Patents Assigned to Exxon Research and Engineering Company
  • Patent number: 6835301
    Abstract: A process for hydroprocessing a hydrotreated liquid distillate stream to produce a stream exceptionally low in sulfur as well as aromatics. A hydrotreated distillate stream is further hydrotreated in a co-current reaction zone wherein the reaction product is passed to a separation drum wherein a vapor product is collected overhead and a liquid product is passed to a aromatics saturation zone countercurrent to the flow of hydrogen treat gas.
    Type: Grant
    Filed: December 7, 1999
    Date of Patent: December 28, 2004
    Assignee: Exxon Research and Engineering Company
    Inventors: Edward S. Ellis, Henry Jung, William E. Lewis
  • Publication number: 20040151643
    Abstract: The present invention comprises a mixing system that provides improved mixing of quench gas and process fluids in a height constrained interbed space while not increasing pressure drop. In particular, the device improves the effectiveness of an existing mixing volume in mixing the gas phase of two-phase systems. The mixing system includes a horizontal collection tray, a mixing chamber positioned below the collection tray, at least one passageway extending through the collection tray into the mixing chamber, and a vapor slipstream passageway extending through the collection tray into the mixing chamber for directing a vapor slipstream from above the collection tray into the mixing chamber. The mixing chamber and the collection tray define a two-phase mixing volume. The passageway conducts fluid containing at least some vapor from above the collection tray into the mixing chamber. The mixing chamber preferably includes at least one outlet opening for the downward passage of fluid.
    Type: Application
    Filed: February 5, 2003
    Publication date: August 5, 2004
    Applicant: ExxonMobil Research and Engineering Company (formerly Exxon Research and Engineering Company)
    Inventors: Neil K. McDougald, Sherri L. Boyd, Gregory P. Muldowney
  • Patent number: 6620312
    Abstract: A method for producing a lube basestock from a waxy feed is disclosed in which a feed containing to 50 wt % or more of wax is hydrotreated and stripped to lower the nitrogen and sulfur content of the feed. The feed is then hydroisomerized under conditions to 370° C. hydrocatalytically dewaxed with a catalyst comprising a mixture of a catalytically active metal on a zeolite dewaxing catalyst and an amorphous catalyst, or alternatively is solvent dewaxed and then hydrocatalytically dewaxed with the just described catalyst.
    Type: Grant
    Filed: October 25, 2000
    Date of Patent: September 16, 2003
    Assignee: Exxon Research and Engineering Company
    Inventors: William John Murphy, Ian Alfred Cody, Bernard George Silbernagel
  • Patent number: 6495029
    Abstract: A process for the hydrodesulfurization (HDS) of the multiple condensed ring heterocyclic organosulfur compounds present in petroleum and chemical streams. The stream is passed through at least one reaction zone countercurrent to the flow of a hydrogen-containing treat gas, and through at least one sorbent zone. The reaction zone contains a bed of Group VIII metal-containing hydrodesulfurization catalyst and the sorbent zone contains a bed of hydrogen sulfide sorbent material.
    Type: Grant
    Filed: August 27, 1999
    Date of Patent: December 17, 2002
    Assignee: Exxon Research and Engineering Company
    Inventors: James J. Schorfheide, Edward S. Ellis, Michele S. Touvelle, Ramesh Gupta
  • Patent number: 6458855
    Abstract: Stable hydrocarbon in water emulsions are formed by emulsifying the hydrocarbon with a non-ionic surfactant and water obtained from the Fischer-Tropsch process.
    Type: Grant
    Filed: January 22, 1999
    Date of Patent: October 1, 2002
    Assignee: Exxon Research and Engineering Company
    Inventors: Robert J. Wittenbrink, Paul J. Berlowitz, Tapan Chakrabaty, Loren L. Ansell
  • Patent number: 6383366
    Abstract: Waxy feeds are treated under hydroisomerization conditions to produce good yields of an isomerate product of high VI by using a silica-alumina based catalyst in which the silica-alumina has a pore volume less of 0.99 ml/gm (H2O), an alumina content in the range of 35 to 55 wt % and an isoelectric point in the range of 4.5 to 6.5. A lube fraction of the isomerate is dewaxed to provide a lube basestock of high VI. The silica-alumina may be modified with a rare earth oxide or yttria or boria or magnesia in which instance the modified catalyst has an isoelectric point greater than but no more than 2 points greater than base the silica-alumina.
    Type: Grant
    Filed: November 14, 2000
    Date of Patent: May 7, 2002
    Assignee: Exxon Research and Engineering Company
    Inventors: Kenneth Lloyd Riley, William John Murphy, Ian Alfred Cody, Stuart Leon Soled, Gary Brice McVicker, Sabato Miseo
  • Patent number: 6355850
    Abstract: Electrical oils having improved uninhibited oxidation and electrical resistance are derived by blending a substantially nitrogen and sulfur free paraffinic or naphthenic base oil with a hydrofined light gas oil having a sulfur to nitrogen weight ratio of greater than 100:1 wherein the hydrofined light gas oil is added to the base oil in an amount sufficient to provide a blend having greater than about 0.03 wt % sulfur.
    Type: Grant
    Filed: January 18, 2000
    Date of Patent: March 12, 2002
    Assignee: Exxon Research and Engineering Company
    Inventors: Jacob Ben Angelo, Thomas Lynn Bays
  • Patent number: 6352639
    Abstract: An atomizing gas, such as steam, and a hot fluid comprising a hot liquid to be atomized, are passed under pressure, through separate fluid conduits in a heat exchange means, in which the hot liquid heats the steam to a superheat temperature, by indirect heat exchange. The superheated steam is then injected into the hot fluid, which comprises a two-phase fluid comprising steam and the hot liquid, subsequent to the superheated steam injection. The two-phase fluid is passed through an atomizing means, such as an orifice, into a lower pressure atomizing zone, which causes the steam to expand and atomize the liquid into a spray of liquid droplets. The two-phase fluid is formed before or as a consequence of the superheated steam injection and is preferably steam-continuous when passed through the atomizing means. This process is useful for atomizing a hot feed oil for a fluid cat cracking (FCC) process.
    Type: Grant
    Filed: December 13, 2000
    Date of Patent: March 5, 2002
    Assignee: Exxon Research and Engineering Company
    Inventors: Jackson I. Ito, Leonard Schoenman, Dean C. Draemel, Teh C. Ho, George A. Swan
  • Patent number: 6352638
    Abstract: A two-stage process for converting petroleum residua and other low value oils to high valued gasoline blendstocks and light olefins. The first stage is comprised of a thermal process unit containing a reaction zone comprised of a horizontal moving bed of fluidized hot particles operated at temperatures from about 500 to 600° C. and having a short vapor residence time, and the second stage is comprised of a catalytic conversion zone operated at a temperature of about 525° C. to about 650° C., and also having a short vapor residence time, preferably shorter than that of the first stage reaction zone.
    Type: Grant
    Filed: December 13, 2000
    Date of Patent: March 5, 2002
    Assignee: Exxon Research and Engineering Company
    Inventors: Mitchell Jacobson, Willibald Serrand
  • Patent number: 6344490
    Abstract: A removable filter for separating and filtering slurry liquid from solid particles includes one or more filter sections connected by a filtrate conduit. Each section comprises a plurality of vertical, hollow, sintered metal filter elements horizontally arranged across a manifold connected to a hollow filtrate conduit. The sections are vertically stacked and connected by the conduit(s) to form the filter which is removably secured in the slurry by means which permit it to be removed vertically up and out of the top of the reactor. This filter has a high surface area to volume ratio and is useful for removing the liquid hydrocarbon products from a slurry hydrocarbon synthesis reactor and can easily be replaced without having to drain out the slurry.
    Type: Grant
    Filed: January 22, 1999
    Date of Patent: February 5, 2002
    Assignee: Exxon Research and Engineering Company
    Inventors: Charles W. DeGeorge, Barry J. Thompson
  • Patent number: 6331575
    Abstract: A process for the preparation of a catalyst useful for conducting carbon monoxide conversion reactions, especially a Fischer-Tropsch catalyst, use of the catalyst for conducting such reactions, especially Fischer-Tropsch reactions, and the composition produced by said process. In the preparation of the catalyst, a solution of a polyol is employed to impregnate and disperse a compound or salt of a catalytic metal, or metals, e.g., copper or an Iron Group metal such as iron, cobalt, or nickel, or in a preferred embodiment both a compound or salt of rhenium and a compound or salt of a catalytic metal, or metals, e.g., copper or an Iron Group metal such as iron, cobalt, or nickel onto a refractory inorganic oxide support, e.g., titania. The rhenium, when present only in small amount permits full and complete reduction of the catalytic metal, or metals, dispersed by the polyol.
    Type: Grant
    Filed: September 15, 1998
    Date of Patent: December 18, 2001
    Assignee: Exxon Research and Engineering Company
    Inventor: Charles H. Mauldin
  • Patent number: 6325833
    Abstract: Emulsion blends are provided containing Fischer-Tropsch hydrocarbons, non-Fischer-Tropsch hydrocarbons, water, and a surfactant.
    Type: Grant
    Filed: September 12, 1997
    Date of Patent: December 4, 2001
    Assignee: Exxon Research and Engineering Company
    Inventors: Paul J. Berlowitz, Robert J. Wittenbrink
  • Patent number: 6319960
    Abstract: A method for hydrocarbon synthesis reactions from carbon monoxide and hydrogen using a catalyst pellet which includes a solid core and a coated layer of porous support impregnated with a catalyst which optimizes the CO conversion.
    Type: Grant
    Filed: November 6, 1987
    Date of Patent: November 20, 2001
    Assignee: Exxon Research & Engineering Company
    Inventors: William C. Behrmann, Kym B. Arcuri, Charles H. Mauldin, Mordechay Herskowitz
  • Patent number: 6315920
    Abstract: An electrical oil having reduced gassing tendency includes a major amount of a paraffinic or naphthenic basestock and a blend of certain hindered phenols, especially a blend of 2,6-di-t-butyl phenol and 2,6-di-t-butyl cresol. A further enhanced gassing tendency can be provided to the electrical oil by including a tolyltriazole derivative.
    Type: Grant
    Filed: September 10, 1999
    Date of Patent: November 13, 2001
    Assignee: Exxon Research and Engineering Company
    Inventors: Christopher Jeffrey Still Kent, Jacob B. Angelo
  • Patent number: 6309432
    Abstract: Clean distillate useful as a jet fuel or jet blending stock is produced from Fischer-Tropsch wax by separating wax into heavier and lighter fractions; further separating the lighter fraction and hydroisomerizing the heavier fraction and that portion of the light fraction above about 475° F. The isomerized product is blended with the untreated portion of the lighter fraction to produce high quality, clean, jet fuel.
    Type: Grant
    Filed: June 16, 1998
    Date of Patent: October 30, 2001
    Assignee: Exxon Research and Engineering Company
    Inventors: Robert J. Wittenbrink, Paul J Berlowitz, Bruce R. Cook
  • Patent number: 6303019
    Abstract: The present invention is a process to reduce the fouling of equipment for processing petroleum feedstreams. The steps of the process include mixing the feedstream with an aqueous electrolyte forming an oil-in-water dispersion, passing the dispersion through an electrochemical cell, passing a low voltage current through the dispersion, and separating the phases of the dispersion. The oil phase can then be further processed with minimum fouling of the equipment. The water phase is recycled for dispersing fresh petroleum.
    Type: Grant
    Filed: April 18, 2000
    Date of Patent: October 16, 2001
    Assignee: Exxon Research and Engineering Company
    Inventors: Michael Siskin, Mark A. Greaney, Glen E. Phillips
  • Patent number: 6303548
    Abstract: A base oil for an SAE 0W-40 lubricant composition comprises a mineral basestock, a polyalpha olefin and synthetic ester lubricant. The SAE 0W-40 lubricant comprises the base oil and a mixture of polymethacylate and olefin copolymer or hydrogenated diene VI improvers.
    Type: Grant
    Filed: March 12, 1999
    Date of Patent: October 16, 2001
    Assignee: Exxon Research and Engineering Company
    Inventor: Jason Z. Gao
  • Patent number: 6299760
    Abstract: A hydrodenitrogenation catalyst is prepared by decomposing a nickel (ammonium) molybdotungstate precursor and sulfiding, either pre-use or in situ, the decomposition product.
    Type: Grant
    Filed: March 3, 2000
    Date of Patent: October 9, 2001
    Assignee: Exxon Research and Engineering Company
    Inventors: Stuart L Soled, Sabato Miseo, Roman Krycak, Hilda Vroman, Teh C. Ho, Kenneth L. Riley
  • Patent number: RE37515
    Abstract: A cobalt- or ruthenium-containing hydrocarbon synthesis catalyst, subjected to short term, reversible, partial deactivation in a slurry synthesis process can be rejuvenated, i.e., at least about 80+% catalyst activity recovery, by treating the catalyst in the presence of liquid hydrocarbons, preferably the slurry hydrocarbons, with hydrogen at elevated temperatures and pressures.
    Type: Grant
    Filed: August 13, 1998
    Date of Patent: January 15, 2002
    Assignee: Exxon Research and Engineering Company
    Inventor: Willard N. Mitchell
  • Patent number: RE37649
    Abstract: Catalyst in a slurry phase reactor is rejuvenated and uniformly distributed in said reactor using a substantially vertical draft tube fully immersed in the slurry which utilizes a rejuvenating gas injected substantially near the bottom of the substantially vertical draft tube whereby catalyst near the bottom of the slurry phase reactor is drawn up the draft tube and discharged from the top of the draft tube near the top of the slurry phase in said reactor.
    Type: Grant
    Filed: August 13, 1998
    Date of Patent: April 9, 2002
    Assignee: Exxon Research and Engineering Company
    Inventors: Larry E. Pedrick, Charles H. Mauldin, William C. Behrmann