Patents Examined by Theodore Morris
  • Process for the catalytic conversion of a hydrocarbon feedstock
    Patent number: 5213679
    Abstract: Catalytic conversion of a hydrocarbon feedstock comprising a stage of catalytic cracking of a hydrocarbon feedstock, a stage of separation of the products of cracking from the catalytic mass, and a stage of regeneration and recycling of the catalytic mass and between the stage of regeneration of the catalytic mass and the stage of separation of the products of cracking there is injected continuously or intermittently, at one or more points, in admixture with at least one hydrocarbon to be treated, at least one diorganophosphite of the general formula ##STR1## where R.sub.1 and R.sub.2, which may be alike or different, are selected from the group consisting of alkyl, aryl or aralkyl groups having from 1 to 30 carbon atoms.
    Type: Grant
    Filed: October 15, 1990
    Date of Patent: May 25, 1993
    Assignee: Compagnie de Raffinage et de Distribution Total France
    Inventors: Michael Bourgogne, Jean-Claude Courcelle, Claude Marty
  • Method for inhibiting foulant formation in organic streams using erythorbic acid or oximes
    Patent number: 5213678
    Abstract: A method for inhibiting fouling in an organic process stream by adding certain oximes, hydrazine, erythorbic acid, carbohydrazide, or mixtures thereof. The antifoulant is added to the organic stream as an aqueous solution.
    Type: Grant
    Filed: February 8, 1991
    Date of Patent: May 25, 1993
    Assignee: Ashchem I.P., Inc.
    Inventors: Kaj D. Rondum, Guy A. DeVicaris, Dwight E. Emerich
  • Spinning pitch for carbon fibers and process for its production
    Patent number: 5213677
    Abstract: Spinning pitch for carbon fibers, which (1) has a glass transition temperature width of at most 60.degree. C. as measured by a differential scanning calorimeter, (2) contains at least 80% by volume an optically anisotropic phase, and (3) shows a shear viscosity of 200 poise at a temperature of from 270.degree. to 370.degree. C.
    Type: Grant
    Filed: October 22, 1991
    Date of Patent: May 25, 1993
    Assignee: Mitsubishi Kasei Corporation
    Inventors: Iwao Yamamoto, Ryuichi Hara, Toshiyuki Tajiri, Kazuo Shirosaki, Akihiko Yoshiya
  • Method for preparation of LiCoO.sub.2 intercalation compound for use in secondary lithium batteries
    Patent number: 5211933
    Abstract: Methods are described for the low temperature preparation of the spinel LiMn.sub.2 O.sub.4 and layered LiCoO.sub.2 phases which are intercalable compounds of interest for use in lithium secondary batteries. These phases can be prepared in bulk or thick film form at temperatures less than 400.degree. C. using acetate precursors.
    Type: Grant
    Filed: April 30, 1992
    Date of Patent: May 18, 1993
    Assignee: Bell Communications Research, Inc.
    Inventors: Philippe Barboux, Frough K. Shokoohi, Jean-Marie Tarascon
  • Catalytic reforming process with sulfur preclusion
    Patent number: 5211837
    Abstract: A hydrocarbon feedstock is catalytically reformed to effect dehydrocyclization of paraffins in a process combination comprising a first reforming zone and a sulfur-removal zone utilizing a manganese component to preclude sulfur from the feed to a second reforming zone. The process combination shows substantial benefits over prior art processes in the stability of the extremely sulfur-sensitive catalyst utilized in the second reforming zone.
    Type: Grant
    Filed: February 27, 1992
    Date of Patent: May 18, 1993
    Assignee: UOP
    Inventors: Michael B. Russ, Roger L. Peer, Joseph Zmich, Chi-Chu D. Low
  • Reaction products of polyalkenyl succinic anhydrides with aromatic secondary amines and aminoalcohols as process antifoulants
    Patent number: 5211836
    Abstract: Reaction products of polyalkenyl succinic anhydrides with aromatic secondary amines, then further reacted with aminoalcohols are used as effective antifoulants in liquid hydrocarbonaceous mediums, such as crude oils and gas oils, during processing of such liquids at elevated temperatures. The reaction products are formed via a two-step reaction in which a polyalkenylsuccinic anhydride precursor is reacted with an aromatic secondary amine to form polyalkenylsuccinamide intermediate which, in turn, is reacted with an aminoalcohol.
    Type: Grant
    Filed: March 12, 1992
    Date of Patent: May 18, 1993
    Assignee: Betz Laboratories, Inc.
    Inventor: David R. Forester
  • Method for controlling fouling deposit formation in a liquid hydrocarbonaceous medium using boronated derivatives of polyalkenylsuccinimides
    Patent number: 5211834
    Abstract: Polyalkenylsuccinimide-boron compound reaction products are used as effective antifoulants in liquid hydrocarbonaceous mediums, such as crude oils and gas oils, during processing of such liquids at elevated temperatures. The reaction products are formed via a two-step reaction in which a polyalkenylsuccinic anhydride precursor is reacted with an amine to form polyalkenylsuccinimide intermediate which, in turn, is reacted with a boron compound.
    Type: Grant
    Filed: January 31, 1992
    Date of Patent: May 18, 1993
    Assignee: Betz Laboratories, Inc.
    Inventor: David R. Forester
  • Use of reaction products of partially glycolated polyalkenyl succinimides and diisocyanates as antifoulants in hydrocarbon process media
    Patent number: 5211835
    Abstract: Partially glycolated polyalkenylsuccinimide-diisocyanate reaction products are used as effective antifoulants in liquid hydrocarbonaceous mediums, such as crude oils and gas oils, during processing of such liquids at elevated temperatures. The reaction products are formed via a three-step reaction in which a polyalkenylsuccinic anhydride precursor is reacted with an amine to form polyalkenylsuccinimide intermediate which, in turn, is reacted with glycolic acid to form a partially glycolated bis-alkenyl succinimide, followed by adding a diisocyanate to the succinimide.
    Type: Grant
    Filed: March 10, 1992
    Date of Patent: May 18, 1993
    Assignee: Betz Laboratories, Inc.
    Inventor: David R. Forester
  • Method for simultaneously cleaning, decolorizing and thermally disinfecting contact lenses
    Patent number: 5209783
    Abstract: A method for removing yellow contact lens discoloration involves immersing yellow colored contact lenses in a solution including a proteolytic enzyme and a reducing agent and then heating the solution for a time and at a temperature sufficient to remove substantially all yellow contact lens discoloration. The method also functions to simultaneously clean, disinfect and remove yellow discoloration from a contact lens. The lens is immersed in an aqueous solution including an effective amount of a thiol and an enzyme, and the solution is heated above ambient temperature for a time and at a temperature sufficient to remove substantially all yellow contact lens discoloration and contact lens protein accretions and to disinfect the lens. Preferably the solution is heated to a maximum temperature in a range of approximately 80.degree. C. to approximately 90.degree. C.
    Type: Grant
    Filed: January 3, 1992
    Date of Patent: May 11, 1993
    Assignee: Allergan, Inc.
    Inventors: Stanley W. Huth, Sam W. Lam, Abraham M. Espiritu
  • Non-chlorinated solvent dewax process
    Patent number: 5209785
    Abstract: The method involves removing wax from a substrate using a non-chlorinated solvent process. The substrate is dipped in a hot wax bath or heated in an oven to remove substantially all of the wax. The substrate is then submerged in either a single or a series of hot mineral oil baths to remove any remaining wax. The oil is then removed by a semi-aqueous or light organic cleaner. The semi-aqueous cleaner is subsequently removed in an alkaline-base cleaner bath. Following the alkaline-base cleaner is a cleansing with a rinsing solution preferably a countercurrent series of rinses. Finally, the substrate is dried.
    Type: Grant
    Filed: October 30, 1991
    Date of Patent: May 11, 1993
    Assignee: United Technologies Corporation
    Inventors: Susan Brewe, Robert W. Dean, Mark R. Jaworski, Timothy J. Lorette, Louis L. Packer, John P. Zavodjancik
  • Method of removing hydroperoxides from lubricating oils using sodium hydroxide and a metal thiophosphate
    Patent number: 5209839
    Abstract: NaOH can be used to remove hydroperoxides from a lubricating oil provided the oil contains a metal thiophosphate. This extends the useful life of the oil and the equipment being lubricated. In a preferred embodiment, the NaOH is immobilized within the lubrication system of an internal combustion engine.
    Type: Grant
    Filed: March 5, 1992
    Date of Patent: May 11, 1993
    Assignee: Exxon Research and Engineering Co.
    Inventors: Harold Shaub, Darrell W. Brownawell, Arthur DiBenedetto
  • Purification of an oil-containing liquid using a surface treated permeable inorganic membrane
    Patent number: 5209838
    Abstract: A process is described for purifying an oil-containing liquid to remove aqueous and solid impurities which comprises passing said liquid through a permeable inorganic membrane previously treated by contacting the membrane with an organic reactant selected from the group consisting of a phosphonic acid, a phosphinic acid, a monocarboxylic acid, a dicarboxylic acid, a boronic acid, a phosphoric acid ester and a precursor which decomposes upon contact with said inorganic membrane to form one of said organic reactants whereby the treated membrane is capable of separating aqueous and solid impurities from hydrocarbons in the oil-containing liquid.
    Type: Grant
    Filed: October 7, 1991
    Date of Patent: May 11, 1993
    Assignee: Aluminum Company of America
    Inventors: William C. Sleppy, Larry F. Wieserman, Kenneth M. Thomas, Kenneth P. Goodboy
  • Process for the recovery and separation of tantalum and niobium
    Patent number: 5209910
    Abstract: Improved solvent extraction recovery of tantalum and niobium oxides from an acid solution of raw materials containing such oxides wherein the charged organic solvent [e.g., MIBK] is washed out (a) with 8-16N sulfuric acid and then (b) with water or dilute HF. This avoids the use of a second mineral acid addition after digestion by HF of raw materials (and avoids problems attendant to use a second mineral acid).
    Type: Grant
    Filed: June 24, 1991
    Date of Patent: May 11, 1993
    Assignee: Hermann C. Starck GmbH & Co. KG
    Inventors: Walter Bludssus, Joachim Eckert
  • Method of making metal stannates
    Patent number: 5209911
    Abstract: The present invention describes a method of making metal stannates by reacting a solid metal oxide, hydroxide or carbonate with an aqueous stannate solution and recovering the precipitated metal stannate, the solid component being added in an amount which is stoichiometrically not substantially more then the amount of tin.
    Type: Grant
    Filed: February 27, 1992
    Date of Patent: May 11, 1993
    Assignee: Alcan International Limited
    Inventor: David J. Randall
  • Process for producing an inorganic barium-containing solids composition
    Patent number: 5207997
    Abstract: The processing of leaching residues from barium sulfide leaching is described. Sodium sulfide as well as a solid which is useful as an additive for fired clay products, particularly bricks, are obtained as valuable reaction products.
    Type: Grant
    Filed: December 20, 1990
    Date of Patent: May 4, 1993
    Assignee: Kali-Chemie AG
    Inventor: Jacopo Porta
  • Acid leaching of copper ore heap with fluoroaliphatic surfactant
    Patent number: 5207996
    Abstract: Improved methods of heap leaching of copper ore with aqueous sulfuric acid solutions comprising a fluoroaliphatic surfactant are disclosed. The fluoroaliphatic surfactant increases the amount of copper values leached and recovered.
    Type: Grant
    Filed: October 10, 1991
    Date of Patent: May 4, 1993
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Michael J. Sierakowski, Frank A. Lee
  • Recovery of cerium from fluoride-containing ores
    Patent number: 5207995
    Abstract: Recovery of cerium values from fluoride-containing ores such as bastnasite is enhanced. The ore is ground, roasted, and leached with dilute hydrochloric acid to produce an ore concentrate. The concentrate is treated with a solution of hydrochloric acid and boric acid to solubilize cerium values and convert fluoride to tetrafluoroborate ion. Tetrafluoroborate is removed from the solution, e.g., by precipitation, and the solution is further processed for recovery of cerium values. Removal of tetrafluoroborate avoids loss of cerium as insoluble cerium tetrafluorborate during said further processing.
    Type: Grant
    Filed: September 19, 1990
    Date of Patent: May 4, 1993
    Assignee: Union Oil Company of California
    Inventor: Paula J. Bosserman
  • Method of disposal of hot water soluble garments and like fabrics
    Patent number: 5207837
    Abstract: A method of disposing of garments after use. The garments, linens, drapes, towels and other useful articles are provided as woven, non-woven, knitted or otherwise formed fabric of thermoplastic polyvinyl alcohol polymer fiber, the fiber being water soluble only at temperatures above approximately 37.degree. C. and preferably above 50.degree. C. After use, the fabric is subjected to water at a sufficient temperature to substantially dissolve the fabric whereupon the water and dissolved fabric are subjected to disposal.
    Type: Grant
    Filed: May 12, 1992
    Date of Patent: May 4, 1993
    Inventor: Travis W. Honeycutt
  • Cleaning process for removal of deposits from the susceptor of a chemical vapor deposition apparatus
    Patent number: 5207836
    Abstract: An improved process is disclosed for the removal of deposits such as tungsten or tungsten silicide from a susceptor in a vacuum deposition chamber without leaving fluorine residues by first flowing a gaseous source of fluorine into a vacuum deposition chamber and igniting a plasma in the chamber while the gaseous source of fluorine is flowing therein to remove the depositions followed by flowing a gaseous source of hydrogen into the chamber and maintaining a plasma in the chamber during the flow of the gaseous source of hydrogen to remove any fluorine residues from the chamber.
    Type: Grant
    Filed: June 3, 1992
    Date of Patent: May 4, 1993
    Assignee: Applied Materials, Inc.
    Inventor: Mei Chang
  • Removal of aromatic color bodies from aromatic hydrocarbon streams
    Patent number: 5207894
    Abstract: This invention provides a process to remove aromatic color bodies, particularly oxygen or sulfur containing aromatics from a C.sub.8-11 aromatic hydrocarbon stream having a boiling range between about 160.degree.-460.degree. F. The process involves contacting the hydrocarbon stream with a neutral attapulgite clay for a time sufficient to adsorb the aromatic color bodies. The process is effective in reducing the APHA color value of the subject hydrocarbon stream from an initial 850-1100 value to about 400 or less.
    Type: Grant
    Filed: October 11, 1991
    Date of Patent: May 4, 1993
    Assignee: Lyondell Petrochemical Company
    Inventors: Stewart H. Presnall, Robert J. Haynal, Beverly B. Slimp, Jr., Martin P. Grosboll, Pamela A. Yanchik