Patents by Inventor Gregory F. Maher

Gregory F. Maher has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 9611194
    Abstract: A simulated moving bed separator and methods for isolating a desired component are provided. A method includes removing a raffinate from a raffinate bed of a simulated moving bed separator. The raffinate includes an undesired component, and the simulated moving bed separator includes a plurality of adsorbent beds circularly coupled together, a distributor, and a plurality of conduits coupling the distributor to the plurality of adsorbent beds. The adsorbent beds include the raffinate bed, a desorbent bed, and a zone 4 flush bed positioned between the raffinate bed and the desorbent bed. Desorbent is added to the desorbent bed through a desorbent conduit. The zone 4 flush conduit is flushed to the desorbent conduit, where the zone 4 flush conduit is coupled to the zone 4 flush bed.
    Type: Grant
    Filed: August 15, 2014
    Date of Patent: April 4, 2017
    Assignee: UOP LLC
    Inventor: Gregory F. Maher
  • Publication number: 20160046545
    Abstract: A simulated moving bed separator and methods for isolating a desired component are provided. A method includes removing a raffinate from a raffinate bed of a simulated moving bed separator. The raffinate includes an undesired component, and the simulated moving bed separator includes a plurality of adsorbent beds circularly coupled together, a distributor, and a plurality of conduits coupling the distributor to the plurality of adsorbent beds. The adsorbent beds include the raffinate bed, a desorbent bed, and a zone 4 flush bed positioned between the raffinate bed and the desorbent bed. Desorbent is added to the desorbent bed through a desorbent conduit. The zone 4 flush conduit is flushed to the desorbent conduit, where the zone 4 flush conduit is coupled to the zone 4 flush bed.
    Type: Application
    Filed: August 15, 2014
    Publication date: February 18, 2016
    Inventor: Gregory F. Maher
  • Patent number: 9222034
    Abstract: A process for removing at least one product from coal tar is described. The process involves extraction with an extraction agent or adsorption with an adsorbent. The extraction agent includes at least one of amphiphilic block copolymers, cyclodextrins, functionalized cyclodextrins, and cyclodextrin-functionalized polymers, and the adsorbent includes exfoliated graphite oxide, thermally exfoliated graphite oxide or intercalated graphite compounds.
    Type: Grant
    Filed: August 28, 2014
    Date of Patent: December 29, 2015
  • Patent number: 9199199
    Abstract: A separation membrane is described. The separation membrane comprises a porous inorganic membrane, the pores of the inorganic membrane being coated with a polybenzoxazole polymer coating. Methods of making the separation membrane and methods of separating xylenes using the separation membrane are also described.
    Type: Grant
    Filed: October 5, 2012
    Date of Patent: December 1, 2015
    Assignee: UOP LLC
    Inventors: Chunqing Liu, Gregory F. Maher
  • Patent number: 9162952
    Abstract: A process for purifying at least one product from coal tar is described. The process involves separating a coal tar fraction having a boiling point in the range of about 180° C. to about 230° C. into an acidic portion and a non-acidic portion by contacting the fraction with a caustic compound. The acidic portion is separated into a cresol portion and a xylenol portion, and the non-acidic portion is separated into a naphthalene portion and a naphthalene co-boiler portion. The acidic portion and the non-acidic portions are separated by contacting with an adsorbent comprising small, discrete crystallites, the adsorbent having less than 10 wt % amorphous binder component. The various portions can be separated in a similar manner.
    Type: Grant
    Filed: August 28, 2014
    Date of Patent: October 20, 2015
  • Publication number: 20150136660
    Abstract: A process for removing at least one contaminant from coal tar is described. The process involves extraction with an extraction agent or adsorption with an adsorbent. The extraction agent includes at least one of amphiphilic block copolymers, inclusion complexes of poly(methyl methacrylate) and polycyclic aromatic hydrocarbons, cyclodextrins, functionalized cyclodextrins, and cyclodextrin-functionalized polymers, and the adsorbent includes exfoliated graphite oxide, thermally exfoliated graphite oxide or intercalated graphite compounds.
    Type: Application
    Filed: August 28, 2014
    Publication date: May 21, 2015
  • Publication number: 20150136648
    Abstract: Methods of treating coal tar using reactive distillation are described. The methods include introducing a coal tar stream into a reactive distillation zone which has a reaction zone and a separation zone. The reaction zone contains a hydrotreating catalyst and an absorbent. The coal tar stream is contacted with a hydrogen stream in the reaction zone to remove contaminants from the coal tar stream, and the treated coal tar stream is separated into at least two fractions.
    Type: Application
    Filed: August 28, 2014
    Publication date: May 21, 2015
  • Publication number: 20150136696
    Abstract: A process for treating water used in a coal tar process is described. The process involves treating the water with extraction with an extraction agent or adsorption with an adsorbent. The extraction agent includes at least one of amphiphilic block copolymers, cyclodextrins, functionalized cyclodextrins, and soluble cyclodextrin-functionalized polymers, and the adsorbent includes insoluble cyclodextrin-functionalized polymers, exfoliated graphite oxide, thermally exfoliated graphite oxide or intercalated graphite compounds.
    Type: Application
    Filed: August 28, 2014
    Publication date: May 21, 2015
  • Publication number: 20150136650
    Abstract: A process for removing mercury from a coal tar product is described. A coal tar stream is contacted with a solvent to remove a product, and the product stream is contacted with an adsorbent material to remove elemental mercury, organic mercury compounds, and/or inorganic mercury compounds. Alternatively, the coal tar stream can be treated in a catalytic distillation zone of a fractionation zone.
    Type: Application
    Filed: August 28, 2014
    Publication date: May 21, 2015
  • Publication number: 20150141701
    Abstract: A process for removing at least one product from coal tar is described. The process involves extraction with an extraction agent or adsorption with an adsorbent. The extraction agent includes at least one of amphiphilic block copolymers, cyclodextrins, functionalized cyclodextrins, and cyclodextrin-functionalized polymers, and the adsorbent includes exfoliated graphite oxide, thermally exfoliated graphite oxide or intercalated graphite compounds.
    Type: Application
    Filed: August 28, 2014
    Publication date: May 21, 2015
  • Publication number: 20150141708
    Abstract: A process for purifying at least one product from coal tar is described. The process involves separating a coal tar fraction having a boiling point in the range of about 180° C. to about 230° C. into an acidic portion and a non-acidic portion by contacting the fraction with a caustic compound. The acidic portion is separated into a cresol portion and a xylenol portion, and the non-acidic portion is separated into a naphthalene portion and a naphthalene co-boiler portion. The acidic portion and the non-acidic portions are separated by contacting with an adsorbent comprising small, discrete crystallites, the adsorbent having less than 10 wt % amorphous binder component. The various portions can be separated in a similar manner.
    Type: Application
    Filed: August 28, 2014
    Publication date: May 21, 2015
  • Publication number: 20150136654
    Abstract: A process for treating a pitch fraction from coal tar is described. The pitch fraction is contacted with a solvent, an extraction agent, or an adsorbent to remove at least one contaminant, such as oxygenate compounds, nitrogen containing compounds, and sulfur containing compounds. The solvent can be an ionic liquid, the extraction agent can be at least one of amphiphilic block copolymers, cyclodextrins, functionalized cyclodextrins, and cyclodextrin-functionalized polymers, and the adsorbent can be exfoliated graphite oxide, thermally exfoliated graphite oxide or intercalated graphite compounds.
    Type: Application
    Filed: August 28, 2014
    Publication date: May 21, 2015
  • 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
  • Publication number: 20140100406
    Abstract: A separation membrane is described. The separation membrane comprises a porous inorganic membrane, the pores of the inorganic membrane being coated with a polybenzoxazole polymer coating. Methods of making the separation membrane and methods of separating xylenes using the separation membrane are also described.
    Type: Application
    Filed: October 5, 2012
    Publication date: April 10, 2014
    Inventors: Chunqing Liu, Gregory F. Maher
  • Publication number: 20130213086
    Abstract: Methods and apparatuses for processing natural gas are provided. In a method for processing a natural gas stream, the natural gas stream is fractionated to form an overhead stream and a bottoms stream. The overhead stream is separated with a membrane to form a methane rich residual stream and a permeate stream.
    Type: Application
    Filed: February 17, 2012
    Publication date: August 22, 2013
    Applicant: UOP LLC
    Inventor: Gregory F. Maher
  • Patent number: 8247630
    Abstract: A process for isomerizing ethylbenzene into xylenes such as para-xylene using a zeolitic catalyst system based on low Si/Al2 MTW-type zeolite that preferably is substantially free of mordenite. The catalyst may be bimetallic where the two metals are platinum and tin.
    Type: Grant
    Filed: March 12, 2009
    Date of Patent: August 21, 2012
    Assignee: UOP LLC
    Inventors: Paula L. Bogdan, John E. Bauer, E. Alejandro Leon-Escamilla, Gregory F. Maher, Robert B. Larson
  • Patent number: 7875757
    Abstract: A reforming and isomerization process has been developed. A reforming feedstream is charged to a reforming zone containing a reforming catalyst and operating at reforming conditions to generate a reforming zone effluent. Hydrogen and an isomerization feedstream is charged into an isomerization zone to contact an isomerization catalyst at isomerization conditions to increase the branching of the hydrocarbons. The isomerization catalyst is a solid acid catalyst comprising a support comprising a sulfated oxide or hydroxide of at least an element of Group IVB, a first component being at least one lanthanide series element, mixtures thereof, or yttrium, and a second component being a platinum group metal or mixtures thereof. The reforming zone effluent and the isomerization zone effluent are each separated to form a light ends stream and a product stream. The light ends streams are combined for processing in a net gas re-contacting zone.
    Type: Grant
    Filed: May 29, 2008
    Date of Patent: January 25, 2011
    Assignee: UOP LLC
    Inventors: Douglas A. Nafis, Gregory F. Maher, Lynn H. Rice, William D. Schlueter, Ralph D. Gillespie, Michelle J. Cohn
  • Publication number: 20090171135
    Abstract: A process for isomerizing ethylbenzene into xylenes such as para-xylene using a zeolitic catalyst system based on low Si/Al2 MTW-type zeolite that preferably is substantially free of mordenite. The catalyst may be bimetallic where the two metals are platinum and tin.
    Type: Application
    Filed: March 12, 2009
    Publication date: July 2, 2009
    Inventors: Paula L. Bogdan, John E. Bauer, E. Alejandro Leon-Escamilla, Gregory F. Maher, Robert B. Larson
  • Patent number: 7544849
    Abstract: 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: Grant
    Filed: May 22, 2008
    Date of Patent: June 9, 2009
    Assignee: UOP LLC
    Inventors: Edwin P. Boldingh, Antoine Negiz, Gregory F. Maher, Paula L. Bogdan, Dean E. Rende
  • Publication number: 20090143218
    Abstract: One exemplary embodiment can be a regeneration process for a C8 alkylaromatic isomerization catalyst. The process can include: contacting the C8 alkylaromatic isomerization catalyst with a first gas stream comprising an oxidizing gas at a first stage for a first time period and a first temperature effective to remove at least a portion of a carbonaceous material from the C8 alkylaromatic isomerization catalyst; and contacting the C8 alkylaromatic isomerization catalyst with a second gas stream comprising the oxidizing gas at a second stage for a second time period and a second temperature effective to remove another portion of the carbonaceous material from the C8 alkylaromatic isomerization catalyst.
    Type: Application
    Filed: December 3, 2007
    Publication date: June 4, 2009
    Inventors: Paula L. Bogdan, Gregory F. Maher, John E. Bauer, Patrick C. Whitchurch