Patents Assigned to Exxon Research and Engineering Company
  • Patent number: 5569404
    Abstract: The present invention provides for the use of certain oil soluble iodides to enhance the oxidation resistance of lubricating oils and fuels, and for the novel formulated compositions containing these iodides. Oil soluble iodides such as C.sub.16 to C.sub.78 alkyl ammonium as well as oil solubilizable or dispersible iodides such as CoI.sub.2, CuI, KI and NaI in combination with a suitable dispersing agent may be used. Typically a minor amount of additive, from about 40 to about 1000 ppm is used. The additive is effective as an antioxidant in a variety of different types of base and formulated oils.
    Type: Grant
    Filed: February 17, 1995
    Date of Patent: October 29, 1996
    Assignee: Exxon Research and Engineering Company
    Inventors: Manuel A. Francisco, Kenneth D. Rose
  • Patent number: 5565086
    Abstract: The present invention is directed to an improved isomerization process employing a catalyst wherein the catalyst comprises a pair of catalyst particles of different acidity utilized either as distinct beds of such discrete particles or as a mixture of such discrete particles. The isomerization process utilizing such a catalyst produces a product which exhibits higher VI as compared to products produced using either catalyst component separately or using a single catalyst having the average acidity of the two discrete catalysts.
    Type: Grant
    Filed: November 1, 1994
    Date of Patent: October 15, 1996
    Assignee: Exxon Research and Engineering Company
    Inventors: Ian A. Cody, Alberto Ravella
  • Patent number: 5565775
    Abstract: The present invention is a method to determine the bound and free fluid index of fluids in porous media by pulsed field gradient (PFG) NMR diffusion measurements. The PFG NMR signal is evaluated using a two-fluid model that describes the self diffusion coefficients for the fluid fractions with low and high translational mobilities.
    Type: Grant
    Filed: June 23, 1995
    Date of Patent: October 15, 1996
    Assignee: Exxon Research and Engineering Company
    Inventors: Frank Stallmach, Hans Thomann
  • Patent number: 5562817
    Abstract: Catalytic reforming wherein the lead reactor contains a catalsyt comprised of platinum and a relatively low level of Re on an inorganic oxide support. The tail reactor contains a platinum rhenium catalyst wherein the rhenium content is at higher levels.
    Type: Grant
    Filed: December 20, 1994
    Date of Patent: October 8, 1996
    Assignee: Exxon Research and Engineering Company
    Inventors: Eduardo Mon, William C. Baird
  • Patent number: 5563212
    Abstract: The present invention provides for microporous ceramic materials having a surface area in excess of 50 m.sup.2 /gm and an open microporous cell structure wherein the micropores have a mean width of less than 20 Angstroms and wherein said microporous structure comprises a volume of greater than about 0.015 cm.sup.3 /gm of the ceramic. The invention also provides for a preceramic composite intermediate composition comprising a mixture of a ceramic precursor and finely divided particles comprising a non-silicon containing ceramic, carbon, or an inorganic compound having a decomposition temperature in excess of 400.degree. C., whose pyrolysis product in inert atmosphere or in an ammonia atmosphere at temperatures of up to less than about 1100.degree. C. gives rise to the microporous ceramics of the invention.
    Type: Grant
    Filed: May 24, 1994
    Date of Patent: October 8, 1996
    Assignee: Exxon Research and Engineering Company
    Inventors: John P. Dismukes, Jack W. Johnson, Edward W. Corcoran, Jr., Joseph Vallone
  • Patent number: 5561056
    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## where A=CH.sub.2, B=CH.sub.2 CH.sub.2 O, x=1-10 and y=2-20.
    Type: Grant
    Filed: October 17, 1995
    Date of Patent: October 1, 1996
    Assignee: Exxon Research and Engineering Company
    Inventors: Cornelius H. Brons, Jan Bock, Ramesh Varadaraj, Stanley J. Brois
  • Patent number: 5560848
    Abstract: The oxidation stability of polyol ester based lithium soap thickened greases is improved by use of a synergistic antioxidant combination comprising a mixture of (alkylated) diphenyl amine and phenothiazine.
    Type: Grant
    Filed: May 26, 1995
    Date of Patent: October 1, 1996
    Assignee: Exxon Research and Engineering Company
    Inventor: Jeenok T. Kim
  • Patent number: 5558807
    Abstract: A high temperature long bearing life grease is disclosed comprising a wax isomerate based base stock plus an antioxidant consisting of a metal salt and a diphenyl amine. The base stock may be 100% wax isomerate oil or mixture of wax isomerate oil and mineral oil boiling in the lube oil boiling range.
    Type: Grant
    Filed: May 19, 1995
    Date of Patent: September 24, 1996
    Assignee: Exxon Research and Engineering Company
    Inventor: Jeenok T. Kim
  • Patent number: 5557268
    Abstract: The present invention is a system and method for identifying a vehicle for the purpose of displaying diagnostic information to the driver. Each vehicle includes a transponder that transmits an encoded character sequence that is unique to that vehicle. In this way vehicle diagnostic measurements made at the establishment entrance can be associated with the vehicle, and displayed to the customer when the vehicle is recognized again at a service area.
    Type: Grant
    Filed: February 24, 1995
    Date of Patent: September 17, 1996
    Assignee: Exxon Research and Engineering Company
    Inventors: Gerard J. Hughes, Leonard J. Duncan, David P. Goshorn, James P. Stokes
  • Patent number: 5552068
    Abstract: A lubricant oil composition having balanced antiwear/extreme pressure and stability properties while providing friction reduction which comprises:(1) a major amount of a lubricating oil basestock; and(2) a minor amount of an amine phosphate salt of the formula: ##STR1## where R.sub.1 is C.sub.9 to C.sub.22, R.sub.2 and R.sub.3 are each independently C.sub.1 to C.sub.4 hydrocarbyl, R.sub.4 is c.sub.10 to c.sub.20 hydrocarbyl, and R.sub.5 is hydrogen to c.sub.10 to c.sub.20 hydrocarbyl; wherein the amine phosphate salt is soluble in the lubricant oil basestock at 25C, is a liquid at 25C, and the ratio of gram-atomic-equivalents of amine to phosphate in said salt is from about 1.0 to 1.2.
    Type: Grant
    Filed: August 2, 1994
    Date of Patent: September 3, 1996
    Assignee: Exxon Research and Engineering Company
    Inventor: Martin G. Griffith
  • Patent number: 5552035
    Abstract: A process for producing zeolite aggregates involves providing a formable paste composed of zeolite, a binder composed of an organic/metal oxide containing aluminum, a peptizing agent and water; forming the paste into an aggregate, preferably by extruding into an extrudate; curing the aggregate; hydro-thermally calcining the aggregate; and washing the hydro-thermally calcined aggregate with a washing medium, preferably followed by rinsing with a rinsing medium to remove residual washing medium from the aggregate. The washed and rinsed aggregate may then be permitted to equilibrate or is subjected to a drying procedure. Preferably, the washed and rinsed aggregate is again subjected to curing/hydro-thermal calcining.
    Type: Grant
    Filed: July 6, 1994
    Date of Patent: September 3, 1996
    Assignee: Exxon Research and Engineering Company
    Inventors: Mark J. Potter, Jar-Lin Kao, Virginia R. Cross, Thomas H. Vanderspurt, Edward K. Dienes, Robert E. Riley, Freddie L. Tungate, Arie Bortinger
  • Patent number: 5552119
    Abstract: A method and apparatus are described for contacting solid particles and fluid. A liquid is sprayed as liquid droplets from the discharge tip of a nozzle into hot solid particles passing upwardly in a vertical pipe. A venturi is formed in the pipe, and the venturi has an entrance portion which is upwardly convergent to the throat and an exit portion which is upwardly divergent from the throat. The tip of the nozzle is so located relative to the venturi that liquid droplets commence vaporization, due to heat transfer from the hot solid particles, no further up stream (relative to the direction of movement of solid particles up the pipe) than the throat of the venturi thereby resulting in a high degree of turbulence which causes good mixing of particles and vapor downstream of the venturi throat. The particles-vapor mixture leaving the exit portion of the venturi is well mixed and particles are substantially uniformly mixed with vapor in radial planes of the pipe downstream of the venturi.
    Type: Grant
    Filed: December 22, 1994
    Date of Patent: September 3, 1996
    Assignee: Exxon Research and Engineering Company
    Inventor: Philip Holmes
  • Patent number: 5552034
    Abstract: Disclosed is a fluid catalytic cracking process in which the catalytic cracking reaction takes place in a dilute phase, and the reaction product contains a reduced volume of off gas having a low concentration of SO.sub.x and NO.sub.x. The use of off gas, which is produced during a regeneration step, to strip entrained vapor from spent catalytic cracking catalyst acts to reduce SO.sub.x and NO.sub.x byproducts, and eliminates the need to separately recover and treat the off gas stream from the regenerator portion of the system. The entire process, including the reaction step, the stripping step and the regeneration step, can be performed in a single vessel, and the stripping and reaction steps take place entirely in the dilute phase.
    Type: Grant
    Filed: June 13, 1994
    Date of Patent: September 3, 1996
    Assignee: Exxon Research and Engineering Company
    Inventor: Patrick H. Terry
  • Patent number: 5550199
    Abstract: A new copolymer composition comprising the hard segment of a polyimide, the soft segment of an oligomeric aliphatic polyester, and a diepoxide for crosslinking and esterification. The new diepoxide polyimide copolymer membranes have exhibited high selectivity and flux for separation of an aromatic/saturate mixture. These new membranes have shown much better stability in soaking with an aromatic/saturate feed than the copolymer membranes without a diepoxide.
    Type: Grant
    Filed: November 21, 1995
    Date of Patent: August 27, 1996
    Assignee: Exxon Research and Engineering Company
    Inventors: Win-Sow W. Ho, Guido Sartori, Warren A. Thaler, David C. Dalrymple
  • Patent number: 5550241
    Abstract: The present invention relates to novel adducts of cyclic carbonyl monomers with substituted olefins, which also are useful as solution viscosifiers.
    Type: Grant
    Filed: March 18, 1993
    Date of Patent: August 27, 1996
    Assignee: Exxon Research and Engineering Company
    Inventor: Stanley J. Brois
  • Patent number: 5549744
    Abstract: The present invention provides for a method of making storage stable road paving binders by blending a minor amount of a polymer having at least one diene monomer with a major amount of asphalt containing at least 0.3% by weight of total nitrogen at an elevated temperature such that the components are sufficiently fluid to blend; treating the asphalt-polymer blend using not more than 250 meq of a sulfonating agent per 100 g of asphalt-polymer blend to introduce the corresponding acid functionality into the blend; maintaining the sulfonated asphalt-polymer blend at a sufficiently elevated temperature and stripping the sulfonated blend with sufficient chemically unreactive gas to remove a major fraction of the acid functionality introduced by sulfonation. The invention also provides for the compositions made by the process. These are useful as binders in road paving applications.
    Type: Grant
    Filed: September 8, 1995
    Date of Patent: August 27, 1996
    Assignee: Exxon Research and Engineering Company
    Inventors: Olga Puzic, Larry J. Evers, Kenneth E. Williamson, Martin L. Gorbaty, Nicholas C. Nahas
  • Patent number: 5549815
    Abstract: Disclosed is a method for fluidizing a dense phase bed of solid particles, preferably a method for fluidizing a dense phase bed of solid catalyst particles. The method includes the steps of continuously supplying a flowing fluid stream in a downward direction within an enclosed volume; contacting an upper surface of a dense phase bed of solid particles resting within the enclosed volume with the downward flowing fluid stream; continuously directing the flowing fluid stream into the dense phase bed of particles to form a continuous fluidized bed of solid particles within the enclosed volume; directing the flowing fluid stream in an upward direction after contacting the upper surface of the dense phase bed; and collecting the flowing fluid stream.
    Type: Grant
    Filed: May 20, 1994
    Date of Patent: August 27, 1996
    Assignee: Exxon Research and Engineering Company
    Inventor: William A. Wachter
  • Patent number: 5549881
    Abstract: A process to make a seed high silica zeolite having a faujasite structure and a silica to alumina ratio greater than 6, and containing tetrapropyl ammonium and/or tetrabutyl ammonium trapped within the supercages of said structure. The optimally seeds are aged for specific times.
    Type: Grant
    Filed: November 29, 1994
    Date of Patent: August 27, 1996
    Assignee: Exxon Research and Engineering Company
    Inventors: David E. W. Vaughan, Karl G. Strohmaier
  • Patent number: 5545237
    Abstract: A fuel mixture containing an ionic complex of an amine salt of a phosphoric acid is effective in reducing the smoke emitted during operation of a two-cycle internal combustion engine. A preferred phosphoric acid derivative is dioctyldithiophosphate. A preferred primary amine component is dihydrogenated tallow amine.
    Type: Grant
    Filed: September 19, 1995
    Date of Patent: August 13, 1996
    Assignee: Exxon Research and Engineering Company
    Inventors: Jacob J. Habeeb, Christopher J. May
  • Patent number: 5545270
    Abstract: A high strength steel composition comprising ferrite and martensite/banite phases, the ferrite phase having primarily vanadium and mobium carbide or carbonitride precipitates, is prepared by a first rolling above the austenite recrystallization temperature; a second rolling below the anstenite recrystallization temperature; a third rolling between the Ar.sub.3 and Ar.sub.1 transformation points, and water cooling to below about 400.degree. C.
    Type: Grant
    Filed: December 6, 1994
    Date of Patent: August 13, 1996
    Assignee: Exxon Research and Engineering Company
    Inventors: Jayoung Koo, Michael J. Luton