Aromatic Separated From Other Aromatic Patents (Class 585/828)
  • Patent number: 11059764
    Abstract: Provided is a hybrid process for producing high-purity para-xylene from a feedstock of aromatic hydrocarbon isomer fractions having 8 carbon atoms, in a liquid phase. The process includes a liquid chromatography separation step and a crystallization step of the para-xylene from the purified stream of para-xylene obtained at the separation step.
    Type: Grant
    Filed: September 4, 2018
    Date of Patent: July 13, 2021
    Assignees: IFP Energies Nouvelles, Arkema France
    Inventors: Catherine Laroche, Morgane Josserand, Danielle Richard, Javier Perez-Pellitero, Ludivine Bouvier
  • Patent number: 10913695
    Abstract: The present invention relates to zeolite adsorbents based on agglomerated zeolite X crystals comprising barium, potassium and sodium. These adsorbents find applications in the separation of aromatic C8 isomer fractions and especially xylene.
    Type: Grant
    Filed: July 8, 2016
    Date of Patent: February 9, 2021
    Inventors: Catherine Laroche, Ludivine Bouvier, Javier Perez-Pellitero
  • Patent number: 10358401
    Abstract: Para-xylene is separated from a mixture of C8 aromatics using a simulated moving bed (SMB) adsorption process, wherein a MOF is used as an adsorbent and an alkane or alkene having 7 or less carbon atoms, such as hexane or heptane is used as desorbent. Because of the difference in boiling points of a hexane or heptane desorbent as compared to conventional desorbents such as toluene or para-diethylbenzene, less energy is required to separate hexane or heptane from C8 aromatics by distillation than the energy required to separate toluene or diethylbenzene from C8 aromatics by distillation.
    Type: Grant
    Filed: July 29, 2016
    Date of Patent: July 23, 2019
    Assignees: EXXONMOBIL CHEMICAL PATENTS INC., GEORGIA TECH RESEARCH CORPORATION
    Inventors: Meha Rungta, Jeevan S. Abichandani, Dana L. Pilliod, Robert G. Tinger, Anthony Go, Ke Zhang, Sankar Nair, Jason Gee, David Sholl
  • Patent number: 10351489
    Abstract: Disclosed is a process for recovering paraxylene in which a first simulated moving bed adsorption unit is used to produce two extract streams—one rich in paraxylene and a paraxylene-rich extract stream that is lean in ethylbenzene and an ethylbenzene-rich extract stream that is lean in paraxylene- and a paraxylene-depleted raffinate stream. A significant amount of the ethylbenzene is removed in the ethylbenzene-rich extract stream (at least enough to limit buildup in the isomerization loop), so the paraxylene-depleted raffinate stream may be isomerized in the liquid phase. Avoiding vapor phase isomerization saves energy and capital, as liquid phase isomerization requires less energy and capital than the vapor phase isomerization process due to the requirement of vaporizing the paraxylene-depleted stream and the use of hydrogen, which requires an energy and capital intensive hydrogen recycle loop.
    Type: Grant
    Filed: May 19, 2017
    Date of Patent: July 16, 2019
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Michael Salciccioli, Gaurav Agrawal, Michael W. Weber, Dana L. Pilliod, Catherine M. Dorsi
  • Patent number: 9902666
    Abstract: Processes for the energy efficient recycle of naphthenes in a paraxylene manufacturing process comprise partially condensing a reactor effluent and using a sidedraw tower apparatus. The naphthenes are efficiently separated into the sidedraw stream of the sidedraw tower apparatus. At least a portion of the sidedraw stream is directed to a paraxylene recovery section that produces a paraxylene product and a paraxylene lean stream comprising essentially all of the naphthenes in the sidedraw stream directed to the paraxylene recovery section. The paraxylene lean stream is recycled back to the reactor thereby preventing excessive loss of naphthenes from the processes.
    Type: Grant
    Filed: November 20, 2014
    Date of Patent: February 27, 2018
    Assignee: BP Corporation North America Inc.
    Inventor: Jeffrey Amelse
  • Patent number: 9452370
    Abstract: The present invention describes a process for the separation of xylenes in simulated counter-current utilising at least one adsorber with a limited cumulated total height (Hcu) of adsorbent and a superficial velocity (Vsl) of less than 2 cm/s.
    Type: Grant
    Filed: December 2, 2013
    Date of Patent: September 27, 2016
    Assignee: IFP ENERGIES NOUVELLES
    Inventors: Pascal Etienne, Philibert Leflaive, Damien Leinekugel Le Cocq, Catherine Laroche
  • Patent number: 9447001
    Abstract: This invention describes a process for separation of xylenes for the purpose of the production of high-purity metaxylene, a simulated countercurrent process using at least one adsorber with a limited cumulative total level (Hcu) of adsorbent at a surface velocity (Vsl) that is less than 2 cm/s.
    Type: Grant
    Filed: December 3, 2013
    Date of Patent: September 20, 2016
    Assignee: IFP Energies nouvelles
    Inventors: Pascal Etienne, Philibert Leflaive, Damien Leinekugel Le Cocq, Catherine Laroche
  • Patent number: 9050581
    Abstract: The present invention relates to aggregate zeolitic adsorbents based on zeolite X and zeolite LSX. These adsorbents are particularly suitable for separating C8 aromatic isomers and in particular xylenes, separating sugars, separating polyhydric alcohols, separating isomers of substituted toluenes, separating cresols, separating dichlorobenzenes.
    Type: Grant
    Filed: December 16, 2008
    Date of Patent: June 9, 2015
    Assignees: CECA S.A., Institut Francais Du Petrole
    Inventors: Ludivine Bouvier, Stéphane Kieger, Catherine Laroche, Philibert Leflaive, Tom Frising
  • Patent number: 9024105
    Abstract: A process according to various approaches includes flushing an intermediate transfer line between a raffinate stream transfer line and a desorbent stream transfer line away from the adsorptive separation chamber to remove residual fluid including desorbent from intermediate transfer line. The process may include directing the residual fluid flushed from the intermediate transfer line to a recycle stream to introduce the residual fluid into the adsorptive separation chamber.
    Type: Grant
    Filed: January 5, 2015
    Date of Patent: May 5, 2015
    Assignee: UOP LLC
    Inventor: Jason T. Corradi
  • Publication number: 20150112112
    Abstract: A process according to various approaches includes flushing an intermediate transfer line between a raffinate stream transfer line and a desorbent stream transfer line away from the adsorptive separation chamber to remove residual fluid including desorbent from intermediate transfer line. The process may include directing the residual fluid flushed from the intermediate transfer line to a recycle stream to introduce the residual fluid into the adsorptive separation chamber.
    Type: Application
    Filed: January 5, 2015
    Publication date: April 23, 2015
    Inventor: Jason T. Corradi
  • Publication number: 20150105600
    Abstract: Embodiments of adsorbents for separating para-xylene from a mixture of C8 alkyl aromatic hydrocarbons, methods for making such adsorbents, and methods for separating para-xylene using such adsorbents are provided. In one example, an adsorbent comprises a binderless adsorbent. The binderless adsorbent comprises zeolite X and has a K2O/(K2O+BaO+Na2O) molar ratio of from about 0.15 to about 0.4.
    Type: Application
    Filed: October 15, 2013
    Publication date: April 16, 2015
    Applicant: UOP LLC
    Inventors: Patrick C. Whitchurch, Santi Kulprathipanja, Gregory F. Maher
  • Patent number: 8993825
    Abstract: An aromatics complex producing one or more xylene isomers offers a large number of opportunities to conserve energy by heat exchange within the complex. One previously unrecognized opportunity is through providing two parallel distillation columns operating at different pressures to separate C8 aromatics from C9+ aromatics. The parallel columns offer additional opportunities to conserve energy within the complex through heat exchange in associated xylene recovery facilities.
    Type: Grant
    Filed: May 21, 2014
    Date of Patent: March 31, 2015
    Assignee: UOP LLC
    Inventors: Gregory R. Werba, Jason T. Corradi, Xin X. Zhu, David W. Ablin, Saadet Ulas Acikgoz, Phillip F. Daly
  • Publication number: 20150087876
    Abstract: Methods and systems for separating para-xylene are disclosed. In one exemplary embodiment, a method for separating para-xylene includes the steps of providing a feed stream including para-xylene and other C8 aromatic hydrocarbons to a first adsorbent bed within a radial flow simulated moving bed chamber and providing a desorbent stream to a second bed within the radial flow simulated moving bed chamber. The method further includes circulating the feed stream and the desorbent stream radially within the radial flow simulated moving bed chamber to third and fourth beds within the radial flow simulated moving bed chamber. Still further, the method includes withdrawing an extract stream including the para-xylene from the third bed and withdrawing a raffinate stream including the other C8 aromatic hydrocarbons from the fourth bed.
    Type: Application
    Filed: September 24, 2013
    Publication date: March 26, 2015
    Applicant: UOP LLC
    Inventor: Robert J. Sanger
  • Patent number: 8937209
    Abstract: A process for separating para-xylene from a plurality of aromatic compounds, wherein the process introduces a first mixed xylene stream comprising a plurality of xylene isomers into a first adsorptive separation unit to produce a first para-xylene enriched stream and a first raffinate stream. The process further introduces a second mixed xylene stream comprising a plurality of xylene isomers into a second adsorptive separation unit to produce a second para-xylene enriched stream and a second raffinate stream. The process further feeds both the first raffinate stream and the second raffinate stream into a shared raffinate column.
    Type: Grant
    Filed: December 15, 2011
    Date of Patent: January 20, 2015
    Assignee: UOP LLC
    Inventor: Jason T. Corradi
  • Patent number: 8933288
    Abstract: A process according to various approaches includes flushing an intermediate transfer line between a raffinate stream transfer line and a desorbent stream transfer line away from the adsorptive separation chamber to remove residual fluid including desorbent from intermediate transfer line. The process may include directing the residual fluid flushed from the intermediate transfer line to a recycle stream to introduce the residual fluid into the adsorptive separation chamber.
    Type: Grant
    Filed: March 20, 2013
    Date of Patent: January 13, 2015
    Assignee: UOP LLC
    Inventor: Jason T. Corradi
  • Publication number: 20140371510
    Abstract: Purge fluid from a vessel head in an adsorption process is distributed to recovery processes according to the purity of product contained in the fluid. Extract-rich fluid thus is routed directly to recovery of the extract product. Distribution preferably is determined by internal positioning of feed, desorbent and product streams in the adsorption vessel.
    Type: Application
    Filed: September 4, 2014
    Publication date: December 18, 2014
    Inventors: Jason T. Corradi, James W. Harris, Lewis H. Pettengill
  • Patent number: 8907152
    Abstract: A process of producing PX comprising providing a C8+ feedstock, the C8+ feedstock has C8 hydrocarbons and C9+ hydrocarbons, to a crystallization unit under crystallization conditions to produce a PX enriched stream having a PX concentration of at least 99.5 wt % based on the weight of the PX enriched stream, wherein the C8+ feedstock has a PX concentration of at least 70 wt % based on total weight of xylenes in the C8+ feedstock, which the C8+ feedstock having a C9+ hydrocarbons concentration in a range from 1 wppm to 10 wt % based on the total weight of the C8+ feedstock.
    Type: Grant
    Filed: July 2, 2013
    Date of Patent: December 9, 2014
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Timothy F. Kinn, Kevin J. Knob
  • Patent number: 8859448
    Abstract: Binderless BaKX zeolitic adsorbents, methods for their production, and processes for their use in a liquid phase adsorptive separation process are provided. An adsorbent includes a binder-converted zeolite portion formed from x wt % kaolin clay binder and (100?x) wt % unconverted Zeolite X with a silica:alumina molar ratio of about 2.5. The kaolin clay binder is in the range of about 10 to about 20 wt %. Ba and K occupy cationic exchangeable sites within the adsorbent. K is in the range of about 0.25 to about 0.9% by weight and Ba is greater than about 31.6% by weight of the binderless BaKX zeolitic adsorbent. Cornstarch may be added to the Zeolite X and kaolin clay binder to increase adsorbent macro-porosity and pore volume. Productivity of the adsorbent is improved decreasing process operating costs. The mechanical strength of the adsorbent is also improved.
    Type: Grant
    Filed: September 5, 2012
    Date of Patent: October 14, 2014
    Assignee: UOP LLC
    Inventors: Linda Shi Cheng, Jack Hurst
  • Publication number: 20140288345
    Abstract: A process according to various approaches includes flushing an intermediate transfer line between a raffinate stream transfer line and a desorbent stream transfer line away from the adsorptive separation chamber to remove residual fluid including desorbent from intermediate transfer line. The process may include directing the residual fluid flushed from the intermediate transfer line to a recycle stream to introduce the residual fluid into the adsorptive separation chamber.
    Type: Application
    Filed: March 20, 2013
    Publication date: September 25, 2014
    Applicant: UOP LLC
    Inventor: Jason T. Corradi
  • Patent number: 8841503
    Abstract: Purge fluid from a vessel head in an adsorption process is distributed to recovery processes according to the purity of product contained in the fluid. Extract-rich fluid thus is routed directly to recovery of the extract product. Distribution preferably is determined by internal positioning of feed, desorbent and product streams in the adsorption vessel.
    Type: Grant
    Filed: May 26, 2011
    Date of Patent: September 23, 2014
    Assignee: UOP LLC
    Inventors: Jason T. Corradi, James W. Harris, Lewis H. Pettengill
  • Patent number: 8821732
    Abstract: A device (SMB) for separation by simulated moving bed adsorption comprises a plurality of elementary zones Zi in series operating in a closed loop, each of said zones comprising, between two successive fluid injection or extraction points, a unique bed Li of adsorbant solid with volume VAi and a non-selective free volume Vi, in which the majority of the zones are ordinary elementary zones each having an identical volume VA of the same adsorbant S, and a substantially identical non-selective free volume equal to V; the device also comprises at least one particular elementary zone Z0, termed the particular elementary zone, comprising a non-selective free volume V0 which is greater than V, and a unique bed L0 of adsorbant S0 with volume VA0 which is less than VA, S0 having a volume adsorption capacity C0 which is greater than that, C, of S, such that the overall adsorption capacity C0×VA0 of Z0 is closer to the overall adsorption capacity C×VA of each of the ordinary elementary zones than the overall adsorption
    Type: Grant
    Filed: December 1, 2008
    Date of Patent: September 2, 2014
    Assignee: IFP Energies Nouvelles
    Inventors: Philibert Leflaive, Tom Frising, Damien Leinekugel-Le-cocq, Gerard Hotier
  • Patent number: 8802914
    Abstract: A process for separating para-xylene from a plurality of xylene isomers, wherein the process introduces at a first feed point a first mixed xylene stream comprising a plurality of xylene isomers into a first adsorptive separation unit to produce a first para-xylene enriched stream and a first raffinate stream, and introduces a second mixed xylene stream comprising a plurality of xylene isomers into a second adsorptive separation unit to produce a second raffinate stream. The process feeds both the first raffinate stream and the second raffinate stream into a raffinate column. The process further introduces an extract stream from the second adsorptive separation unit into a first input of a split extract column comprising an internal partition defining a first distillation zone and a second distillation zone.
    Type: Grant
    Filed: December 15, 2011
    Date of Patent: August 12, 2014
    Assignee: UOP LLC
    Inventor: Jason T. Corradi
  • Patent number: 8802913
    Abstract: A process for separating a product from a multicomponent feedstream to an adsorption apparatus or system is described. The apparatus or system may comprise a moving-bed or a simulated moving-bed adsorption means. The product comprises at least one organic compound, such as an aryl compound with alkyl substitutes. In embodiments the conduits used to supply the feedstream to the apparatus or system are flushed with media of multiple grades. The improvement is a more efficient use of the desorbent. In embodiments the process achieves improvements in one or more of efficiency of adsorption separation, capacity of adsorption apparatus systems, and purity of product attainable by adsorption process.
    Type: Grant
    Filed: October 3, 2013
    Date of Patent: August 12, 2014
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventor: John R. Porter
  • Patent number: 8772564
    Abstract: This invention relates to a method wherein a high-purity paraxylene can be produced efficiently by using a catalyst having a molecular sieving action (or shape selectivity) and being excellent in the catalytic activity without isomerization and adsorption-separation steps. More particularly, it relates to a method of producing a high-purity paraxylene, characterized in that MFI type zeolite having a primary particle size of not more than 100 ?m, a structure defining agent and silica material having an average particle size of not less than 10 nm but less than 1.0 ?m are used as a starting material, and a synthetic zeolite catalyst produced by subjecting the MFI type zeolite to a coating treatment with an aqueous solution obtained by mixing so as to satisfy X×Y<0.05 (wherein X is a concentration of the silica material (mol %) and Y is a concentration of the structure defining agent (mol %)) is used in the alkylation or disproportionation of at least one of benzene and toluene as a starting material.
    Type: Grant
    Filed: September 29, 2009
    Date of Patent: July 8, 2014
    Assignee: JX Nippon Oil & Energy Corporation
    Inventors: Koichi Matsushita, Chikanori Nakaoka, Norikazu Nishiyama
  • Patent number: 8754281
    Abstract: An aromatics complex producing one or more xylene isomers offers a large number of opportunities to conserve energy by heat exchange within the complex. One previously unrecognized opportunity is through providing two parallel distillation columns operating at different pressures to separate C8 aromatics from C9+ aromatics. The parallel columns offer additional opportunities to conserve energy within the complex through heat exchange in associated xylene recovery facilities.
    Type: Grant
    Filed: August 25, 2010
    Date of Patent: June 17, 2014
    Assignee: UOP LLC
    Inventors: Gregory R. Werba, Jason T. Corradi, Zin X. Zhu, David W. Ablin, Saadet Ulas Acikgoz
  • Publication number: 20140155672
    Abstract: The present invention describes a process for the separation of xylenes in simulated counter-current utilising at least one adsorber with a limited cumulated total height (Hcu) of adsorbent and a superficial velocity (Vsl) of less than 2 cm/s.
    Type: Application
    Filed: December 2, 2013
    Publication date: June 5, 2014
    Applicant: IFP ENERGIES NOUVELLES
    Inventors: Pascal ETIENNE, Philibert LEFLAIVE, Damien LEINEKUGEL LE COCQ, Catherine LAROCHE
  • Publication number: 20140155673
    Abstract: This invention describes a process for separation of xylenes for the purpose of the production of high-purity metaxylene, a simulated countercurrent process using at least one adsorber with a limited cumulative total level (Hcu) of adsorbent at a surface velocity (Vsl) that is less than 2 cm/s.
    Type: Application
    Filed: December 3, 2013
    Publication date: June 5, 2014
    Applicant: IFP Energies nouvelles
    Inventors: Pascal ETIENNE, Philibert LEFLAIVE, Damien LEINEKUGEL LE COCQ, Catherine LAROCHE
  • Publication number: 20140155674
    Abstract: The present invention relates to a process for separating isomers by simulated moving bed (SMB) adsorption, comprising separating the raw materials comprising isomers by SMB adsorption, said SMB comprising many adsorption beds each of which is equipped with grids, each of the grids being equipped with the feedstock inlet and outlet pipeline of the bed, the feedstock charged into and discharged from SMB at least comprising feedstocks, desorbent, extract, and raffinate, the extract being enriched with the target product, characterized in that the extract is used as a flushing liquid and respectively charged to first or second bed at the upstream of the feedstock charging position and to one of second to fourth beds at the downstream of the extract withdrawing position. Such process is used for separation of C8 aromatic isomers by adsorption, and can improve the capacity of the device while effectively increasing the purity of the target product separated by adsorption.
    Type: Application
    Filed: July 16, 2012
    Publication date: June 5, 2014
    Inventors: Dehua Wang, Zhuo Yu, Huiguo Wang, Jiangfeng Ma
  • Patent number: 8735643
    Abstract: The invention relates to aggregate zeolitic adsorbents based on faujasite X type zeolite powder having a low silica content and small crystals, exchanged with barium or based on faujasite X type zeolite having a low silica content and small crystals, exchanged with barium and potassium. The invention also relates to the method for preparing said aggregate zeolitic adsorbents, and also their uses for separating sugars, polyhydric alcohols, isomers of substituted toluene, cresols, or for recovering very high purity paraxylene.
    Type: Grant
    Filed: December 16, 2008
    Date of Patent: May 27, 2014
    Assignees: Cece S.A., Institut Francais du Petrole
    Inventors: Ludivine Bouvier, Stéphane Kieger, Catherine Laroche, Philibert Leflaive, Tom Frising
  • Patent number: 8722955
    Abstract: A device (SMB) for separation by simulated moving bed adsorption comprises a plurality of elementary adsorption zones Zi in series operating in a closed loop, and at least one singular adsorption zone with a dead volume which is greater than the adsorption zones Zi, the solid adsorbant of said singular adsorption zone having a granulometry which is lower than that of the solid adsorbant of the ordinary adsorption zones.
    Type: Grant
    Filed: March 24, 2009
    Date of Patent: May 13, 2014
    Assignee: IFP Energies Nouvelles
    Inventors: Gerard Hotier, Tom Frising, Philibert Leflaive, Damien Leinekugel le Coco
  • Patent number: 8704031
    Abstract: A method for separating a xylene from a feed mixture by contacting the feed mixture with a bed of adsorbent comprising metal organic framework crystals selective to the xylene.
    Type: Grant
    Filed: June 30, 2010
    Date of Patent: April 22, 2014
    Assignee: UOP LLC
    Inventors: Santi Kulprathipanja, Richard R. Willis, Annabelle Benin, John J. Low
  • Patent number: 8697928
    Abstract: A process for separating para-xylene from a plurality of aromatic compounds, wherein the process introduces a mixed xylene feed stream comprising a plurality of xylene isomers into a first separation assembly to produce a first para-xylene enriched stream and a first raffinate stream. The process further feeds the raffinate stream into an isomerization unit to convert the raffinate stream into an isomerization reactor product stream, and introduces the isomerization reactor product stream into to a second para-xylene adsorptive separation unit to produce a second para-xylene enriched stream and a second raffinate stream.
    Type: Grant
    Filed: December 15, 2011
    Date of Patent: April 15, 2014
    Assignee: UOP LLC
    Inventor: Jason T. Corradi
  • Patent number: 8658848
    Abstract: A process for the production of para-xylene by simulated counter-current adsorption with high flexibility with respect to a reference run (100%) uses 2 adsorbers each with 12 beds, said adsorbers being able to be connected in accordance with 3 different modes; the flexibility obtained is 50% to 150%.
    Type: Grant
    Filed: August 24, 2012
    Date of Patent: February 25, 2014
    Assignee: IFP Energies nouvelles
    Inventors: Damien Leinekugel Le Cocq, Philibert Leflaive, Luc Wolff, Gerard Hotier
  • Patent number: 8641906
    Abstract: The invention concerns a device for distributing fluids which are to supply a multi-stage column having a succession of plates, each plate supporting a bed of granular solid (2) and being provided with a network for distributing said fluids constituted by substantially horizontal lines (6) having a plurality of degrees of branching from 1 to rank N, the ensemble of lines from rank P to rank N being adherent to the base plane of the plate under consideration, and the lines of the last degree of branching N communicating with mixing chambers (8) disposed immediately below said base plane.
    Type: Grant
    Filed: March 24, 2009
    Date of Patent: February 4, 2014
    Assignee: IFP Energies Nouvelles
    Inventor: Frederic Augier
  • Patent number: 8609925
    Abstract: Adsorbents and methods for the adsorptive separation of para-xylene from a mixture containing at least one other C8 aromatic hydrocarbon (e.g., a mixture of ortho-xylene, meta-xylene, para-xylene, and ethylbenzene) are described. Suitable adsorbents comprise zeolite X having an average crystallite size of less than 1.8 microns. The adsorbents provide improved mass transfer, which is especially advantageous for improving productivity in low temperature, low cycle time adsorptive separation operations in a simulated moving bed mode.
    Type: Grant
    Filed: June 30, 2008
    Date of Patent: December 17, 2013
    Assignee: UOP LLC
    Inventors: Linda Shi Cheng, James A. Johnson
  • Patent number: 8609922
    Abstract: An aromatics complex producing one or more xylene isomers offers a large number of opportunities to conserve energy by heat exchange within the complex. One previously unrecognized opportunity is through providing two parallel distillation columns operating at different pressures to separate C8 aromatics from C9+ aromatics. The parallel columns offer additional opportunities to conserve energy within the complex through heat exchange in associated xylene recovery facilities.
    Type: Grant
    Filed: August 25, 2010
    Date of Patent: December 17, 2013
    Assignee: UOP LLC
    Inventors: Gregory R. Werba, Xin X. Zhu, Phillip F. Daly, Saadet Ulas Acikgoz, Jason T. Corradi, David W. Ablin
  • Patent number: 8609918
    Abstract: This invention relates to a method of efficiently producing a high-purity para-substituted aromatic hydrocarbon while suppressing caulking without requiring isomerization-adsorption separation steps, and more particularly to a method of producing a para-substituted aromatic hydrocarbon, characterized in that a methylating agent and an aromatic hydrocarbon are reacted in the presence of a catalyst formed by coating MFI type zeolite having a particle size of not more than 100 ?m with a crystalline silicate.
    Type: Grant
    Filed: March 26, 2009
    Date of Patent: December 17, 2013
    Assignee: JX Nippon Oil & Energy Corporation
    Inventors: Koichi Matsushita, Chikanori Nakaoka, Naoharu Igarashi, Makoto Oyamada
  • Publication number: 20130331633
    Abstract: A process for separating a product from a multicomponent feedstream to an adsorption apparatus or system. The apparatus or system may comprise a moving-bed or a simulated moving-bed adsorption means. The product comprises at least one organic compound, such as an aryl compound with alkyl substitutes. In embodiments the conduits used to supply the feedstream to the apparatus or system are flushed with media of multiple grades. In embodiments the process achieves improvements in one or more of efficiency of adsorption separation, capacity of adsorption apparatus systems, and purity of product attainable by adsorption process.
    Type: Application
    Filed: August 12, 2013
    Publication date: December 12, 2013
    Inventors: Anthony Go, Dana L. Pilliod, John R. Porter
  • Patent number: 8580120
    Abstract: A process for separating a product from a multicomponent feedstream to an adsorption apparatus or system is described. The apparatus or system may comprise a moving-bed or a simulated moving-bed adsorption means. The product comprises at least one organic compound, such as an aryl compound with alkyl substitutes. In embodiments the conduits used to supply the feedstream to the apparatus or system are flushed with media of multiple grades. The improvement is a more efficient use of the desorbent. In embodiments the process achieves improvements in one or more of efficiency of adsorption separation, capacity of adsorption apparatus systems, and purity of product attainable by adsorption process.
    Type: Grant
    Filed: March 20, 2012
    Date of Patent: November 12, 2013
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventor: John R. Porter
  • Patent number: 8569564
    Abstract: A process for separating a product from a multicomponent feedstream to an adsorption apparatus or system is described. The apparatus or system may comprise a moving-bed or a simulated moving-bed adsorption means. The product comprises at least one organic compound, such as an aryl compound with alkyl substitutes. In embodiments the conduits used to supply the feedstream to the apparatus or system are flushed with media of multiple grades. The improvement is more efficient use of the desorbent. In embodiments the process achieves improvements in one or more of efficiency of adsorption separation, capacity of adsorption apparatus systems, and purity of product attainable by adsorption process.
    Type: Grant
    Filed: March 23, 2011
    Date of Patent: October 29, 2013
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: John R. Porter, Dana L. Pilliod
  • Patent number: 8558049
    Abstract: A process for separating para-xylene from aromatic compounds is presented. The process introduces throughout a first step-time interval a first mixed xylene stream into a first feed input on a first adsorptive separation unit comprising multiple bed lines. The process further introduces throughout the first step-time interval a second mixed xylene stream into a second feed input on the first adsorptive separation unit. During a first portion of the first step-time interval, the process introduces material from a feed stream used during the first step-time interval into a bed line not used to deliver a stream into, or withdraw a stream from, the first adsorptive separation unit during the first step time interval. During a second portion of the first step-time interval, the process introduces material from a purification zone into the feed stream used during the first step-time interval.
    Type: Grant
    Filed: December 15, 2011
    Date of Patent: October 15, 2013
    Assignee: UOP LLC
    Inventors: Jason T. Corradi, Sara A. Williams, Stanley J. Frey
  • Patent number: 8530367
    Abstract: The present invention relates to agglomerated zeolitic adsorbents based on zeolite X with an Si/Al ratio such that 1.15<Si/AL<1.5, consisting of crystals with a mean diameter of 1.7 mm or less and of an inert binder, at least 90% of the exchangeable cationic sites of the zeolite X being occupied by barium ions. They may be obtained by agglomerating a zeolite X powder having a mean diameter of 1.7 mm or less with a binder, followed by zeolitization of the binder, exchange of the zeolite ions with barium (and potassium) ions and activation of the adsorbents thus exchanged.
    Type: Grant
    Filed: July 13, 2007
    Date of Patent: September 10, 2013
    Assignees: CECA S.A., IFP Energies Nouvelles
    Inventors: Ludivine Bouvier, Stephane Kieger, Catherine Laroche, Philibert Leflaive, Dominique Plee
  • Patent number: 8529757
    Abstract: A process for separating a product from a multicomponent feedstream to an adsorption apparatus or system. The apparatus or system may comprise a moving-bed or a simulated moving-bed adsorption means. The product comprises at least one organic compound, such as an aryl compound with alkyl substitutes. In embodiments the conduits used to supply the feedstream to the apparatus or system are flushed with media of multiple grades. In embodiments the process achieves improvements in one or more of efficiency of adsorption separation, capacity of adsorption apparatus systems, and purity of product attainable by adsorption process.
    Type: Grant
    Filed: May 5, 2010
    Date of Patent: September 10, 2013
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Anthony Go, Dana Lynn Pilliod, John R. Porter
  • Patent number: 8502008
    Abstract: A process of producing PX comprising providing a C8+ feedstock, the C8+ feedstock has C8 hydrocarbons and C9+ hydrocarbons, to a crystallization unit under crystallization conditions to produce a PX enriched stream having a PX concentration of at least 99.5 wt % based on the weight of the PX enriched stream, wherein the C8+ feedstock has a PX concentration of at least 70 wt % based on total weight of xylenes in the C8+ feedstock, which the C8+ feedstock having a C9+ hydrocarbons concentration in a range from 1 wppm to 10 wt % based on the total weight of the C8+ feedstock.
    Type: Grant
    Filed: September 10, 2012
    Date of Patent: August 6, 2013
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Timothy F. Kinn, Kevin J. Knob
  • Patent number: 8481798
    Abstract: There is provided a closed loop purity and recovery control system and process for operating a xylene purification system such as a Parex unit.
    Type: Grant
    Filed: April 30, 2010
    Date of Patent: July 9, 2013
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Robert A. Schaefer, Robert L. Long
  • Publication number: 20130158335
    Abstract: A process according to various approaches includes flushing residual fluid within an intermediate transfer line of a purification zone between a feed stream transfer line and the extract stream transfer line away from the adsorptive separation chamber to remove at least a portion of the residual fluid from the intermediate transfer line. The process may include directing the residual fluid flushed from the intermediate transfer line to another intermediate transfer line of the purification zone to flush residual fluid of the other transfer line into the purification zone for separation of the preferentially adsorbed component from the non-preferentially adsorbed component present in the other transfer line residual fluid.
    Type: Application
    Filed: September 28, 2012
    Publication date: June 20, 2013
    Applicant: UOP LLC
    Inventor: UOP LLC
  • Publication number: 20130116495
    Abstract: The present process comprises a means for energy savings in one or more process pumps by driving the one or more pumps with a variable-speed driving means. The invention is particularly useful in the separation of an adsorbed product from a mixture of components using simulated-moving-bed adsorption associated with a large circulating stream pumped with variable-speed driving means for conservation of energy relative to the known art. The improvement is particularly applicable to a process for the separation of para-xylene from mixed C8 aromatics.
    Type: Application
    Filed: November 9, 2011
    Publication date: May 9, 2013
    Applicant: UOP LLC
    Inventors: Stanley J. Frey, Lewis H. Pettengill, Michael R. Van de Cotte
  • Publication number: 20130116485
    Abstract: A process for adsorption separation uses a solid IM-12 type adsorbent to separate a molecular species from any feed.
    Type: Application
    Filed: November 26, 2012
    Publication date: May 9, 2013
    Applicant: IFP ENERGIES NOUVELLES
    Inventor: IFP ENERGIES NOUVELLES
  • Patent number: 8431764
    Abstract: A process for separating para-xylene from a mixture of C8 alkylaromatics comprises contacting the mixture of C8 alkylaromatics with a zeolitic binder-converted composition comprising (a) a zeolite X composition having at least a first zeolite X having a mean diameter not greater than 2.7 microns, and a second zeolite X, wherein the second zeolite X is obtained by converting a binder material to the second zeolite X and the binder material is in a range from 5 to 50 wt % of the zeolite X composition; and (b) an unconverted binder material content, after conversion to the second zeolite X is complete, in a range from 0 to 3 wt % of the zeolite X composition. The zeolite X composition has an average Si/Al framework mole ratio in a range from 1.0 to 1.5, and a relative LTA intensity not greater than 1.0, as determined by x-ray diffraction (XRD).
    Type: Grant
    Filed: March 22, 2012
    Date of Patent: April 30, 2013
    Assignee: UOP LLC
    Inventors: Jack E. Hurst, Linda S. Cheng, Robert W. Broach
  • Patent number: 8404918
    Abstract: The present process comprises a means for energy savings in a process pump by combining the pump with a power-recovery turbine. The invention is particularly useful in the separation of a desired product from a mixture of components using simulated-moving-bed adsorption associated with a large circulating stream with a power-recovery turbine feature for conservation of energy relative to the known art. The improvement is particularly applicable to a process for the separation of para-xylene from mixed C8 aromatics.
    Type: Grant
    Filed: September 28, 2009
    Date of Patent: March 26, 2013
    Assignee: UOP LLC
    Inventor: Stanley J. Frey