Patents Examined by Delbert E. Gantz
  • Used oil re-refining
    Patent number: 4512878
    Abstract: Used oils, especially used lubricating oils which are normally considered waste and are discarded or burned, are reclaimed for reuse by a re-refining procedure involving the steps of:(a) heat soaking the used oil;(b) distilling the heat soaked oil;(c) passing the distillate through a guard bed of activated material;(d) hydrotreating the guard bed treated distillate under standard hydrotreating conditions.If the used oil to be re-refined contains a quantity of water and/or fuel fraction which the practioner considers sufficiently large to be detrimental, the used oil may be subjected to a dewatering/defueling step prior to being heat soaked.
    Type: Grant
    Filed: February 16, 1983
    Date of Patent: April 23, 1985
    Assignee: Exxon Research and Engineering Co.
    Inventors: Lloyd E. Reid, Keith C. Yao, Douglas G. Ryan
  • Process for extracting bitumen from tar sands
    Patent number: 4512872
    Abstract: This invention provides a process for the recovery of bitumen from mined tar sands that comprises admixing mined tar sands with a hydrocarbon liquid such as light crude oil or a mixture of light crude oils from a nearby reservoir thereby obtaining a bitumen-hydrocarbon mixture mixed with sand, separating the bulk of said bitumen-hydrocarbon mixture from the sand as a liquid, and recovering the remainder of the bitumen-hydrocarbon mixture using chemical waterflooding techniques.
    Type: Grant
    Filed: February 16, 1984
    Date of Patent: April 23, 1985
    Assignee: Mobil Oil Corporation
    Inventors: Harold S. Chung, Joseph J. Dickert, Jr.
  • Cracking of crude oils with carbon-hydrogen fragmentation compounds over non-zeolitic catalysts
    Patent number: 4512875
    Abstract: The process for increasing the production of petrochemical conversion processes in the presence of a carbon-hydrogen fragmentation compound in the presence of a non-zeolitic molecular sieve.
    Type: Grant
    Filed: May 2, 1983
    Date of Patent: April 23, 1985
    Assignee: Union Carbide Corporation
    Inventors: Gary N. Long, Regis J. Pellet, Jule A. Rabo
  • Minimizing corrosion in coal liquid distillation
    Patent number: 4511460
    Abstract: In an atmospheric distillation tower of a coal liquefaction process, tower materials corrosion is reduced or eliminated by introduction of boiling point differentiated streams to boiling point differentiated tower regions.
    Type: Grant
    Filed: March 21, 1984
    Date of Patent: April 16, 1985
    Assignee: International Coal Refining Company
    Inventors: Kenneth L. Baumert, Alberto A. Sagues, Burtron H. Davis
  • Process for continuous production of optically anisotropic pitch
    Patent number: 4511456
    Abstract: A continuous process for producing an optically anisotropic pitch. A reaction tank is used to treat a starting material. An upper section is utilized for thermal decomposition polycondensation zone. A lower portion of the tank is used as a settling zone.
    Type: Grant
    Filed: February 17, 1983
    Date of Patent: April 16, 1985
    Assignee: Toa Nenryo Kogyo Kabushiki Kaisha
    Inventor: Takayuki Izumi
  • Low activity catalyst oligomerization process
    Patent number: 4511746
    Abstract: A process for the pure oligomerization of C.sub.2 -C.sub.6 alkenes over low hydrogen transfer activity molecular sieves is disclosed.
    Type: Grant
    Filed: September 25, 1981
    Date of Patent: April 16, 1985
    Assignee: Chevron Research Company
    Inventor: Stephen J. Miller
  • Process for producing alkylbenzenes
    Patent number: 4511748
    Abstract: A process is disclosed for producing alkylbenzenes by the alkylation of aromatic hydrocarbons with olefins. High reactivity and selectivity are afforded by the use of a catalyst comprising sodium and/or sodium amide deposited on a carrier represented by the formula K.sub.2 O. x Al.sub.2 O.sub.3 where x is 0.5.ltoreq.x.ltoreq.11.
    Type: Grant
    Filed: May 23, 1984
    Date of Patent: April 16, 1985
    Assignee: Nippon Oil Co., Ltd.
    Inventors: Michio Kudoh, Mitsuo Matsuno, Hirosuke Imai
  • Selective removal of vinylidene olefin from olefin mixtures
    Patent number: 4511753
    Abstract: Vinylidene olefins are selectively removed from a mixture of olefins containing vinylidene olefins by reacting the mixture with either hydrogen sulfide or a hydrocarbyl mercaptan and then distilling the resultant mixture to obtain a substantially vinylidene olefin-free product.
    Type: Grant
    Filed: January 16, 1984
    Date of Patent: April 16, 1985
    Assignee: Ethyl Corporation
    Inventors: R. Scott Smith, Gerald Z. Smith, Jr.
  • Heavy oil process with hydrodemetallation, hydrovisbreaking and hydrodesulfuration
    Patent number: 4511458
    Abstract: A process for conversion of an asphaltenes-containing heavy oil or heavy oil fraction to lighter fractions comprises 3 steps of: catalytic hydrodemetallation, hydrovisbreaking and catalytic hydrodesulfuration.
    Type: Grant
    Filed: December 30, 1983
    Date of Patent: April 16, 1985
    Assignee: Institut Francais du Petrole
    Inventors: Alain Billon, Yves Jacquin, Jean-Pierre Peries, Herve Toulhoat
  • Catalyst for reforming of methanol and process of preparing same
    Patent number: 4511673
    Abstract: A catalyst for reforming CH.sub.3 OH to H.sub.2 and CO, which is high in activity, selectivity and durability. The catalyst uses a granular or monolithic carrier which is made of active alumina at least in its surface regions, and compound oxide(s) of perovskite structure MAlO.sub.3, where M is a metal selected from the rare earth elements, e.g. La or Ce, or from the titanium family elements, e.g. Ti or Zr, and catalytic metal(s) of the platinum group, e.g. Pt, Pd and/or Rh, are deposited on the carrier. Preferably the amount of the metal(s) M in the compound oxide(s) is 0.1-10.0 Wt % of the carrier, and the content of the metal(s) of the platinum group in the catalyst is 0.1 to 1.0 Wt %.
    Type: Grant
    Filed: March 24, 1983
    Date of Patent: April 16, 1985
    Assignee: Nissan Motor Co., Ltd.
    Inventor: Yoshiyuki Eto
  • Catalyst and reverse disproportionation process
    Patent number: 4511672
    Abstract: A catalyst containing tungsten, potassium, and bismuth on a support, preferably silica gel, is disclosed which is useful in reverse disproportionation of stilbene and ethylene to produce styrene.
    Type: Grant
    Filed: January 16, 1984
    Date of Patent: April 16, 1985
    Assignee: Monsanto Company
    Inventor: Charles F. Hobbs
  • Light olefin conversion to heavier hydrocarbons with sorption recovery of unreacted olefin vapor
    Patent number: 4511747
    Abstract: In the conversion of light olefins to heavier hydrocarbons, an improved recovery technique is provided for selectively removing unreacted light olefins from a catalytic reactor effluent. This system is useful in converting ethene-rich feedstocks to gasoline and/or distillate products, particularly in oligomerization processes employing shape selective siliceous catalysts such as ZSM-5 type zeolites. By recycling gasoline-range hydrocarbons as a sorbent liquid, unreacted C.sub.2.sup.+ components may be absorbed from reactor effluent vapor and returned for further contact with the catalyst.
    Type: Grant
    Filed: February 1, 1984
    Date of Patent: April 16, 1985
    Assignee: Mobil Oil Corporation
    Inventors: Bernard S. Wright, Chung H. Hsia, Hartley Owen
  • Process for the hydroisomerization of paraffins
    Patent number: 4511752
    Abstract: A process is disclosed for the preparation of a more active paraffin hydrocarbon hydroisomerization catalyst from synthetic mica montmorillonite, preferably a nickel synthetic mica montmorillonite catalyst, which may also contain palladium, by treating the catalyst with one or more compounds comprising chlorine which can further release one or more protons and/or hydrogen chloride, and preferably by treating with hydrochloric acid.
    Type: Grant
    Filed: April 20, 1983
    Date of Patent: April 16, 1985
    Assignee: Shell Oil Company
    Inventor: Jacobus J. L. Heinerman
  • Method for minimizing fouling of heat exchanger
    Patent number: 4511457
    Abstract: Hydrocarbon processing equipment is protected against fouling during the processing of hydrocarbons at elevated temperatures by adding to the equipment small amounts of the N,N'-dimer of phenothiazine and at least one mono- or ditertiary alkyl catechol and/or at least one mono- or ditertiary alkylhydroquinone.
    Type: Grant
    Filed: August 10, 1984
    Date of Patent: April 16, 1985
    Assignee: Atlantic Richfield Company
    Inventors: Richard F. Miller, Michael P. Nicholson
  • Simultaneous coking of residual oil and partial gasification and desulfurization of coal
    Patent number: 4511459
    Abstract: Coking of residual oil and devolatization/partial gasification and desulfurization of solid particulate fuel are carried out in a single reactor. The particulate fuel is burned in a combustion zone in the bottom of the reactor. A bed of particulate fuel is fluidized above the combustion zone with gases rising from the combustion zone. The fluidized bed is maintained at a temperature which cokes the residual oil and volatizes the particulate fuel. A high temperature, low velocity zone is maintained between the combustion zone and the fluidized bed for calcination and desulfurization of the solid fuel.
    Type: Grant
    Filed: July 11, 1983
    Date of Patent: April 16, 1985
    Assignee: Mobil Oil Corporation
    Inventors: Tsoung Y. Yan, Paul Shu
  • Hydrocarbon dehydrogenation
    Patent number: 4511754
    Abstract: A method for dehydrogenating dehydrogenatable hydrocarbons which comprises contacting hydrocarbon with an oxide of Tb having combined therewith an amount of alkali and/or alkaline earth metal which is sufficient to improve the selectivity to dehydrogenated hydrocarbon products. The oxide is reduced by the contact which is carried at about 500.degree. to 1000.degree. C. Reducible oxides of Tb are regenerated by oxidizing the reduced composition with molecular oxygen. Solids prepared from the oxide Tb.sub.4 O.sub.7 are particularly effective in the process.
    Type: Grant
    Filed: April 16, 1984
    Date of Patent: April 16, 1985
    Assignee: Atlantic Richfield Company
    Inventor: Anne M. Gaffney
  • Corrosion inhibition when distilling coal liquids by adding cresols or phenols
    Patent number: 4511453
    Abstract: Fractionation apparatus material corrosion in a coal liquefaction system is reduced by addition of compounds having a pK.sub.b <6 to tower feed streams or to the tower itself.
    Type: Grant
    Filed: March 21, 1984
    Date of Patent: April 16, 1985
    Assignee: International Coal Refining Company
    Inventors: Kenneth L. Baumert, Alberto A. Sagues, Burtron H. Davis
  • Conversion of methanol to toluene using amorphous silica-alumina catalysts
    Patent number: 4511749
    Abstract: Amorphous silica-alumina catalysts, having a layer of an aluminum compound chemically bonded onto the surface of a silica xerogel and having protons as the electrical charge balancing species, have been found to give surprising selectivity in the conversion of water/methanol mixtures to toluene.
    Type: Grant
    Filed: November 22, 1983
    Date of Patent: April 16, 1985
    Assignee: Coal Industry Patents Limited
    Inventors: Joseph G. Robinson, Pierce W. F. Riemer
  • High viscosity index synthetic oils and synthesis thereof
    Patent number: 4510342
    Abstract: A method for preparing synthetic oils characterized by a high viscosity index and prepared from 1-olefin is described. The method comprises polymerizing a 1-olefin or a mixture of 1-olefins in the presence of(a) at least one transition metal halide catalyst,(b) at least one alkyl aluminum compound containing up to about 15 carbon atoms in each alkyl group and up to about 40 carbon atoms per molecule as a co-catalyst, and(c) a saturated alkyl fluoride.The homopolymers and copolymers prepared in accordance with the method of the invention generally are characterized by a high viscosity index such as between about 100 to 300. The homopolymers and copolymers are useful as synthetic lubricants and as additives to synthetic or mineral oil lubricants for modifying the viscosity index characteristics of the lubricants.
    Type: Grant
    Filed: December 29, 1982
    Date of Patent: April 9, 1985
    Assignee: The Standard Oil Company
    Inventors: Janie K. Currie, J. Robert Mooney
  • Method for minimizing fouling of heat exchanger
    Patent number: 4510041
    Abstract: Hydrocarbon processing equipment is protected against fouling during the processing of hydrocarbons at elevated temperatures by adding to the equipment small amounts of at least one N,N'-dimer of phenothiazine or a substituted phenothiazine and at least one mono- or ditertiary alkylphenol.
    Type: Grant
    Filed: August 10, 1984
    Date of Patent: April 9, 1985
    Assignee: Atlantic Richfield Company
    Inventors: Richard F. Miller, Michael P. Nicholson