Patents Examined by Margaret B. Medley
  • Preparation of coal substitute of low ash and sulfur
    Patent number: 4830634
    Abstract: A process is taught for preparing a coal substitute of low ash level from a composite of coal, mineral matter and pyritic sulfur comprising comminuting the coal composite in an aqueous medium to a size range which promotes the liberation of the mineral matter; subjecting the resulting slurry to fines agglomeration in the presence of a water-insoluble bridging organic liquid; separating the agglomerates from the liquid phase containing the bulk of the mineral matter and a portion of the pyritic sulfur; treating the coal fines by stripping the organic liquid from the fines surface; and redispersing the fines in an aqueous medium having a surface active agent to yield a high solids coal fines slurry so to permit magnetic separation of residual pyritic sulfur and other magnetic mineral matter.
    Type: Grant
    Filed: September 3, 1986
    Date of Patent: May 16, 1989
    Assignee: Exportech Company, Inc.
    Inventor: Robin R. Oder
  • Hydrocarbon fuels containing sulfonyl dialkanol esters
    Patent number: 4830636
    Abstract: New fuel and lubricant compositions are provided which, when used to fuel or lubricate an engine such as an internal combustion engine, help to reduce friction in such engine. It is contemplated that these compositions will also reduce fuel consumption by the engine.
    Type: Grant
    Filed: September 13, 1988
    Date of Patent: May 16, 1989
    Assignee: Mobil Oil Corporation
    Inventor: Andrew G. Horodysky
  • Grease compositions containing borated oxazoline compounds and hydroxy-containing soap thickeners
    Patent number: 4828734
    Abstract: Disclosed is a grease composition comprising a major proportion of a grease, a hydroxy-containing soap thickener and a minor amount of a boronated oxazoline compound. The hydroxy-containing soap thickener and boronated oxazoline compound are each added in amounts sufficient to increase the dropping point of the grease an appreciable amount. Generally this can be an increase of at least 15.degree. F. and could be as great as 200.degree. F. to 250.degree. F. or more. Sulfur and phosphorus compounds can also be incorporated into the composition.
    Type: Grant
    Filed: May 14, 1987
    Date of Patent: May 9, 1989
    Assignee: Mobil Oil Corporation
    Inventors: John P. Doner, Andrew G. Horodysky, John A. Keller, Jr.
  • Copper salts of hindered phenolic carboxylates and lubricants and fuels containing same
    Patent number: 4828733
    Abstract: Copper salts of hindered phenol carboxylic acids are used in lubricants and fuels compositions as an antioxidant.
    Type: Grant
    Filed: November 12, 1987
    Date of Patent: May 9, 1989
    Assignee: Mobil Oil Corporation
    Inventors: Liehpao O. Farng, Horodysky Andrew G.
  • Mixed hydroquinone-hydroxyester borates as antioxidants
    Patent number: 4828740
    Abstract: Mixed hydroquinones-hydroxyester borates have been found to be effective multifunctional additives when incorporated into various lubricating media.
    Type: Grant
    Filed: July 29, 1987
    Date of Patent: May 9, 1989
    Assignee: Mobil Oil Corporation
    Inventors: Liehpao O. Farng, Andrew G. Horodysky
  • Aqueous lubricant composition
    Patent number: 4828735
    Abstract: An aqueous lubricant composition contains a first polyether component represented by the general formula I given below, a second polyether component expressed by the general formula II given below and a polyamide component represented by the general formula III. This composition exhibiting a highly advantageous viscosity behavior over a wide range of temperatures has a high resistivity against shearing stress and a superior storage stability, and is thus very suitable for use as a hydraulic fluid, metal drawing fluid, cutting fluid, press oil and the like even in the form of a high water base fluid having a water content over 80% by the components are weight: ##STR1## in which R.sup.1 represents a hydrocarbon group having 5-26 carbon atoms, R.sup.2 is a residue of a polyhydric alcohol, a polyhydric phenol or a polyamine each having 2-26 carbon atoms, R.sup.
    Type: Grant
    Filed: October 29, 1987
    Date of Patent: May 9, 1989
    Assignee: Nippon Oil and Fats Co., Ltd.
    Inventors: Kenichiro Minagawa, Kazuo Furuse, Yoshiharu Tanizaki, Heihachiro Okabe
  • Lubrication boosting additives and lubricating oil compositions comprising the same
    Patent number: 4826614
    Abstract: A lubrication boosting additive comprising a mixture of a fluororesin, which is an alternating copolymer of a fluoroolefin and vinyl ether, soluble in an organic solvent and a phthalic ester in an organic solvent. The amounts of the organic solvent and the phthalic acid are, respectively, from 50 to 500 parts by weight and from 1 to 50 parts by weight per 100 parts by weight of the fluororesin. The additive is added to lubricating oils in an amount of from 0.1 to 10 g, calculated as the fluororesin, per liter of the lubricating oil.
    Type: Grant
    Filed: October 17, 1986
    Date of Patent: May 2, 1989
    Assignees: Violet Co., Ltd., Wako Technical Co., Ltd., both of
    Inventor: Ryoji Watanabe
  • Inflame desulfurization and denoxification of high sulfur containing fuels
    Patent number: 4824439
    Abstract: A process for the preparation of a liquid fuel and resulting fuel including a sulfur and nitrogen capturing additive consisting essentially of Na.sup.+, Fe.sup.++ and an element X selected from group consisting of Mg.sup.++, Ba.sup.++, Ca.sup.++, Li.sup.+, K.sup.+ and mixtures thereof wherein Na.sup.+ is present in an amount of less or equal to 40 wt. % based on the total weight of the water soluble additive Fe.sup.++ is present in an amount of greater than or equal to 0.4 wt. % based on the total weight of the water soluble additive with the balance essentially element X wherein the ratio of Na.sup.+ and Fe.sup.++ is about between 7.5:1.0 to 100:1.0.
    Type: Grant
    Filed: December 16, 1987
    Date of Patent: April 25, 1989
    Assignee: Intevep, S.A.
    Inventors: Domingo R. Polanco, Jose S. Perez, Euler J. Grazzina, Niomar Marcano
  • Method of manufacturing an improved multi-grade lubricating grease
    Patent number: 4822503
    Abstract: A method for manufacturing a lubricating grease having improved properties is described. The method comprises reacting a pyrrolidone with a fatty amine and subsequently adding a metal hydroxide to the reaction when the unreacted fatty amine content ranges between about 33 and about 66 wt. % of the fatty amine originally added. The grease thus formed will be a NLGI #0 grade grease that has the high temperature stay-in-place properties of a NGLI #2 grade grease.
    Type: Grant
    Filed: April 13, 1987
    Date of Patent: April 18, 1989
    Assignee: Exxon Research and Engineering Company
    Inventors: James H. Norton, William Nywening, Phillip W. Brewster, A. Gordon Alexander
  • Lubricating oil containing viscosity index improver
    Patent number: 4812261
    Abstract: Lubricating oil of improved dispersancy and anti-oxidancy contains an ethylene-propylene copolymer onto which has been graft polymerized allyl glycidyl ether, the graft polymer having been thereafter functionalized with (i) N-vinyl pyrrolidone and (ii) a Mannich base formed from N-(aminoethyl) piperazine, formaldehyde, and nonyl phenol.
    Type: Grant
    Filed: August 12, 1987
    Date of Patent: March 14, 1989
    Assignee: Texaco Inc.
    Inventors: Christopher S. Liu, Nicholas Benfaremo, Maria M. Kapuscinski, Larry D. Grina
  • Middle distillate compositions with improved cold flow properties
    Patent number: 4810260
    Abstract: The low temperature properties of a distillate petroleum fuel oil boiling in the range 120.degree. C. to 500.degree. C., and whose 20% and 90% distillation points differ by less than 100.degree. C., and/or whose Final Boiling Point is in the range 340.degree. C. to 370.degree. C. are improved by the addition of a polymer or copolymer having at least 25 wt. % of n-alkyl groups of average number of carbon atoms from 12 to 14 with no more than 10 wt. % containing more than 14 carbon atoms.
    Type: Grant
    Filed: August 27, 1987
    Date of Patent: March 7, 1989
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Robert D. Tack, Sarah L. Pearce, Albert Rossi
  • Antifoulant additives for high temperature hydrocarbon processing
    Patent number: 4810397
    Abstract: Fouling of metallic surfaces contacted with hydrocarbon oils at elevated temperatures is reduced by combining the oils with foulant-inhibiting amounts of thiadiazole compounds or triazole compounds, or aluminum compounds in combinations containing thiadiazole, triazole and acid compounds.
    Type: Grant
    Filed: September 28, 1987
    Date of Patent: March 7, 1989
    Assignee: Union Oil Company of California
    Inventor: Louis M. Dvoracek
  • Method to minimize viscosity and improve stability of coal-water fuels
    Patent number: 4810259
    Abstract: A coal aqueous slurry having a lower viscosity and resistance to thickening with time is provided. The coal aqueous slurry includes water, particulate coal comprising carbonaceous material and water-soluble minerals, a surfactant present in the coal aqueous slurry in an amount sufficient to disperse the particulate coal in the water and a chelating agent. The included chelating agent is capable of forming a chelation complex with the metal ions formed by the water-soluble minerals dissolving into the water. The presence of the chelating, or complexing, agent reduces coagulation of the coal particles, because the chelating agent complexes soluble mineral matter and thereby prevents collapse of the protective water layer surrounding the coal particles.
    Type: Grant
    Filed: September 19, 1985
    Date of Patent: March 7, 1989
    Assignee: Oxce Fuel Company
    Inventors: Walter G. Rakitsky, Martin A. Prieto
  • Stable aqueous suspensions of slag, fly-ash and char
    Patent number: 4808194
    Abstract: A pumpable aqueous suspension of slag, fly-ash, char, and mixtures thereof which contains a surfactant and has a reduced viscosity and increased resistance to sedimentation. The aqueous suspension is produced by quench cooling and/or scrubbing a raw effluent gas stream from the partial oxidation of solid carbonaceous fuel. It may have a solids content of about 1.0 to 50.0 weight percent. The surfactant comprises an anionic or nonionic adduct of an alkyl phenol and polyoxyethylene or polyoxypropylene. In one embodiment, a solid carbonaceous fuel is wet ground with the aforesaid aqueous suspension and make-up water, if any, to produce a stable aqueous slurry feed to the partial oxidation gas generator.
    Type: Grant
    Filed: November 26, 1984
    Date of Patent: February 28, 1989
    Assignee: Texaco Inc.
    Inventors: Mitri S. Najjar, Farrokh Yaghmaie, Louis S. Sorell
  • Fuel extender
    Patent number: 4806129
    Abstract: An efficient and cost competitive fuel extender for mixing with lead-free gasoline used for driving internal combustion engines is provided which makes use of low grade, inexpensive naphtha as its principal ingredient that is upgraded in combination with anhydrous ethanol, toluene, aromatic benzene, xylene and a class of stabilizing and water repellent chemicals, all in a critical range of content. Its synergistic content provides a resultant product that is usable as a compatible additive for lead-free gasoline; it is extremely low in cost, and does not require any engine adjustments or fuel line protection measures; it may be provided with either a so-called regular or "MID" grade octane rating.
    Type: Grant
    Filed: June 15, 1988
    Date of Patent: February 21, 1989
    Assignee: Prepolene Industries, Inc.
    Inventors: George K. Dorn, Herbert A. Gilbert
  • Water-based hydraulic fluids
    Patent number: 4806256
    Abstract: Water-based hydraulic fluids are thickened by admixing the fluid with a viscoelastic surfactant. Viscoelastic surfactants comprise surfactant ions and organic counterions that associate with the hydraulic fluid to form the viscoelastic surfactant. Water-based hydraulic fluids of this invention are highly shear stable and do not experience substantial viscosity loss with an increase in temperature. The hydraulic fluids are capable of providing low amounts of wear in pumping apparatus during use.
    Type: Grant
    Filed: January 13, 1987
    Date of Patent: February 21, 1989
    Assignee: The Dow Chemical Company
    Inventors: Gene D. Rose, Arthur S. Teot
  • Coal-methanol slurry and its production process
    Patent number: 4802891
    Abstract: A coal-methanol slurry having excellent storage stability, transportability and combustibility has been provided by using coal particles having a maximum particle size not greater than 1,500 .mu.m and a cumulative particle size distribution specified with respective to particles of 74 .mu.m and smaller, 10 .mu.m and smaller and 3 .mu.m and smaller and controlling the concentration of the coal particles within a specific range defined in relation to the degree of carbonization of the coal employed. A useful and advantageous production process of the slurry has also been provided, featuring an addition of water and the timing of its addition.
    Type: Grant
    Filed: March 21, 1988
    Date of Patent: February 7, 1989
    Assignees: Mitsui Mining Company, Limited, Mitsui Toatsu Chemicals, Incorporated
    Inventors: Izumi Yamada, Tetsuya Oishi, Kazuhiko Hanashita
  • Perfluoropolyether solid fillers for lubricants
    Patent number: 4803005
    Abstract: Lubricants comprising perfluoropolyether oils containing perfluoropolyether solids as fillers are described.
    Type: Grant
    Filed: August 6, 1986
    Date of Patent: February 7, 1989
    Assignee: Exfluor Research Corporation
    Inventors: Timothy J. Juhlke, Thomas R. Bierschenk, Richard J. Lagow
  • Process for the production and burning of a natural-emulsified liquid fuel
    Patent number: 4801304
    Abstract: A process for the preparation of a natural liquid fuel and, more particularly, a process that allows a high sulfur natural fuel to be converted into energy by combustion with a substantial reduction in sulfur oxide emissions.
    Type: Grant
    Filed: June 17, 1986
    Date of Patent: January 31, 1989
    Assignee: Intevep, S.A.
    Inventors: Domingo R. Polanco, Ignacio Layrisse, Hercilio Rivas, G. Euler Jimenez, Lirio Q. de Paz, Jose P. Salazar, Mayela Rivero, Emilio Guevara, Maria L. Chirinos
  • Lubricating compositions
    Patent number: 4801390
    Abstract: Lubricating compositions particularly for crankcase lubrication of gasoline and diesel engines in automobiles and trucks have improved viscometric properties by the incorporation of an ashless dispersant and a dispersant viscosity improver with increased boron content of at least 0.02 wt. % of the composition, preferably in the form of an ashless dispersant borated to a higher level.
    Type: Grant
    Filed: May 28, 1985
    Date of Patent: January 31, 1989
    Assignee: Exxon Research & Engineering Co.
    Inventor: Robert Robson