Patents by Inventor Robert A. Ware

Robert A. Ware 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: 7119239
    Abstract: A process is provided for the production of xylenes from reformate. The process is carried out by methylating under conditions effective for the methylation, the benzene/toluene present in the reformate outside the reforming loop, to produce a resulting product having a higher xylenes content than the reformate. Greater than equilibrium amounts of para-xylene can be produced by the process.
    Type: Grant
    Filed: December 24, 2003
    Date of Patent: October 10, 2006
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: David L. Johnson, Robert G. Tinger, Robert A. Ware, John S. Buchanan, Xiaobing Feng, Shifang Luo, Gary D. Mohr
  • Patent number: 6835863
    Abstract: A C4+ naphtha hydrocarbon feed is converted to light olefins and aromatics, by contacting the feed with a catalyst containing ZSM-5 and/or ZSM-11, a substantially inert matrix material such as silica and/or clay, having less than about 20 wt % active matrix material based on total catalyst composition, and phosphorus.
    Type: Grant
    Filed: July 12, 1999
    Date of Patent: December 28, 2004
    Assignee: ExxonMobil Oil Corporation
    Inventors: Art W. Chester, Ke Liu, Robert A. Ware
  • Publication number: 20040158111
    Abstract: A process is provided for the production of xylenes from reformate. The process is carried out by methylating under conditions effective for the methylation, the benzene/toluene present in the reformate outside the reforming loop, to produce a resulting product having a higher xylenes content than the reformate. Greater than equilibrium amounts of para-xylene can be produced by the process.
    Type: Application
    Filed: December 24, 2003
    Publication date: August 12, 2004
    Inventors: David L. Johnson, Robert G. Tinger, Robert A. Ware, John S. Buchanan, Xiaobing Feng, Shifang Luo, Gary D. Mohr
  • Patent number: 6642426
    Abstract: A system and process for producing xylene and other alkylated aromatics includes one or more fluidized bed reaction zones that provide contact between the reactants (i.e., an aromatic reactant and an alkylating reagent). Improved conversion and selectivity is realized when the alkylating reagent is stagewise injected into the fluidized bed at one or more locations downstream from the location of aromatic reactant introduction into the fluidized bed. Preferably, the alkylating reagent is introduced at a plurality of locations along the axial direction of the fluidized bed reaction zone, or at plural locations between a plurality of different fluidized bed reaction zones.
    Type: Grant
    Filed: October 5, 1998
    Date of Patent: November 4, 2003
    Inventors: David L. Johnson, Robert G. Tinger, Robert A. Ware, Sergei Yurchak
  • Patent number: 6538167
    Abstract: There is provided a process for converting methanol and/or dimethyl ether to a product containing C2 to C4 olefins which comprises the step of contacting a feed which contains methanol and/or dimethyl ether with a catalyst comprising a porous crystalline material. The contacting is conducted in the presence of a cofed aromatic compound under conversion conditions including a temperature of about 350° C. to about 550° C. and a methanol and/or dimethyl ether partial pressure less than or equal to 50 psia (345 kPa). The porous crystalline material used in the catalyst has a pore size greater than the critical diameter of the aromatic compound and a Diffusion Parameter for 2,2-dimethylbutane of about 0.1 to about 26 sec−1 when measured at a temperature of 120° C. and a 2,2- dimethylbutane pressure of 60 torr (8 kPa), and the aromatic compound is capable of alkylation by the methanol and/or dimethyl ether under said conversion conditions.
    Type: Grant
    Filed: October 13, 2000
    Date of Patent: March 25, 2003
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Stephen H. Brown, William A. Weber, Reuel Shinnar, Khushrav E. Nariman, Larry A. Green, Mark F. Mathias, David H. Olson, Robert A. Ware
  • Patent number: 6506954
    Abstract: There is provided a process for converting methanol and/or dimethyl ether to a product containing olefin, e.g., C2 to C4 olefins, C9+ aromatics and non-C9+ aromatics which comprises: 1) contacting a feed which contains methanol and/or dimethyl ether with a catalyst comprising a porous crystalline material, said contacting step being conducted in the presence of aromatics comprising C9 or C9+ aromatic compound produced in said process under conversion conditions including a temperature of 350° C. to 480° C. and a methanol partial pressure in excess of 10 psia (70 kPa), said porous crystalline material having a Diffusion Parameter for 2,2-dimethylbutane of about 0.1 sec−1 to about 20 sec−1 when measured at a temperature of 120° C.
    Type: Grant
    Filed: October 13, 2000
    Date of Patent: January 14, 2003
    Assignee: Exxon Mobil Chemical Patents, Inc.
    Inventors: Stephen H. Brown, Larry A. Green, Mark F. Mathias, David H. Olson, Robert A. Ware, William A. Weber, Reuel Shinnar
  • Patent number: 6504072
    Abstract: There is provided a process for the selective production of para-xylene which comprises reacting toluene with methanol in the presence of a catalyst comprising a porous crystalline material having a Diffusion Parameter for 2,2 dimethylbutane of about 0.1-15 sec−1 when measured at a temperature of 120° C. and a 2,2 dimethylbutane pressure of 60 torr (8 kPa). The porous crystalline material is preferably a medium-pore zeolite, particularly ZSM-5, which has been severely steamed at a temperature of at least 950° C. The porous crystalline material is preferably combined with at least one oxide modifier, preferably including phosphorus, to control reduction of the micropore volume of the material during the steaming step.
    Type: Grant
    Filed: May 8, 2002
    Date of Patent: January 7, 2003
    Assignee: ExxonMobil Oil Corporation
    Inventors: Stephen H. Brown, Mark F. Mathias, Robert A. Ware, David H. Olson
  • Publication number: 20030004383
    Abstract: There is provided a process for the selective production of para-xylene which comprises reacting toluene with methanol in the presence of a catalyst comprising a porous crystalline material having a Diffusion Parameter for 2,2 dimethylbutane of about 0.1-15 sec−1 when measured at a temperature of 120° C. and a 2,2 dimethylbutane pressure of 60 torr (8 kPa). The porous crystalline material is preferably a medium-pore zeolite, particularly ZSM-5, which has been severely steamed at a temperature of at least 950° C. The porous crystalline material is preferably combined with at least one oxide modifier, preferably including phosphorus, to control reduction of the micropore volume of the material during the steaming step.
    Type: Application
    Filed: May 8, 2002
    Publication date: January 2, 2003
    Inventors: Stephen H. Brown, Mark F. Mathias, Robert A. Ware, David H. Olson
  • Patent number: 6423879
    Abstract: There is provided a process for the selective production of para-xylene which comprises reacting toluene with methanol in the presence of a catalyst comprising a porous crystalline material having a Diffusion Parameter for 2,2 dimethylbutane of about 0.1-15 sec−1 when measured at a temperature of 120° C. and a 2,2 dimethylbutane pressure of 60 torr (8 kPa). The porous crystalline material is preferably a medium-pore zeolite, particularly ZSM-5, which has been severely steamed at a temperature of at least 950° C. The porous crystalline material is preferably combined with at least one oxide modifier, preferably including phosphorus, to control reduction of the micropore volume of the material during the steaming step.
    Type: Grant
    Filed: November 15, 1999
    Date of Patent: July 23, 2002
    Assignee: ExxonMobil Oil Corporation
    Inventors: Stephen H. Brown, Mark F. Mathias, Robert A. Ware, David H. Olson
  • Publication number: 20010053868
    Abstract: A C4+naphtha hydrocarbon feed is converted to light olefins and aromatics, by contacting the feed with a catalyst containing ZSM-5 and/or ZSM-11, a substantially inert matrix material such as silica and/or clay, having less than about 20 wt % active matrix material based on total catalyst composition, and phosphorus.
    Type: Application
    Filed: July 12, 1999
    Publication date: December 20, 2001
    Inventors: ARTHUR W. CHESTER, KE LIU, ROBERT A. WARE
  • Patent number: 6222087
    Abstract: A hydrocarbon feed containing C4-C7 olefins and/or paraffins is converted to light olefins, by contacting the feed with a catalyst containing ZSM-5 and/or ZSM-11, having an initial silica to alumina ratio greater than about 300:1, and phosphorus.
    Type: Grant
    Filed: July 12, 1999
    Date of Patent: April 24, 2001
    Assignee: Mobil Oil Corporation
    Inventors: David L. Johnson, Khushrav E. Nariman, Robert A. Ware
  • Patent number: 5939597
    Abstract: Para-xylene is produced by toluene methylation by charging toluene and a methylating agent to a fluidized bed of catalyst at a rate sufficient to maintain the fluidized bed in a turbulent sub-transport flow regime, reacting the toluene with the methylating agent, and recovering para-xylene from the fluidized bed. The fluidizable catalyst is a microporous material having a Constraint Index of about 1 to about 12. The relative concentration of the catalyst particles having a major dimension of less than 40 microns is controlled at between about 5 and 35 weight percent. The catalyst particles have an apparent particle density of about 0.9 to 1.6 grams per cubic centimeter, a size range of about 1 to 150 microns, and average particle size of about 20 to 100 microns.
    Type: Grant
    Filed: October 21, 1997
    Date of Patent: August 17, 1999
    Assignee: Mobil Oil Corporation
    Inventors: Ralph M. Dessau, David H. Olson, Robert A. Ware, Sadi Mizrahi
  • Patent number: 5625113
    Abstract: A process is disclosed for alkylating an isoparaffin with an olefin comprising the steps of:(a) reacting an isoparaffin having from 4 to 8 carbon atoms with an olefin having from 2 to 12 carbon atoms in a first alkylation reaction stage at temperature from about -40.degree. C. to about 500.degree. C. and overall isoparaffin:olefin feed weight ratio of from about 1:1 to about 250:1 with a solid alkylation catalyst comprising a synthetic porous crystalline material characterized by an X-ray diffraction pattern including values substantially as set forth in Table I of the specification and having a composition comprising the molar relationshipX.sub.2 O.sub.3 :(n)YO.sub.
    Type: Grant
    Filed: December 28, 1994
    Date of Patent: April 29, 1997
    Assignee: Mobil Oil Corporation
    Inventors: Mohsen N. Harandi, James H. Beech, Jr., Albin Huss, Jr., Robert A. Ware, Altaf Husain
  • Patent number: 5620590
    Abstract: There is provided a process and a catalyst for hydrocracking hydrocarbons, such as gas oils. The catalyst comprises a hydrogenating metal and small crystal size zeolite Y. The zeolite Y may have a crystal size of less than one micron. Examples of hydrogenating metals include nickel and tungsten.
    Type: Grant
    Filed: April 29, 1994
    Date of Patent: April 15, 1997
    Assignee: Mobil Oil Corporation
    Inventors: Robert P. L. Absil, James R. Katzer, Daria N. Lissy, Robert A. Ware, Stephen S. Wong
  • Patent number: 5500109
    Abstract: There is provided a method for preparing an alumina bound, zeolite catalyst, wherein a zeolite of low silanol content is used as the source of zeolite used to prepare the catalyst. A particular zeolite used in this catalyst is zeolite Y. This catalyst may be combined with at least one hydrogenation component and used to hydrocrack hydrocarbons, such as gas oils. In particular, an NiW/USY/alumina catalyst may be used in a hydrocracking reaction to produce distillate boiling range hydrocarbons from higher boiling hydrocarbons.
    Type: Grant
    Filed: October 17, 1994
    Date of Patent: March 19, 1996
    Assignee: Mobil Oil Corp.
    Inventors: Kathleen M. Keville, Hye K. C. Timken, Robert A. Ware
  • Patent number: 5491270
    Abstract: A benzene-rich gasoline stream is alkylated with higher olefins in contact with a fluid bed of shape selective zeolite catalyst to produce a gasoline product stream reduced in benzene content wherein the high octane value alkylaromatics formed by benzene alkylation are of low carbon number, essentially C10-. Concurrently, a portion of olefins in the gasoline stream are converted to gasoline boiling range hydrocarbons and the sulfur content of the gasoline feedstream is lowered. Besides enhancing the octane value of the feedstream, the process results in a lower Reid vapor pressure and lower sulfur content.
    Type: Grant
    Filed: July 22, 1994
    Date of Patent: February 13, 1996
    Assignee: Mobil Oil Corporation
    Inventors: Arthur A. Chin, Nick A. Collins, Mohsen N. Harandi, Robert T. Thomson, Robert A. Ware
  • Patent number: 5420360
    Abstract: A process is disclosed for producing alkyl tertiary alkyl ether such as TAME from alkanol and hydrocarbon feedstock containing linear olefins, iso-olefins, linear alkanes and iso-alkanes such as C5 streams from FCC. The process selectively etherifies iso-olefins in a plural stage etherification zone whose linear olefin-containing effluent is treated by distillation to remove iso-alkanes, and alkanol before passing to a skeletal isomerization zone using constrained intermediate pore size zeolite catalyst such as ZSM-22, ZSM-23, or ZSM-35, which converts linear olefins to iso-olefins which are cycled for etherification. The use of distillation to remove iso-alkanes and alkanol reduces mass flow to the etherification process and minimizes skeletal isomerization catalyst poisoning by alkanol, without resort to water extraction processes which require subsequent treatment of the isomerization zone feed to remove water.
    Type: Grant
    Filed: August 27, 1993
    Date of Patent: May 30, 1995
    Assignee: Mobil Oil Corporation
    Inventors: Arthur A. Chin, Roland B. Saeger, James A. Stoos, Robert A. Ware
  • Patent number: 5414172
    Abstract: A process for upgrading low octane naphthas to produce gasoline products with low levels of benzene and aromatics while retaining a high pool octane uses a paraffinic naphtha reformer feed which is dehexanized to provide a C.sub.7 + fraction which is fed to the reformer and a C.sub.6 fraction which is fed together with the C.sub.6 fraction from the reformer effluent to a catalytic upgrading step where the low octane components from the naphtha and the benzene from the reformate are converted to a low benzene, high octane gasoline by alkylation of the benzene and other aromatics present in the reformate. The process has the advantage that benzene make in the reformer is reduced by the partial by-passing of the C.sub.6 benzene precursors around the reformer; in addition, improved benzene alkylation results from the presence of additional light olefins generated by the cracking of paraffins from the paraffinic naphtha. the reaction is preferably carried out in a turbulent fluidized bed reaction zone.
    Type: Grant
    Filed: January 21, 1994
    Date of Patent: May 9, 1995
    Assignee: Mobil Oil Corporation
    Inventors: Arthur A. Chin, Nick A. Collins, Mohsen N. Harandi, Robert T. Thomson, Robert A. Ware
  • Patent number: 5405814
    Abstract: An olefin hydration catalyst is regenerated with a non-oxidizing light gas, such as hydrogen. Light olefins, especially propylene, are converted to a mixture of alcohol(s), such as isopropanol (IPA) and ether(s), such as diisopropylether (DIPE) by contacting a feed containing the olefin with water and/or alcohol with the olefin hydration catalyst. Regeneration conditions include temperatures of from about 150.degree. C. to about 550.degree. C., pressures below about 1000 psig (6900 kPa). Lower pressures of regeneration unexpectedly demonstrated more effective catalyst regeneration through greater coke removal.
    Type: Grant
    Filed: June 7, 1993
    Date of Patent: April 11, 1995
    Assignee: Mobil Oil Corporation
    Inventors: James H. Beech, Jr., Weldon K. Bell, W. Thomas Mo, Hye Kyung C. Timken, Robert A. Ware
  • Patent number: 5401704
    Abstract: There is provided a process and a catalyst for hydrocracking hydrocarbons, such as gas oils. The catalyst comprises a hydrogenating metal and small crystal size zeolite Y. The zeolite Y may have a crystal size of less than one micron. Examples of hydrogenating metals include nickel and tungsten.
    Type: Grant
    Filed: December 22, 1993
    Date of Patent: March 28, 1995
    Assignee: Mobil Oil Corporation
    Inventors: Robert P. L. Absil, James R. Katzer, Daria N. Lissy, Robert A. Ware, Stephen S. Wong