Patents Examined by Margaret B. Medley
  • Patent number: 5024773
    Abstract: The present invention is directed toward a method for preparing Group II metal overbased sulfurized alkylphenols. In particular, the present invention employs a sulfurization catalyst in the preparation of Group II metal overbased sulfurized alkylphenols. Use of a sulfurization catalyst in this preparation results in a product generally characterized as having lower crude sediment, a higher Total Base Number and lower viscosity than a similar product prepared without using a sulfurization catalyst.
    Type: Grant
    Filed: May 17, 1989
    Date of Patent: June 18, 1991
    Assignee: Chevron Research Company
    Inventor: Thomas V. Liston
  • Patent number: 5022892
    Abstract: A method of cleaning particulate coal which is fed with a dense medium slurry as an inlet feed to a cyclone separator. The coal particle size distribution is in the range of from about 37 microns to about 600 microns. The dense medium comprises water and ferromagnetic particles that have a relative density in the range of from about 4.0 to about 7.0. The ferromagnetic particles of the dense medium have particle sizes of less than about 15 microns and at least a majority of the particle sizes are less than about 5 microns. In the cyclone, the particulate coal and dense-medium slurry is separated into a low gravity product stream and a high gravity produce stream wherein the differential in relative density between the two streams is not greater than about 0.2. The low gravity and high gravity streams are treated to recover the ferromagnetic particles therefrom.
    Type: Grant
    Filed: January 3, 1990
    Date of Patent: June 11, 1991
    Assignee: United States Department of Energy
    Inventors: Mark S. Klima, Carl P. Maronde, Richard P. Killmeyer
  • Patent number: 5015402
    Abstract: Basic metal dihydrocarbylphosphorodithioates and phosphoromonothioates are prepared by employing a catalytic amount of an alkali metal or alkaline earth metal hydroxide or mixtures thereof. Also basic, multiple metal complexes of various dihydrocarbylphosphorodithioic acids have been developed. These salts and complexes are highly effective antiwear and antioxidant additives for functional fluids, e.g., lubricating oils.
    Type: Grant
    Filed: October 24, 1989
    Date of Patent: May 14, 1991
    Assignee: The Lubrizol Corporation
    Inventors: Richard Yodice, Alan C. Clark
  • Patent number: 5013329
    Abstract: A process is disclosed for converting a light hydrocarbon feedstock that contains a mixture of linear and branched olefins to ether-rich high octane gasoline streams that include tertiary alkyl and isoalkyl ethers such as MTBE, TAME, methyl isopropyl ether (MIPE), and methyl sec-butylether (MSBE). The conversion is achieved by utilizing the differing reactivity of tertiary olefins under selected conditions compared to linear olefins in the catalyzed etherification processes. The discovery has been made that unreacted olefins from the etherification reactions can be converted to gasoline boiling range hydrocarbons by contacting them with zeolite catalyst at elevated temperature. Further, it has been discovered that unreacted paraffins in the integrated process can be dehydrogenated to produce C.sub.3 -C.sub.4 olefins which can be recycled to the etherification process.
    Type: Grant
    Filed: March 31, 1989
    Date of Patent: May 7, 1991
    Assignee: Mobil Oil Corporation
    Inventors: Weldon K. Bell, Werner O. Haag, Mohsen N. Harandi, Hartley Owen
  • Patent number: 5013466
    Abstract: A lubricating grease exhibits good lubricating performance in a hot and high-vacuum environment, and contains an alkyl substituted tetraphenylether as a base oil having incorporated therein bentonite as a thickener and at least one solid lubricant selected from the group consisting of molybdenum disulfide and tungsten disulfide.
    Type: Grant
    Filed: March 21, 1990
    Date of Patent: May 7, 1991
    Assignees: Japan Atomic Energy Research Institute, Natsumra Oil Research Corporation
    Inventors: Kenjiro Obara, Kazuyuki Nakamura, Yoshio Murakami, Takao Soda, Toshihiro Kanie, Tamio Adaka
  • Patent number: 5011502
    Abstract: A liquid fuel additives or combustion aid which can be prepared by dissolving solid prepared from seawater and a strong alkali, into a medium miscible with a fuel to which it is applied. The fuel additives can be directly added to petroleum fuels, such as gasoline and light oil, and is usable in all types of combustion engines to improve combustibility, fuel efficiency, etc.
    Type: Grant
    Filed: September 17, 1990
    Date of Patent: April 30, 1991
    Inventor: Atsushi Nasu
  • Patent number: 5011503
    Abstract: A hydrocarbon-based fuel to which has been added a minor amount, sufficient to increase the cetane value of the fuel, of a perketal of the formulaR.sup.2 R.sup.3 C(OOR.sup.1).sub.2wherein R.sup.1 is a C.sub.4-10 tertiary alkyl group and R.sup.2 and R.sup.3 together with the attached C atom form a cycloalkane ring optionally substituted by one or more C.sub.1-4 alkyl radicals or other essentially inert substituents, such as halogen.
    Type: Grant
    Filed: January 22, 1990
    Date of Patent: April 30, 1991
    Assignee: Shell Oil Company
    Inventor: John P. Buxton
  • Patent number: 5011506
    Abstract: A method is disclosed combining the process for the hydration or etherification of light linear olefins, such as the production of diisopropyl ether (DIPE), with the process for the etherification of C.sub.4 + or C.sub.4 hydrocarbons containing isobutylene to produce alkyl tertiary butyl ether or ether-rich gasoline in a manner which effectively dewaters alkanol using the iso-olefin hydrocarbon feedstream as extractant. The combined process leads to the production of isopropyl tert-alkyl ethers. In the integrated process the high octane ethers produced may include methyl tert-butyl ether, methyl tert-amyl ether, isopropyl tert-butyl ether and diisopropyl ether. The process also results in the production of a gasoline stream rich in high octane ethers.
    Type: Grant
    Filed: September 29, 1989
    Date of Patent: April 30, 1991
    Assignee: Mobil Oil Corporation
    Inventors: Mohsen N. Harandi, Hartley Owen
  • Patent number: 5011617
    Abstract: Disclosed is complex tolylene polyurea-thickened grease containing less than 7 parts per million 2,4-diaminotoluene and a process for making said grease comprising reacting an isocyanate, a polyamine and monoamine with a major portion of a lubricating oil and thereafter adding an alkaline earth metal oxide or hydroxide and a carboxylic acid anhydride containing 2 to 20 carbon atoms to said mixture and thereafter milling said mixture to the consistency of grease.
    Type: Grant
    Filed: February 9, 1990
    Date of Patent: April 30, 1991
    Assignee: Chevron Research and Technology Company
    Inventor: Gian L. Fagan
  • Patent number: 5009672
    Abstract: Process for recycling and recovering solid urban waste and the like, consisting in subjecting solid urban waste (SUW), after the removal of any ferromagnetic material present therein, to high-pressure compression inside a screening press or the like, so as to separate the putrescible organic material from the dry material intended to form the combustible material, then subjecting the organic material to a process of anaerobic fermentation in a sealed and dry environment, so as to allow to extract, at the end of the fermentation cycle, the biogas thus produced, which can be used directly for producing electric power or for other uses, the residuals of fermentation in the form of humus being subsequently subjected to refining and then to screening to recover the light materials; sifting, within a known rotary screen, the dry material so as to separate the combustible components, such as paper, fabrics, wood, plastics, leather and rubber, from the inert ones, such as glass, non-ferrous metals and any organic par
    Type: Grant
    Filed: September 13, 1989
    Date of Patent: April 23, 1991
    Assignee: Vezzani S.p.A.
    Inventors: Giorgio Ruffo, Luciano Vezzani
  • Patent number: 5009670
    Abstract: Fuels for gasoline engines contain small amounts of copolymers of alkyl (meth)-acrylates where the alkyl radical is of 8 to 40 carbon atoms and/or vinyl esters of carboxylic acids of 8 to 40 carbon atoms and monoethylenically unsaturated mono- and/or dicarboxylic acids of 3 to 12 carbon atoms and/or monoethylenically unsaturated compounds having sulfo and/or phosphonic acid groups, having a total molecular weight of from 500 to 20,000 g per mole, some or all of the carboxyl, sulfo and phosphonic acid groups of the copolymers having been reacted with an alkali or alkaline earth with formation of the alkali metla salts or alkaline earth metal salts and the remainder of the acid groups having been reacted with ammonia and/or amines of not more than 50 carbon atoms to give the corresponding amide groups and/or ammonium salts.
    Type: Grant
    Filed: May 16, 1989
    Date of Patent: April 23, 1991
    Assignee: BASF Aktiengesellschaft
    Inventors: Franz-Dieter Martischius, Hans-Henning Vogel, Norbert Greif, Knut Oppenlaender, Walter Denzinger, Heinrich Hartmann
  • Patent number: 5008005
    Abstract: A process and apparatus for the production of coke, asphalt and jet fuel m a feed of fossil fuels containing volatile carbon compounds therein is disclosed. The process includes the steps of pyrolyzing the feed in an entrained bed pyrolyzing means, separating the volatile pyrolysis products from the solid pyrolysis products removing at least one coke from the solid pyrolysis products, fractionating the volatile pyrolysis products to produce an overhead stream and a bottom stream which is useful as asphalt for road pavement, condensing the overhead stream to produce a condensed liquid fraction and a noncondensable, gaseous fraction, and removing water from the condensed liquid fraction to produce a jet fuel-containing product. The disclosed apparatus is useful for practicing the foregoing process. the process provides a useful method of mass producing and jet fuels from materials such as coal, oil shale and tar sands.
    Type: Grant
    Filed: October 17, 1989
    Date of Patent: April 16, 1991
    Assignee: The United States of America as represented by the Department of Energy
    Inventor: Jer Y. Shang
  • Patent number: 5006271
    Abstract: Sulfurized propylene based lube olefin derivatives are superior lubricating fluids with internal synergistic multifunctional extreme pressure/antiwear and antioxidant properties as well as multifunctional extreme pressure/antiwear additives for both mineral and synthetic lubricating oils as well as fuels.
    Type: Grant
    Filed: December 30, 1988
    Date of Patent: April 9, 1991
    Assignee: Mobil Oil Corporation
    Inventors: Noyes L. Avery, Linda A. Benjamin, Andrew G. Horodysky, Derek A. Law
  • Patent number: 5006130
    Abstract: Intake valve deposits in port fuel injected engines are reduced by using a mixture of (a) of about 2.5 ppmw or higher of basic nitrogen in the form of an oil-soluble aliphatic alkylene polyamine containing at least one olefinic polymer chain, said polyamine having a molecular weight of about 600 to about 10,000, and (b) from about 75 ppmw to about 125 ppmw based on the fuel composition of certain oil-soluble olefinic polymers, poly(oxyalkylene) alcohol, glycol or polyol or mono or di ether thereof, non-aromatic oils or polyalpha olefins. The fuels are also compatible with carburetor and throttle body injected engines.
    Type: Grant
    Filed: June 28, 1989
    Date of Patent: April 9, 1991
    Assignee: Shell Oil Company
    Inventors: Robert P. Aiello, Michael J. Riley, Herbert D. Millay
  • Patent number: 5004478
    Abstract: A motor fuel for internal combustion engines contains a small amount of an additive comprising(a) a conventional amino- or amido-containing detergent for cleaning, or keeping clean, the intake system and(b) as base oil a mixture of(ba) a polyether based on propylene oxide or butylene oxide and having a molecular weight of not less than 500 and(bb) an ester of a monocarboxylic or polycarboxylic acid and an alkanol or polyol, this ester having a minimum viscosity of 2 mm.sup.2 /s at 100.degree. C.
    Type: Grant
    Filed: October 31, 1989
    Date of Patent: April 2, 1991
    Assignee: BASF Aktiengesellschaft
    Inventors: Hans-Henning Vogel, Hans P. Rath, Claus P. Jakob, Knut Oppenlaender
  • Patent number: 5004480
    Abstract: Diesel fuel compositions containing dimethyl carbonate reduce pollution levels resulting when said fuel is combusted in a diesel engine.
    Type: Grant
    Filed: May 31, 1988
    Date of Patent: April 2, 1991
    Assignee: Union Oil Company of California
    Inventor: Diane D. Kanne
  • Patent number: 5002588
    Abstract: Additive reaction products of (1) hydrocarbyl diols, and (2) the product of benzophenone tetracarboxylic dianhydride and hydrocarbyl aminoalcohols and/or amines improve the low-temperature properties of distillate fuels when added thereto.
    Type: Grant
    Filed: December 18, 1989
    Date of Patent: March 26, 1991
    Assignee: Mobil Oil Corporation
    Inventors: David J. Baillargeon, Angeline B. Cardis, Dale B. Heck
  • Patent number: 5002589
    Abstract: Additives which improve the low-temperature properties of distillate fuels are the reaction products of (1) diaminodiols, and (2) the product of pyromellitic dianhydride and aminoalcohols and/or amines with long-chain hydrocarbyl groups attached.
    Type: Grant
    Filed: December 13, 1989
    Date of Patent: March 26, 1991
    Assignee: Mobil Oil Corp.
    Inventors: David J. Baillargeon, Angeline B. Cardis, Dale B. Heck
  • Patent number: 5000757
    Abstract: Apparatus for the preparation of emulsions of oil in water comprises:(a) an oil feed line,(b) a source of concentrated surfactant solution,(c) a source of water,(d) a first low shear mixer for mixing concentrated surfactant and water to form a dilute surfactant solution,(e) means for uniting the flows of dilute surfactant solution and oil in a controlled manner,(f) a second low shear mixer for mixing the united flow streams of oil and dilute surfactant solution to form an emulsion of oil in water,(g) a third low shear mixer for mixing the emulsion of oil in water to form a dilute emulsion, and,(h) an arrangement of water feed lines and control valves such that, firstly, water can be supplied either to the first low shear mixer only or, secondly, to both first and third low shear mixers.The apparatus is particularly suitable for the preparation of emulsions of fuel oil in water from oils within a wide range of viscosities which burn with low emissions of NO.sub.x and particulates.
    Type: Grant
    Filed: July 26, 1988
    Date of Patent: March 19, 1991
    Assignee: British Petroleum Company p.l.c.
    Inventors: Simon J. Puttock, Ian D. Somerville
  • Patent number: 5000758
    Abstract: Additives comprising the reaction products of aminodiols and the products of benzophenone tetracarboxylic dianhydride and aminoalcohols and/or amines with long-chain hydrocarbyl groups attached improve the low-temperature properties of distillate fuels.
    Type: Grant
    Filed: December 13, 1989
    Date of Patent: March 19, 1991
    Assignee: Mobil Oil Corp.
    Inventors: David J. Baillargeon, Angeline B. Cardis, Dale B. Heck