Patents Assigned to Exxon Research & Engineering
  • Patent number: 6258255
    Abstract: The invention relates to a method for making an asphalt product having an enhanced flash point and lower volatility, comprising vacuum distilling a blend of a high boiling petroleum fraction having an initial boiling point of at least 270° C. and a crude to produce a product asphalt having a flash of from 265° C. to 300° C.
    Type: Grant
    Filed: October 29, 1999
    Date of Patent: July 10, 2001
    Assignee: Exxon Research and Engineering Company
    Inventors: Mary Josephine Gale, Lyle Edwin Moran, James David Bell, Biddanda Umesh Achia
  • Patent number: 6251305
    Abstract: The present invention relates to a process for reducing the acidity of a petroleum oil containing organic acids comprising treating said petroleum oil containing organic acids with an effective amount of an alcohol at a temperature and under conditions sufficient to form the corresponding ester of said alcohol.
    Type: Grant
    Filed: October 6, 1998
    Date of Patent: June 26, 2001
    Assignee: Exxon Research and Engineering Company
    Inventors: Guido Sartori, David W. Savage, David C. Dalrymple, Bruce H. Ballinger, Saul C. Blum, William E. Wales
  • Patent number: 6245221
    Abstract: A process for the hydrodesulfurization (HDS) of multiple condensed ring heterocyclic organosulfur compounds present in petroleum and petrochemical streams over noble metal-containing catalysts under relatively mild conditions. The noble metal is selected from Pt, Pd, Ir, Rh, and polymetallics thereof. The catalyst system also contains a hydrogen sulfide sorbent material.
    Type: Grant
    Filed: June 7, 1999
    Date of Patent: June 12, 2001
    Assignee: Exxon Research and Engineering Company
    Inventors: William C. Baird, Jr., Gary B. McVicker, James J. Schorfheide, Darryl P. Klein, Sylvain S. Hantzer, Michel Daage, Michele S. Touvelle, Edward S. Ellis, David E. W. Vaughan, Jingguang Chen
  • Patent number: 6245709
    Abstract: Nickel-copper catalysts supported on an amorphous silica-alumina acidic carrier, preferably containing a binder, and having an iso-electric point of ≧6.5 are used to hydroisomerize paraffins, particularly Fischer-Tropsch paraffins, boiling at 350° F.+ into lighter, more valuable products.
    Type: Grant
    Filed: August 22, 1997
    Date of Patent: June 12, 2001
    Assignee: Exxon Research and Engineering Company
    Inventors: Janet R. Clark, Robert J. Wittenbrink, Stephen M. Davis, Kenneth L. Riley
  • Patent number: 6245222
    Abstract: The invention relates to a process for enhancing demetallation of metals containing hydrocarbonaceous feedstocks by contacting a metals containing hydrocarbonaceous feedstock at a sufficient temperature and pressure with an additive containing a polyoxyalkylene moiety said additive having preferential insolubility in alkane deasphalting solvent to produce an additive treated feedstock; and then contacting the resulting product with an effective deasphalting solvent to produce a deasphalted oil having a decreased metals content and an insoluble metals containing phase.
    Type: Grant
    Filed: October 23, 1998
    Date of Patent: June 12, 2001
    Assignee: Exxon Research and Engineering Company
    Inventors: Ramesh Varadaraj, William Edward Wales
  • Patent number: 6241952
    Abstract: A reactor for reacting liquid petroleum or chemical streams wherein the liquid stream flows countercurrent to the flow of a treat gas, such as a hydrogen-containing gas. The reactor is comprised of at least one vertically disposed reaction zone, each containing a bed of catalyst, wherein each reaction zone may contain vapor bypass means, and wherein each reaction zone is immediately preceded by a non-reaction zone, and wherein each non-reaction zone contains a gas/liquid contacting zone for stripping gaseous by-products, such as NH3 and H2S, from the liquid stream.
    Type: Grant
    Filed: August 12, 1999
    Date of Patent: June 5, 2001
    Assignee: Exxon Research and Engineering Company
    Inventors: Edward S. Ellis, Ramesh Gupta
  • Patent number: 6240971
    Abstract: Composite fiber reinforced structures, such as pipes or storage tanks, having improved resistance to microcracking and delamination and improved containment strength are disclosed. The walls of the structures comprise at least one layer comprising a plurality of continuous reinforcing glass fibers having an average diameter of ≦about 10 microns impregnated in a resinous binder such as a thermoset epoxy resin.
    Type: Grant
    Filed: October 1, 1999
    Date of Patent: June 5, 2001
    Assignee: Exxon Research and Engineering Company
    Inventors: Liza M. Monette, Michael P. Anderson, Russell R. Mueller, Cary N. Marzinsky, Allen S. Chiu
  • Patent number: 6238550
    Abstract: Disclosed are silicoaluminophosphates (SAPOs) having unique silicon distributions, a method for their preparation and their use as catalysts for the hydroprocessing of hydrocarbon feedstocks. More particularly, the new SAPOs have a high silica:alumina ratio, and may be prepared from single phase synthesis solutions or from microemulsions containing surfactants.
    Type: Grant
    Filed: May 20, 1999
    Date of Patent: May 29, 2001
    Assignee: Exxon Research and Engineering Company
    Inventors: Karl G. Strohmaier, David E. W. Vaughan, William J. Murphy, Ian A. Cody, Sandra J. Linek
  • Patent number: 6239082
    Abstract: Petroleum quench oils effective for high speed cooling of heated metals and metal hardening are disclosed. The petroleum quench oils contain natural or synthetic base oils having a minimum flash point of about 120° C. and a combination of poly(iso)alkylene and poly(iso)alkylene succinic anhydride or succinic acid. A method for cooling heated metal to harden it, improve the metallurgical consistency, improve machinability and reduce residue on quenched metal parts is also disclosed comprising quenching the heated metal part in a quench oil containing natural or synthetic base oils having a minimum flash point of about 120° C. and a combination of poly(iso)alkylene and poly(iso)alkylene succinic anhydride or succinic acid.
    Type: Grant
    Filed: April 3, 1998
    Date of Patent: May 29, 2001
    Assignee: Exxon Research and Engineering Company
    Inventors: William Donald Hewson, Gerald Keith Gerow
  • Patent number: 6239085
    Abstract: A grease of enhanced thermal stability and improved soap utilization comprises a major amount of a base oil comprising polyalphaolefin, alkyl aromatic synthetic fluid and white oil and a minor amount of soap thickener.
    Type: Grant
    Filed: October 23, 1998
    Date of Patent: May 29, 2001
    Assignee: Exxon Research and Engineering Company
    Inventor: David Anthony Slack
  • Patent number: 6235687
    Abstract: Lubricating oils exhibiting anti rust properties are obtained by adding to the lubricating oil an acidic anti rust additive and an acid scavenger such as carbodiimide, in a specific sequence.
    Type: Grant
    Filed: September 21, 1999
    Date of Patent: May 22, 2001
    Assignee: Exxon Research and Engineering Company
    Inventors: Todd Timothy Nadasdi, William Nelson Hayter
  • Patent number: 6231753
    Abstract: Selective and deep desulfurization of a high sulfur content mogas naphtha, with reduced product mercaptans and olefin loss, is achieved by a two stage, vapor phase hydrodesulfurization process with interstage separation of at least 80 vol. % of the H2S formed in the first stage from the first stage, partially desulfurized naphtha vapor effluent fed into the second stage. At least 70 wt. % of the sulfur is removed in the first stage and at least 80 wt. % of the remaining sulfur is removed in the second stage, to achieve a total at least 95 wt. % feed desulfurization, with no more than a 60 vol. % feed olefin loss. The second stage temperature and space velocity are preferably greater than in the first. The hydrodesulfurization catalyst preferably contains a low metal loading of Co and Mo metal catalytic components on an alumina support.
    Type: Grant
    Filed: November 24, 1999
    Date of Patent: May 15, 2001
    Assignee: Exxon Research and Engineering Company
    Inventors: Craig A. McKnight, Thomas R. Halbert, John P. Greeley, Garland B. Brignac, Richard A. Demmin, William E. Winter, Jr., Bruce R. Cook
  • Patent number: 6232279
    Abstract: Lubricant compositions suitable for use in automotive engines, especially internal combustion engines, the lubricant having a kinematic viscosity at 100° C. of less than 12.5 mm2/s and a high temperature, high shear dynamic viscosity (i.e. at a temperature of 150° C. and a shear rate of 106/s) of at least 2.9 mPa.s, and comprising (a) 70 to 99.5 wt. % of a base oil, preferably a mixture of poly-alpha-olefin and ester, having a kinematic viscosity at 100° C. of 2 to 8 mm2/s and a viscosity index of at least 120, and (b) 0.5 to 3 wt. % of an alkenylarene-conjugated diene copolymer, preferably styrene/butadiene copolymer, as a viscosity index improver. The lubricant provides an improvement in fuel economy performance whilst maintaining effective lubrication of the engine under operating conditions.
    Type: Grant
    Filed: June 25, 1999
    Date of Patent: May 15, 2001
    Assignee: Exxon Research and Engineering Company
    Inventor: Edgar Andreas Steigerwald
  • Patent number: 6231754
    Abstract: A high temperature naphtha desulfurization process with reduced olefin saturation employs a partially spent and low metals content hydrodesulfurization catalyst having from 2-40% the activity of a new catalyst. The catalytic metals preferably include Co and Mo in an atomic ratio of from 0.1 to 1. The catalyst is preferably at least partially regenerable, has less than 500 wppm of a total of one or more of nickel, iron and vanadium and preferably has no more than 12 wt. % catalytic metal calculated as the oxide. This permits selective deep desulfurization, with reduced olefin saturation, low product mercaptan levels and little or need for downstream mercaptan removal.
    Type: Grant
    Filed: December 6, 1999
    Date of Patent: May 15, 2001
    Assignee: Exxon Research and Engineering Company
    Inventors: Garland B. Brignac, John P. Greeley, Thomas R. Halbert, Craig A. McKnight, Richard A. Demmin, Janet R. Clark
  • Patent number: 6228239
    Abstract: In one embodiment, the invention is related to a process for desalting crude oil that requires less wash water than conventional desalting methods. In the preferred embodiment of the invention, a chemical demulsifier formulation comprising an emulsion-breaking chemical and a solvent carrier is added to the crude oil. Wash water is then added to the crude oil until the volume of water in the oil ranges from about 0.1 to about 3 vol. %. Subsequently, the mixture of crude oil, wash water, and chemical demulsifier formulation is subjected to opposed-flow mixing. Chemical emulsion-breakers useful in the invention have a hydrophobic tail group and a hydrophilic head group. Preferably, the emulsion breaker has the formula: x ranges from 1 to 5, y ranges from 0 to 2, and R is an alkyl group having 4-9 carbon atoms, and n ranges from 3 to 9.
    Type: Grant
    Filed: February 26, 1999
    Date of Patent: May 8, 2001
    Assignee: Exxon Research and Engineering Company
    Inventors: Pacifico V. Manalastas, Ramesh Varadaraj, David W. Savage, Guido Sartori, Ramesh R. Hemrajani, Cornelius Hendrick Brons
  • Patent number: 6224770
    Abstract: The invention is a system and a method for bioremediating hydrocarbon-contaminated groundwater. The method comprises contacting the hydrocarbon-contaminated groundwater with a source of microbial nutrients and then aerating the nutriated water with air or oxygen, the aeration being conducted under substantially bubble-free conditions.
    Type: Grant
    Filed: March 19, 1999
    Date of Patent: May 1, 2001
    Assignee: Exxon Research and Engineering Company
    Inventors: David William Savage, Win-Sow Winston Ho, Peter Calcavecchio, Evelyn Nobles Drake
  • Patent number: 6224749
    Abstract: A three stage hydroprocessing process includes two liquid and one vapor reaction stages, both of which produce an effluent comprising liquid and vapor. Both vapor effluents comprise vaporized hydrocarbonaceous material. Fresh hydrogen is used for the hydroprocessing in both liquid stages. The second stage liquid effluent comprises the product liquid. The first stage liquid effluent is the feed for the second stage. The first stage vapor effluent is hydroprocessed in the vapor stage and then cooled to condense and recover at least a portion of the processed vapor as additional product liquid.
    Type: Grant
    Filed: May 6, 1998
    Date of Patent: May 1, 2001
    Assignee: Exxon Research and Engineering Company
    Inventors: Ramesh Gupta, Henry Jung, Edward S. Ellis, Gerald E. Markley
  • Patent number: 6225255
    Abstract: An additive catalyst for the cracking of heavy oil, characterized in that the additive catalyst includes: (i) a mixed metal oxide composed of an acidic metal oxide and a basic metal oxide, in which the proportion of the basic metal oxide is from 5 to 50 mole %, (ii) clay, and (iii) silica.
    Type: Grant
    Filed: June 8, 1998
    Date of Patent: May 1, 2001
    Assignee: Exxon Research and Engineering Company
    Inventors: Masato Shibasaki, Nobuo Ootake, Kaori Nakamura
  • Patent number: 6221240
    Abstract: A process for the hydrodesulfurization (HDS) of multiple condensed ring heterocyclic organosulfur compounds present in petroleum and petrochemical streams and the saturation of aromatics over noble metal-containing catalysts under relatively mild conditions. The noble metal is selected from Pt, Pd, Ir, Rh and polymetallics thereof. The catalyst system also contains a hydrogen sulfide sorbent material.
    Type: Grant
    Filed: June 7, 1999
    Date of Patent: April 24, 2001
    Assignee: Exxon Research and Engineering Company
    Inventors: Darryl P. Klein, Michele S. Touvelle, Edward S. Ellis, Carl W. Hudson, Sylvain Hantzer, Jingguang Chen, David E. W. Vaughan, Michel Daage, James J. Schorfheide, William C. Baird, Jr., Gary B. McVicker
  • Patent number: RE37229
    Abstract: The operation of a hydrocarbon synthesis reactor and catalyst distributed in the reaction slurry therein are improved by the presence in said reactor of one or more vertical downcomers open at both ends with gas disengaging areas located at their top end. The downcomer which circulates catalyst from the top of the reaction slurry to the bottom of said slurry is fully immersed in the reaction slurry and preferably extends from just above the bottom of the reaction zone of the reaction vessel to just below the top surface of the reaction slurry. The bottom end of said downcomer is shielded from intrusion of rising synthesis gas by the placement of a baffle which blocks rising gas entry but facilitates the exit of catalyst and liquid from the bottom of said downcomer and distributes them radially throughout the adjacent reactor slurry.
    Type: Grant
    Filed: August 13, 1998
    Date of Patent: June 12, 2001
    Assignee: Exxon Research and Engineering Company
    Inventors: William C. Behrmann, Charles H. Mauldin, Larry E. Pedrick