohan Kalyanaraman, Christine N. Elia, Darryl D. Lacy, Jean W. Beeckman, Michael C. Clark
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Patent number: 7982084Abstract: A new family of crystalline aluminosilicate zeolites has been synthesized. These zeolites are represented by the empirical formula. Mmn+Rr+Al(1-x)ExSiyOz where M represents a combination of potassium and sodium exchangeable cations, R is a singly charged organoammonium cation such as the propyltrimethylammonium cation and E is a framework element such as gallium. These zeolites are similar to MWW but are characterized by unique x-ray diffraction patterns and compositions and have catalytic properties for carrying out various hydrocarbon conversion processes.Type: GrantFiled: March 31, 2010Date of Patent: July 19, 2011Assignee: UOP LLCInventors: Jaime G. Moscoso, Deng-Yang Jan
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Patent number: 7951986Abstract: 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 catalyst having a phosphorus content in the range of 0.01 wt. % to 0.5 wt. % of said catalyst, to provide a product which comprises ethylbenzene.Type: GrantFiled: July 29, 2010Date of Patent: May 31, 2011Assignee: ExxonMobil Chemical Patents Inc.Inventors: Michael C. Clark, Jane C. Cheng, Ajit B. Dandekar
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Patent number: 7939704Abstract: 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.Type: GrantFiled: April 1, 2010Date of Patent: May 10, 2011Assignees: ExxonMobil Chemical Patents Inc., Stone & Webster, Inc.Inventors: Michael C. Clark, Vijay Nanda, Carlos N. Lopez, Brian Maerz, Maruti Bhandarkar
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Patent number: 7923589Abstract: A process for producing an alkylated aromatic product in a reactor by reacting an alkylatable aromatic compound feedstock with another feedstock comprising alkene component and alkane component in a reaction zone containing an alkylation catalyst. The reaction zone is operated in predominantly liquid phase without inter-zone alkane removal. The polyalkylated aromatic compounds can be separated as feed stream for transalkylation reaction in a transalkylation reaction zone.Type: GrantFiled: March 1, 2006Date of Patent: April 12, 2011Assignees: ExxonMobil Chemical Patents Inc., Stone & Webster, Inc.Inventors: Michael C. Clark, Brian Maerz
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Patent number: 7923590Abstract: 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 transalkylation reactor zone. This process requires significantly less total aromatics distillation and recycle as compared to the prior art.Type: GrantFiled: June 27, 2008Date of Patent: April 12, 2011Assignees: ExxonMobil Chemical Patents Inc, Stone & Webster, Inc.Inventors: Shiou-Shan Chen, Shyh-Yuan H. Hwang
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Patent number: 7897825Abstract: 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 range of 3-12 and 0.01 to 5 wt. % of at least one source of a first metal element of Groups 6-10; and (b) a second catalyst comprising a second molecular sieve having a Constraint Index less than 3 and 0 to 5 wt. % of at least one source of a second metal element of Groups 6-10, wherein the weight ratio of the first catalyst over the second catalyst is in the range of 5:95 to 75:25 and wherein the first catalyst is located in front of the second catalyst when they are brought into contacting with the C9+aromatic feedstock and the C6-C7 aromatic feedstock in the present of hydrogen.Type: GrantFiled: December 17, 2009Date of Patent: March 1, 2011Assignee: ExxonMobil Chemical Patents Inc.Inventor: Doron Levin
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Publication number: 20110044891Abstract: A process for manufacturing a synthetic porous crystalline molecular sieve requires an aqueous reaction mixture comprising a source of X2O3 (X is a trivalent element), a source of YO2 (Y is a tetravalent element) and a source of MOH (M is an alkali metal). The H2O/MOH molar ratio is within the range of 70 to 126 and the source of X2O3 and YO2 is an amorphous material containing both X2O3 and YO2 and having YO2/X2O3 molar ratio of 15 or less. The molecular sieve products are useful as catalysts and/or absorbents. Such molecular sieves having MFI structure type, TON structure type or the structure type of zeolite beta and a composition involving the molar relationship (n) YO2:X2O3 wherein n is from 2 to less than 15 are novel compositions of matter.Type: ApplicationFiled: January 19, 2009Publication date: February 24, 2011Inventors: Wieslaw Jerzy Roth, Mae Koenig Rubin
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Publication number: 20110009680Abstract: This disclosure relates to a crystalline molecular sieve comprising silicalite-1 having substantially hexagonal column morphology of at least 90% and having less than 20% crystal twinning as measured by SEM. This disclosure also relates to a method of making the crystalline molecular sieve of this disclosure, the method comprises: (a) providing a mixture comprising at least one source of at least one tetravalent element (Y), at least one source of hydroxide ion, at least one directing-agent (R), water, the mixture having the following molar composition: H2O/Y=10 to 1000 OH?/Y=0.41 to 0.74 R/Y=0.001 to 2 wherein R comprises at least one of TPAOH, TPACl, TPABr, TPAI, and TPAF, wherein OH?/Y is not corrected for trivalent ion; (b) submitting the mixture at crystallization conditions to form a product comprising the crystalline molecular sieve, wherein the crystallization conditions comprise a temperature in the range of from 100° C. to 250° C.Type: ApplicationFiled: February 13, 2009Publication date: January 13, 2011Inventor: Sebastien Kremer
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Patent number: 7868215Abstract: 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 catalyst have a surface to volume ratio of about 80 to less than 200 inch?1.Type: GrantFiled: November 10, 2009Date of Patent: January 11, 2011Assignee: ExxonMobil Chemical Patents Inc.Inventors: Ajit B. Dandekar, Michael Hryniszak, David Lawrence Stern
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Patent number: 7847137Abstract: 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.Type: GrantFiled: July 30, 2007Date of Patent: December 7, 2010Assignee: UOP LLCInventors: Antoine Negiz, Edwin P. Boldingh, James E. Rekoske, Eric J. Baker
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Patent number: 7842277Abstract: This disclosure relates to a crystalline MCM-22 family molecular sieve composition having, in its as-synthesized form, an X-ray diffraction pattern including a peak at d-spacing maximum of 12.33±0.23 Angstroms, a distinguishable peak at a d-spacing maximum between 12.57 to about 14.17 Angstroms and a non-discrete peak at a d-spacing maximum between 8.8 to 11. Angstroms, wherein the peak intensity of the d-spacing maximum between 12.57 to about 14.17 Angstroms is less than 90% of the peak intensity of the d-spacing maximum at 12.33±0.23 Angstroms. This disclosure also relates to methods of making the crystalline MCM-22 family molecular sieve composition.Type: GrantFiled: July 13, 2007Date of Patent: November 30, 2010Assignee: ExxonMobil Chemical Patents Inc.Inventors: Wieslaw J. Roth, Machteld M. Mertens, Els C. De Clerck, Ivy D. Johnson
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Patent number: 7812204Abstract: The invention relates to a multi-step chemical transformation process for the production of 2,6-dimethylnaphthalene starting from one or more naphthalene hydrocarbons or hydrocarbon blends containing the same, one or more benzene hydrocarbons and, optionally, a methylating agent reacted in the presence of a catalyst containing a zeolite belonging to the MTW structural group, where hydrogen is fed in at least one of the steps.Type: GrantFiled: November 30, 2005Date of Patent: October 12, 2010Assignee: Polimeri Europa S.p.A.Inventors: Gianni Girotti, Franco Rivetti, Renzo Bignazzi
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Patent number: 7803977Abstract: 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.Type: GrantFiled: March 16, 2007Date of Patent: September 28, 2010Assignee: UOP LLCInventors: Mark G. Riley, Deng-Yang Jan
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Patent number: 7799961Abstract: 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.Type: GrantFiled: February 24, 2006Date of Patent: September 21, 2010Assignees: ExxonMobil Chemical Patents Inc., Stone & Webster, Inc.Inventors: Michael C. Clark, Vijay Nanda, Carlos N. Lopez, Brian Maerz, Chung-Ming Chi
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Patent number: 7795487Abstract: 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 phase conditions in the presence of a zeolite beta catalyst having a phosphorus content in the range of 0.001 wt. % to 10.0 wt. % of said catalyst, to provide a product which comprises a monoalkylated aromatic compound.Type: GrantFiled: February 27, 2006Date of Patent: September 14, 2010Assignee: ExxonMobil Chemical Patents Inc.Inventors: Michael C. Clark, Jane C. Cheng, Ajit B. Dandekar
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Publication number: 20100191028Abstract: 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.Type: ApplicationFiled: April 1, 2010Publication date: July 29, 2010Inventors: Michael C. Clark, Vijay Nanda, Carlos N. Lopez, Brian Maerz, Maruti Bhandarkar
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Publication number: 20100185035Abstract: 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.Type: ApplicationFiled: March 29, 2010Publication date: July 22, 2010Applicant: Fin Technology Inc.Inventors: James Butler, Olga Khabashesku, Darek Wachowicz, Callum Bailey
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Patent number: 7745674Abstract: A process for alkylation of benzene, including: feeding benzene, a polyalkylate, and a catalyst to a reactor comprising a first and a second reaction zone; reacting the benzene and the polyalkylate in the first reaction zone under transalkylation conditions to form a monoalkylate product; feeding a C2-C4 olefin to the reactor intermediate the first and second reaction zones; reacting benzene and the C2-C4 olefin in the second reaction zone under alkylation conditions to form additional monoalkylate product; recovering an effluent from the reactor, wherein the effluent comprises benzene, the monoalkylate product, any unreacted C2-C4 olefins, heavy hydrocarbons, and the catalyst; separating the catalyst from the effluent; separating the benzene from the monoalkylate product and the heavy hydrocarbons within the liquid effluent; separating the monoalkylate product from the heavy hydrocarbons within the liquid effluent; and recovering the monoalkylate product.Type: GrantFiled: August 20, 2008Date of Patent: June 29, 2010Assignee: Catalytic Distillation TechnologiesInventors: Christopher C. Boyer, Lawrence A. Smith, Jr.
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Patent number: 7727490Abstract: One exemplary embodiment can include an aromatic production apparatus. The aromatic production apparatus can include a first fractionation zone, a second fractionation zone, and a third fractionation zone. Generally, the first fractionation zone can provide a stream rich in an aromatic C8? and a stream rich in an aromatic C9, the second fractionation zone can separate at least one of benzene and optionally toluene from a transalkylation zone effluent and provide a feed to the first fractionation zone, and the third fractionation zone can receive the stream rich in the aromatic C8? from the first fractionation zone. An effluent from the third fractionation zone can be directly comprised in a para-xylene-separation zone feed to a para-xylene-separation zone.Type: GrantFiled: August 17, 2007Date of Patent: June 1, 2010Assignee: UOP LLCInventor: Lubo Zhou
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Patent number: 7718836Abstract: The present invention relates to an integrated process for the production of high purity 2,6-dimethylnaphthalene starting from hydrocarbon mixtures containing naphthalene and/or isomers of methylnaphthalene and/or isomers of dimethylnaphthalene and/or isomers of polymethylnaphthalene, and from an alkylating agent, preferably methanol, reacted in the presence of a methylated benzene solvent or mixture of various methylated benzene solvents, preferably selected from toluene, xylene and trimethylbenzene, and a catalyst consisting of ZSM-12 zeolite and an inorganic ligand.Type: GrantFiled: June 6, 2002Date of Patent: May 18, 2010Assignees: ENI S.p.A., Polimeri Europa S.p.A.Inventors: Gianni Girotti, Giuseppe Terzoni, Oscar Cappellazzo, Renzo Bignazzi, Giannino Pazzuconi
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Patent number: 7709692Abstract: The present invention relates to a process for the selective production of para-diethyl benzene from a mixed aromatic feedstock containing ethyl benzene and at least one other aromatic compound selected from benzene, alkylated benzene having alkyl group with carbon number 1 to 6, mono-alkyl aromatics, dialkyl aromatics, trialkyl aromatics, tetraalkyl aromatics, pentaalkyl aromatics, hexaalkyl aromatics, containing side chains having 1 to 6 carbon atoms, and any mixtures thereof, the process comprising of (a) alkylating the feedstock under alkylating conditions, over a selectivated metallosilicate composite catalyst; and (b) recovering a product stream containing at least 95 wt % para-diethyl benzene, the product stream being substantially free from other isomers of diethylbenzene, C8 aromatics, C9 aromatics, C10+ heavy aromatics other than diethyl benzene isomers, sulphur, halogen, olefinic compound and carbonyl compounds.Type: GrantFiled: January 17, 2006Date of Patent: May 4, 2010Assignee: Indian Petrochemicals Corporation LimitedInventors: Jagannath Das, Pavagada Raghavendra Char, Arun Gurudath Basrur, Anand Bhimarao Halgeri, Sanjay Ramakrishna Rinke, Laxmilal Jain, Avinash Ramchandra Saple, Mantri Ganapati
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Patent number: 7692055Abstract: 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 benzene. Thus, high benzene to dialkylbenzene molar ratios can be economically maintained in order to enhance catalyst stability.Type: GrantFiled: February 12, 2007Date of Patent: April 6, 2010Assignee: UOP LLCInventors: Stephen W. Sohn, Mark G. Riley
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Patent number: 7686946Abstract: One exemplary embodiment can include a method of altering a feed to a transalkylation zone by changing a destination of a stream rich in an aromatic C9 for increasing production of at least one of benzene, toluene, para-xylene, and an aromatic gasoline blend. The method can include providing the stream rich in an aromatic C9 from a first fractionation zone that receives an effluent from a second fractionation zone. The second fractionation zone may produce a stream rich in at least one of benzene and toluene. The stream rich in the aromatic C9 can be at least partially comprised in at least one of the feed to the transalkylation zone and the aromatic gasoline blend.Type: GrantFiled: August 17, 2007Date of Patent: March 30, 2010Assignee: UOP LLCInventor: Lubo Zhou
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Publication number: 20100041933Abstract: 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.Type: ApplicationFiled: August 18, 2008Publication date: February 18, 2010Applicant: Fina Technology, Inc.Inventors: James R. Butler, Xin Xiao, Rosa Hall, Sivadinarayana Chinta
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Publication number: 20100041934Abstract: 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.Type: ApplicationFiled: August 18, 2008Publication date: February 18, 2010Applicant: Fina Technology, Inc.Inventors: James R. Butler, Rosa Hall, Xin Xiao
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Patent number: 7663010Abstract: 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 range of 3-12 and 0.01 to 5 wt. % of at least one source of a first metal element of Groups 6-10; and (b) a second catalyst comprising a second molecular sieve having a Constraint Index less than 3 and 0 to 5 wt. % of at least one source of a second metal element of Groups 6-10, wherein the weight ratio of the first catalyst over the second catalyst is in the range of 5:95 to 75:25 and wherein the first catalyst is located in front of the second catalyst when they are brought into contacting with the C9+ aromatic feedstock and the C6-C7 aromatic feedstock in the present of hydrogen.Type: GrantFiled: October 10, 2008Date of Patent: February 16, 2010Assignee: ExxonMobil Chemical Patents Inc.Inventor: Doron Levin
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Publication number: 20100022813Abstract: A method of reducing the ethylbenzene content in a stream containing xylene is disclosed. The method includes the reaction of ethylbenzene, such as a disproportionation or transalkylation reaction, to produce benzene and other hydrocarbon compound and can include the separation of at least a portion of the resulting benzene and other hydrocarbon compounds to produce a xylene stream having reduced ethylbenzene content.Type: ApplicationFiled: July 28, 2008Publication date: January 28, 2010Applicant: Fina Technology, Inc.Inventors: James R. Butler, Joseph E. Pelati, Darek Wachowicz, Taylor Rives, Xin Xiao
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Patent number: 7638668Abstract: 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 catalyst have a surface to volume ratio of about 80 to less than 200 inch?1.Type: GrantFiled: October 22, 2007Date of Patent: December 29, 2009Assignee: ExxonMobil Chemical Patents Inc.Inventors: Ajit B. Dandekar, Michael Hryniszak, David Lawrence Stern
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Patent number: 7638669Abstract: 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 processes of this invention include a transalkylation section and a disproportionation section in the benzene and toluene-containing feed is directly provided to the transalkylation section and in which a benzene recycle loop in the transalkylation section isolates the disproportionation section from C6 naphthenes.Type: GrantFiled: June 25, 2008Date of Patent: December 29, 2009Assignee: UOP LLCInventors: Edward M. Casey, Patrick J. Silady, Antoine Negiz, Gregory R. Werba
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Patent number: 7629499Abstract: 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 contact with at least a first zeolitic catalyst, b) the introduction of at least a portion of the effluent that is obtained from stage a) and a feedstock that contains benzene and/or toluene at the inlet of a second reaction zone that contains at least a second zeolitic catalyst, and c) the separation of at least a portion of the effluent that is obtained from stage b) is described.Type: GrantFiled: November 9, 2005Date of Patent: December 8, 2009Assignee: Institut Francais du PetroleInventors: José Manuel Serra Alfaro, Avelino Corma, Emmanuelle Guillon
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Patent number: 7626064Abstract: 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 crystallites having a MOR framework type with a mean crystallite length parallel to the direction of the 12-ring channels of about 60 nm or less and a mesopore volume of at least about 0.10 cc/gram. The UZM-14 catalyst is particularly active and stable in a transalkylation process.Type: GrantFiled: June 26, 2008Date of Patent: December 1, 2009Assignee: UOP LLCInventors: Edwin P. Boldingh, Michael G. Gatter, Susan C. Koster, David S. Lafyatis, Terrence E. Deak, Eric J. Baker, Robert W. Broach, Deng-Yang Jan, Jaime G. Moscoso
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Patent number: 7622032Abstract: The present invention relates to new crystalline molecular sieve SSZ-74 prepared using an hexamethylene-1,6-bis-(N-methyl-N-pyrrolidinium) dication as a structure-directing agent, and processes employing SSZ-74 in a catalyst.Type: GrantFiled: December 21, 2006Date of Patent: November 24, 2009Assignee: Chevron U.S.A. Inc.Inventors: Stacey I. Zones, Allen W. Burton, Jr.
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Patent number: 7605295Abstract: 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.Type: GrantFiled: June 26, 2008Date of Patent: October 20, 2009Assignee: UOP LLCInventors: David S. Lafyatis, Edwin P. Boldingh, Antoine Negiz, Edward M. Casey
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Patent number: 7601311Abstract: 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 processes of this invention include a transalkylation section and a disproportionation section in the benzene and toluene-containing feed is directly provided to the transalkylation section and in which a benzene recycle loop in the transalkylation section isolates the disproportionation section from C6 naphthenes.Type: GrantFiled: June 25, 2008Date of Patent: October 13, 2009Assignee: UOP LLCInventors: Edward M. Casey, Patrick J. Silady, Antoine Negiz, Gregory R. Werba
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Patent number: 7576249Abstract: 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 catalyst is contacted with a sulfur-containing compound such as hydrogen sulfide or dimethyldisulfide (DMDS) under pretreatment conditions involving a temperature of at least 100° C. The sulfur-containing compound is employed in a relatively small amount to passivate only a minor portion of the active nickel sites. A toluene-containing feedstock is brought into contact with the pretreated catalyst under conditions effective for the disproportionation of toluene and a disproportionation product is removed from contact with the catalyst. The mordenite catalyst contains nickel in an amount within the range of 0.1-2 wt. %. The catalyst may contain another metal such as palladium or platinum, or a lanthanide series metal such as lanthanum or cerium.Type: GrantFiled: January 6, 2005Date of Patent: August 18, 2009Assignee: Fina Technology, Inc.Inventors: Xin Xiao, Becky Fussell, James Butler, Brandi Gomez
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Patent number: 7572945Abstract: 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.Type: GrantFiled: June 19, 2007Date of Patent: August 11, 2009Assignee: Fina Technology, Inc.Inventors: James R. Butler, Xin Xiao, Rosa Hall
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Patent number: 7566810Abstract: 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 content of benzene co-boilers. The invention encompasses the use of sulfided catalyst embodiments in xylene production processes.Type: GrantFiled: August 23, 2007Date of Patent: July 28, 2009Assignee: UOP LLCInventors: Edwin P. Boldingh, Antoine Negiz, James E. Rekoske, Eric J. Baker, Robert B. Larson, Terrence E. Deak, Sergey V. Gurevich
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Patent number: 7563358Abstract: A hydrocarbon conversion process for producing an aromatics product containing of benzene, toluene, xylenes, or mixtures thereof. The process is carried out by converting precursors of benzene, toluene, and xylenes that are contained in a hydrocarbon feed (C6+ non-aromatic cyclic hydrocarbons, A8+ single-ring aromatic hydrocarbons having at least one alkyl group containing two or more carbon atoms; and A9+ single-ring aromatic hydrocarbons having at least three methyl groups) to produce a product that contains an increased amount of benzene, toluene, xylenes, or combinations thereof compared to said hydrocarbon feed.Type: GrantFiled: August 24, 2006Date of Patent: July 21, 2009Assignee: ExxonMobil Chemical Patents Inc.Inventors: Elizabeth L. Stavens, Stephen H. Brown, J. Scott Buchanan, Yun-Feng Chang, Larry L. Iaccino, Paul F. Keusenkothen, John D. Y. Ou, Randall D. Partridge
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Patent number: 7550073Abstract: The present invention relates to new crystalline molecular sieve SSZ-70 prepared using a N,N?-diisopropyl imidazolium cation as a structure-directing agent, methods for synthesizing SSZ-70 and processes employing SSZ-70 in a catalyst.Type: GrantFiled: November 2, 2005Date of Patent: June 23, 2009Assignee: Chevron U.S.A., Inc.Inventors: Stacey I. Zones, Allen W. Burton, Jr.
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Patent number: 7544848Abstract: 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 processes of this invention include a transalkylation section and a disproportionation section in the benzene and toluene-containing feed is directly provided to the transalkylation section and in which a benzene recycle loop in the transalkylation section isolates the disproportionation section from C6 naphthenes.Type: GrantFiled: June 25, 2008Date of Patent: June 9, 2009Assignee: UOP LLCInventors: Edward M. Casey, Patrick J. Silady, Antoine Negiz, Gregory R. Werba
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Patent number: 7544849Abstract: 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 A9+ are reacted with toluene to produce xylenes. Reduced methane production relative to total light ends gas production results in lower hydrogen consumption and lower reactor exotherms.Type: GrantFiled: May 22, 2008Date of Patent: June 9, 2009Assignee: UOP LLCInventors: Edwin P. Boldingh, Antoine Negiz, Gregory F. Maher, Paula L. Bogdan, Dean E. Rende
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Patent number: 7537685Abstract: The present invention relates to new molecular sieve SSZ-71 prepared using a N-benzyl-1,4-diazabicyclo[2.2.2]octane cation as a structure-directing agent, methods for synthesizing SSZ-71 and processes employing SSZ-71 in a catalyst.Type: GrantFiled: November 2, 2005Date of Patent: May 26, 2009Assignee: Chevron U.S.A. Inc.Inventors: Cong-Yan Chen, Allen W. Burton, Jr., Ann J. Liang
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Publication number: 20090112034Abstract: 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 range of 3-12 and 0.01 to 5 wt. % of at least one source of a first metal element of Groups 6-10; and (b) a second catalyst comprising a second molecular sieve having a Constraint Index less than 3 and 0 to 5 wt. % of at least one source of a second metal element of Groups 6-10, wherein the weight ratio of the first catalyst over the second catalyst is in the range of 5:95 to 75:25 and wherein the first catalyst is located in front of the second catalyst when they are brought into contacting with the C9+ aromatic feedstock and the C6-C7 aromatic feedstock in the present of hydrogen.Type: ApplicationFiled: October 10, 2008Publication date: April 30, 2009Inventor: Doron Levin
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Patent number: 7510644Abstract: A method for making a zeolite includes providing a reaction mixture containing mixed inorganic oxides and an organic templating agent, heating the reaction mixture, removing the templating agent at a temperature of no greater than 550° C. and under conditions such that the resulting zeolite is has an AAI of at least 1.2. The zeolite is preferably zeolite beta, TEA-mordenite or TEA-ZSM-12.Type: GrantFiled: December 28, 2004Date of Patent: March 31, 2009Assignee: Lummus Technology Inc.Inventors: Rudolf Overbeek, Nelleke van der Puil, Chuen Y. Yeh, Lawrence L. Murrell, Yun-Feng Chang, Philip Jay Angevine, Johannes Hendrik Koegler
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Patent number: 7488861Abstract: Cumene and secondary butyl benzene are produced simultaneously in a distillation column reactor by feeding propylene, butylene and benzene to the reactor. Unreacted benzene is removed as overheads and cumene and secondary butyl benzene are removed as products. The catalysts used are acid cation exchange resins, zeolites, particularly beta zeolite.Type: GrantFiled: March 17, 2005Date of Patent: February 10, 2009Assignee: Catalytic Distillation TechnologiesInventors: Christopher C. Boyer, Mitchell E. Loescher
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Patent number: 7485763Abstract: 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 sieve selected from the group consisting of ZSM-12, mordenite and a porous crystalline inorganic oxide material having an X-ray diffraction pattern including d-spacing maxima at 12.4±0.25, 6.9±0.15, 3.57±0.07 and 3.42±0.07; and (ii) a second molecular sieve having a constraint index ranging from 3 to 12. At least the first molecular sieve has a hydrogenation component associated therewith and the first and second molecular sieves are contained in the same catalyst bed. The C9+ aromatic hydrocarbons are converted under the transalkylation reaction conditions to a reaction product containing xylene.Type: GrantFiled: November 3, 2006Date of Patent: February 3, 2009Assignee: ExxonMobil Chemical Patents Inc.Inventors: John Scott Buchanan, Ronald J. Cimini, Robert A. Crane, Wenyih F. Lai, Jose G. Santiesteban, David A. Stachelczyk, David L. Stern, Hye-Kyung C. Timken, William A. Weber
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Patent number: RE41136Abstract: The present invention relates to a process of preparing dialkylnaphthylenes and polyalkylenenaphthyleneates dialkylnaphthalenes and polyalkylenenaphthalates.Type: GrantFiled: January 24, 2002Date of Patent: February 16, 2010Assignees: Kobe Steel, Ltd, ExxonMobil Chemical Patents, Inc.Inventors: Masahiro Motoyuki, Koji Yamamoto, Ajit Vishwanath Sapre, John Paul McWilliams, Susan Patricia Donnelly