Patents Assigned to Exxon Research & Engineering
  • Patent number: 5637287
    Abstract: A process to make high silica faujasite family zeolites using preformed gels and templates derived from recycled mother liquors.
    Type: Grant
    Filed: February 2, 1996
    Date of Patent: June 10, 1997
    Assignee: Exxon Research & Engineering Company
    Inventors: David E. W. Vaughan, Karl G. Strohmaier
  • Patent number: 5637141
    Abstract: The present invention provides a method of making storage-stable road paving binders by blending a minor amount of an unsaturated polymer (e.g., having at least one diene monomer) with a major amount of asphalt at an elevated temperature such that the components are sufficiently fluid to blend; treating the asphalt-polymer blend with a sulfonating agent; and stripping the treated asphalt-polymer blend at an elevated temperature with sufficient stripping gas to remove strippable sulfur moieties and to stabilize the resulting stripped, treated blend. The invention also provides asphaltic compositions made by the method. The asphaltic compositions are useful as binders in road paving applications.
    Type: Grant
    Filed: June 18, 1996
    Date of Patent: June 10, 1997
    Assignee: Exxon Research & Engineering Company
    Inventors: Olga Puzic, Larry J. Evers, Kenneth E. Williamson, Martin L. Gorbaty, Nicholas C. Nahas, Alain L. Lenack
  • Patent number: 5635055
    Abstract: The yield and quality of products secured from cracking units is increased by the process of subjecting the product stream secured from such cracking unit to a selective aromatics removal process and recycling the recovered aromatics lean (saturates rich) stream to the cracking unit whereby such saturates rich stream is subjected to increased conversion to higher value desired products.
    Type: Grant
    Filed: July 19, 1994
    Date of Patent: June 3, 1997
    Assignee: Exxon Research & Engineering Company
    Inventors: James R. Sweet, Tan-Jen Chen, Charles P. Darnell
  • Patent number: 5632785
    Abstract: A method for reducing fuel consumption in an internal combustion engine comprises operating said engine on a fuel composition comprising a major amount of fuel and a minor amount of an additive comprising an ester of a polyhydric polyether having ether oxygens and free and esterified hydroxyl groups in the polyhydric polyether backbone. One such ester additive is decaglycerol tetraoleate, which is an ester of decaglycerol and oleic acid containing an average of four adducted oleic acid units and 10-12 free hydroxyl groups.
    Type: Grant
    Filed: December 1, 1995
    Date of Patent: May 27, 1997
    Assignee: Exxon Research & Engineering Company
    Inventor: Anne M. Culotta
  • Patent number: 5627226
    Abstract: A composite is provided having improved toughness without reduction in stiffness comprising a polymer matrix having fibers embedded therein wherein the polymer of the matrix is substantially beta polypropylene or a beta polypropylene-olefin copolymer. The composite is made by combining a nucleating agent with a polymer composition selected from the group consisting of alpha polypropylene, an alpha polypropylene-olefin copolymer, alpha polypropylene containing fibers therein and an alpha polypropylene-olefin copolymer having fibers therein, and when the polymer is polypropylene or polypropylene-olefin copolymer, also independently adding fiber to the polymer or copolymer and thereafter inducing nucleation whereby a composite of improved stiffness with no reduction in toughness is formed.
    Type: Grant
    Filed: November 3, 1995
    Date of Patent: May 6, 1997
    Assignee: Exxon Research & Engineering Company
    Inventors: Arnold Lustiger, Cary N. Marzinsky, Yann Devorest
  • Patent number: 5620591
    Abstract: A hydroconversion process for converting a heavy hydrocarbonaceous feedstock to lower boiling products, which process involves the use of a sulfided catalyst concentrate which is prepared in a continuous plug-flow mode. The heavy hydrocarbonaceous feedstock is reacted with said catalyst concentrate in the presence of hydrogen at hydroconversion conditions.
    Type: Grant
    Filed: December 22, 1994
    Date of Patent: April 15, 1997
    Assignee: Exxon Research & Engineering Company
    Inventors: Martin C. Poole, Thomas R. Halbert, Roby Bearden, Stephen D. Reynolds
  • Patent number: 5597474
    Abstract: The present invention relates to an integrated fluid coking/hydrogen production process. The fluid coking unit is comprised of a fluid coker reactor, a heater, and a gasifier. Solids from the fluidized beds are recycled between the coking zone and the heater and between the heater and the gasifier. A separate stream of hot solids from the gasifier is passed to the scrubbing zone of the reactor. Methane and steam are introduced into the stream of hot solids passing from the gasifier to the scrubbing zone. The hot particles act to catalyze the conversion of methane to carbon monoxide and hydrogen in the presence of steam.
    Type: Grant
    Filed: November 14, 1994
    Date of Patent: January 28, 1997
    Assignee: Exxon Research & Engineering Co.
    Inventors: Michael C. Kerby, Roby Bearden, Jr., Stephen M. Davis, LeRoy Clavenna
  • Patent number: 5503761
    Abstract: A synthetic ester base stock having reduced deposit formation which comprises the reaction product of technical pentaerythritol and a mixture of carboxylic acids. The mixture of carboxylic acids comprises (1) at least one C.sub.8 -C.sub.10 carboxylic acid having 6 or less reactive hydrogens, (2) at least one C.sub.5 -C.sub.7 carboxylic acid having 6 or less reactive hydrogens and (3) at least one C.sub.6 -C.sub.10 carboxylic acid having 6 or more reactive hydrogens.
    Type: Grant
    Filed: August 2, 1994
    Date of Patent: April 2, 1996
    Assignee: Exxon Research & Engineering Co./Hatco Corp.
    Inventors: Thomas L. Ashcraft, Jr., Paul J. Berlowitz, Max J. Wisotsky, Dale D. Carr, Thomas G. Schaefer
  • Patent number: 5503774
    Abstract: The present invention provides for enhanced bioremediation of hydrocarbon contaminated soils and waters by treating soil or water with a surfactant or mixture of surfactants having the general formulae: ##STR1## wherein A=CH.sub.2, B=CH.sub.2 CH.sub.2 O, x=1-10 and y=2-20.
    Type: Grant
    Filed: July 15, 1994
    Date of Patent: April 2, 1996
    Assignee: Exxon Research & Engineering Co.
    Inventors: Cornelius H. Brons, Jan Bock, Ramesh Varadaraj, Stanley J. Brois
  • Patent number: 5504262
    Abstract: The present invention relates to a method for making mixtures of ethanol and methanol by reacting methane, water and an acidic aqueous solution of a electron acceptor, preferably Fe.sub.2 (SO.sub.4).sub.3 or Fe(ClO.sub.4).sub.3, having a pH of less than 3, preferably 1 to 3, more preferably 1 to 2 in the presence of a noble metal catalyst, typically platinum or palladium, having a diameter of at least about 100 .ANG. at a temperature of at least 60.degree. C. to about 100.degree. C. The process is advantageous as it provides a method of making ethanol directly from methanol at low cost and high thermodynamic efficiency.
    Type: Grant
    Filed: December 23, 1994
    Date of Patent: April 2, 1996
    Assignee: Exxon Research & Engineering Co.
    Inventors: Thomas H. Vanderspurt, John J. Knarr, Anthony W. Ho
  • Patent number: 5498673
    Abstract: The present invention provides a functionalized styrenic polymer or copolymer which contains functionalized para-alkystryene moiety having the formula: ##STR1## wherein R.sub.1, R.sub.2, and R.sub.3 are independently selected from hydrogen, alkyl and primary and secondary halo alkyl, and R.sub.4 is selected from a group having the formula: ##STR2## wherein x is an integer of from 2 to about 10, y is an integer from ranging from 0 to about 20 and A is a linear hydrocarbyl group of from 2 to about 10 carbon atoms or a branched hydrocarbyl group of from 3 to about 10 carbon atoms.
    Type: Grant
    Filed: November 29, 1994
    Date of Patent: March 12, 1996
    Assignee: Exxon Research & Engineering Co.
    Inventor: Abhimanyu O. Patil
  • Patent number: 5498638
    Abstract: High conversion, substantially once-through hydrocarbon synthesis is achieved by reacting H.sub.2 and CO in a first stage(s) in the presence of a non-shifting catalysts, separating liquid products and reacting the remaining gas streams in the presence of hydrocarbon synthesis catalysts having shifting activity.
    Type: Grant
    Filed: April 29, 1994
    Date of Patent: March 12, 1996
    Assignee: Exxon Research & Engineering Co.
    Inventor: David C. Long
  • Patent number: 5486348
    Abstract: Binderless zeolite L particles are prepared by a method in which particles are formed from silica and from 0 to 95 wt % preformed zeolite L crystallites, and the particles are thereafter reacted with an alkaline solution comprising a source of alumina to convert the silica binder to zeolite L. These particles may comprise cylindrical zeolite L crystallites with a mean diameter of at least 0.05 micron in a zeolite L matrix and may be used as catalyst. Also acyclic hydrocarbons are dehydrocyclized and/or isomerized by contacting them at a temperature of from 370.degree. C. to 600.degree. C. with this catalyst incorporating at least one Group VIII metal having dehydrogenating activity to convert at least part of the acyclic hydrocarbons into aromatic hydrocarbons.
    Type: Grant
    Filed: October 12, 1994
    Date of Patent: January 23, 1996
    Assignee: Exxon Research & Engineering (ER&E)
    Inventors: Johannes P. Verduijn, Pieter E. Gellings
  • Patent number: 5486498
    Abstract: Zeolite L with flat basal planes, and reduced crystallite size is prepared in a synthesis modified by the addition of small amounts of additional metal such as magnesium, calcium, barium, cobalt, zinc, chromium, manganese or nickel. The addition of these metals also suppresses unwanted zeolite W formation even when the synthesis would otherwise form this zeolite.
    Type: Grant
    Filed: March 3, 1995
    Date of Patent: January 23, 1996
    Assignee: Exxon Research & Engineering Company
    Inventor: Johannes P. Verduijn
  • Patent number: 5476982
    Abstract: The present invention is directed to a novel catalyst composition and its use in the dehydrogenation of paraffins to olefins. The catalyst comprises an alloy of a Group VIII noble metal and a metal selected from the group consisting of zinc and gallium on a support selected from the group consisting of silica, zinc oxide modified silica and zinc oxide modified silica-pillared clays when said alloy is a zinc alloy, and silica, gallium oxide modified silica and gallium oxide modified silica-pillared clays when said alloy is a gallium alloy. The instant catalyst is an active and selective catalyst for the catalytic dehydrogenation of paraffins to olefins, especially gaseous paraffins, having the added benefit of retaining high activity and selectivity even following repeated regeneration by calcination in oxygen containing gas at temperatures of 450.degree. C. to 650.degree. C., preferably 450.degree. C. to 500.degree. C.
    Type: Grant
    Filed: June 14, 1994
    Date of Patent: December 19, 1995
    Assignee: Exxon Research & Engineering Co.
    Inventors: John L. Robbins, Elise Marucchi-Soos, Jack W. Johnson, John F. Brody
  • Patent number: 5470358
    Abstract: Aromatic amines of the formula ##STR1## where R.sub.1 is C.sub.1 -C.sub.10 alkyl or halogen and n is an integer from 0 to 3 are effective in increasing the motor octane number of aviation gasolines to 98 or greater without the presence of lead additives.
    Type: Grant
    Filed: April 19, 1994
    Date of Patent: November 28, 1995
    Assignee: Exxon Research & Engineering Co.
    Inventor: Roger G. Gaughan
  • Patent number: 5466364
    Abstract: The daylight stability, foaming characteristics, color, engine performance test behavior, oxygenates content, and thermal stability of wax isomerate oils and/or hydrocarbon synthesis liquid products are improved by the process of contacting the aforesaid wax isomerate oil and/or hydrocarbon synthesis liquid products with a silica adsorbent, said silica adsorbent being characterized by possessing a pore size of at least about 100 .ANG., preferably at least about 125 .ANG., most preferably at least about 150 .ANG., an alkali/alkaline earth ion concentration, excluding sodium, of greater than about 125 ppm, an iron content of less than about 40 ppm and a zirconium content of less than about 130 ppm.
    Type: Grant
    Filed: July 2, 1993
    Date of Patent: November 14, 1995
    Assignee: Exxon Research & Engineering Co.
    Inventors: Bal K. Kaul, Craig Y. Sabottke, Rocco A. Fiato, Edward Niessen
  • Patent number: 5466376
    Abstract: The presence of carryunder in the extract phase recovered from a solvent extraction tower is an indication of unsatisfactory performance. The continuous analysis of the extract phase using a turbidity analyzer to detect the presence of two phases, indicating carryunder permits corrective measures to be taken in tower operation to reduce or eliminate carryunder.
    Type: Grant
    Filed: April 29, 1994
    Date of Patent: November 14, 1995
    Assignee: Exxon Research & Engineering Co.
    Inventors: Joseph P. Boyle, Gordon C. Camano, Randall S. Lachine, Howard R. Lingley, Raymond W. Saunders
  • Patent number: 5464523
    Abstract: A method and a sensor to measure the sulfur activity in sulfur-containing environments are disclosed. The active component is a non-stoichiometric metal sulfide foil or film. In the case of a thin sulfide film, a ceramic substrate is employed for improved mechanical rigidity. The electrical conductivity of the sulfide is related to the sulfur activity of the process stream to which it is exposed.
    Type: Grant
    Filed: May 18, 1994
    Date of Patent: November 7, 1995
    Assignee: Exxon Research & Engineering Co.
    Inventors: Trikur A. Ramanarayanan, Vinod K. Pareek, James D. Mumford, III, Horst Witzke
  • Patent number: 5462680
    Abstract: This invention relates to novel compositions of matter comprising free radical adducts of a fullerene with one or more saturated hydrocarbons having a number average molecular weight ranging from about 200 to about ten million. Attachment of saturated hydrocarbons to as many as fourteen sites on the fullerene surface can be achieved via free radical initiated reactions. Fullerenes also add to saturated hydrocarbons with functional groups selected from the group consisting of hydroxy, carboxy, and carboalkoxy radicals in the presence of a free radical initiator. Said radical adducts of substantially saturated hydrocarbons with fullerenes react further with alkylamines and polyamines to produce new compositions. The radical adducts, and their aminated derivatives are useful as dispersants and viscosity modifiers in lubricants.
    Type: Grant
    Filed: April 19, 1994
    Date of Patent: October 31, 1995
    Assignee: Exxon Research & Engineering Co.
    Inventors: Stanley J. Brois, Abhimanyu O. Patil, Wolfgang W. Schulz, Chang S. Hsu, Richard T. Garner