Patents Examined by Curtis R. Davis
  • Patent number: 5177288
    Abstract: Polybutene is prepared from a mixed C.sub.4 hydrocarbon feedstream using an organo-aluminum/HCl catalyst system wherein the HCl is introduced separately into the feedstream to form organochloride in the feedstream. Polybutene product having a very narrow molecular weight distribution is obtained over the M.sub.n range of 700 to 3,000. Dispersants derived from this polybutene exhibit substantially improved performance in lubricating oil compositions.
    Type: Grant
    Filed: June 15, 1990
    Date of Patent: January 5, 1993
    Assignee: Exxon Chemical Patents Inc.
    Inventor: Frank J. Chen
  • Patent number: 5171923
    Abstract: A process for purifying linear paraffins in which a hydrocarbon feedstream containing linear paraffins contaminated with aromatics, sulfur-, nitrogen-, and oxygen-containing compounds, and color bodies, and also containing up to about 5 wt % desorbent from effluent recycle, is contacted with a solid adsorbent such as a NaX zeolite or zeolite MgY; after adsorption the adsorbent is desorbed with an alkyl-substituted aromatic desorbent, such as toluene. As the adsorent bed is being desorbed, the initial effluent from the adsorption cycle will contain levels of desorbent and may be recycled to the hydrocarbon feedstream. Previous to the removal of impurities from the adsorbent by desorption, the desorbent displaces interstitial linear paraffins which are also recycled to the hydrocarbon feedstream.
    Type: Grant
    Filed: October 23, 1990
    Date of Patent: December 15, 1992
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Charles T. Dickson, Janet R. Fitzke, Christopher L. Becker
  • Patent number: 5171423
    Abstract: A catalytic cracking process is provided for cost effectively separating and stripping hydrocarbon from catalyst while limiting the occurrence of undesired catalytic overcracking and thermal cracking reactions. The process includes the steps of contacting feed with catalyst, grossly separating the larger coked catalyst particles from the hydrocarbon, disengaging the smaller coked catalyst fines from the hydrocarbon, removing volatile hydrocarbon from the grossly separated and disengaged catalyst, and recycling the volatile hydrocarbon back to the gross separating step. The disengager step includes the steps of dampening the flow of grossly separated hydrocarbon and internally cyclone separating the smaller catalyst fines from the hydrocarbon product.
    Type: Grant
    Filed: May 25, 1990
    Date of Patent: December 15, 1992
    Assignee: Amoco Corporation
    Inventor: Larry W. Kruse
  • Patent number: 5158671
    Abstract: A method is described for rendering total liquid product hydroisomerates daylight stable and improving their oxidation stability, which method involves treating the hydroisomerate total liquid product with a Group VIII metal on refractory metal oxide catalyst or Group VIII metal on halogenated refractory metal oxide catalyst under mild conditions, which conditions are a temperature in the range of 170.degree. to 270.degree. C., a pressure in the range of 300 to 1500 psi H.sub.2, 0.25 to 10 v/v/hr and 500 to 10,000 SCF/B,H.sub.2.
    Type: Grant
    Filed: December 13, 1988
    Date of Patent: October 27, 1992
    Assignee: Exxon Research and Engineering Company
    Inventors: Ian A. Cody, Donald T. Eadie, John M. MacDonald, Glen P. Hamner
  • Patent number: 5137580
    Abstract: Ultrasonic waves of a low frequency and a high frequency are alternately emitted from one vibrator to liquid in a tank, cavitation generated due to the ultrasonic wave of the low frequency is eliminated and changed to small cavitation for forming the next large cavitation due to the ultrasonic wave of the high frequency and next the ultrasonic wave of the low frequency is emitted to the liquid in a tank and large cavitation is formed, whereby the cleaning effect is improved.
    Type: Grant
    Filed: November 13, 1989
    Date of Patent: August 11, 1992
    Assignee: Honda Electronics Co., Ltd.
    Inventor: Keisuke Honda
  • Patent number: 5135639
    Abstract: A process combination is disclosed to reduce the aromatics content of a key component of gasoline blends. Paraffins contained in catalytic reformates are conserved and upgraded by separation and isomerization, reducing the reforming severity required to achieve a given product octane with concomitant reduction in paraffin aromatization and cracking. Light reformate may be separated and isomerized, and heavier paraffins are separated from the reformate by solvent extraction or adsorption and isomerized. A gasoline component having a reduced aromatics content relative to reformate of the same octane number is blended from the net products of the separation and isomerization steps.
    Type: Grant
    Filed: May 24, 1990
    Date of Patent: August 4, 1992
    Assignee: UOP
    Inventors: Robert J. Schmidt, Srikantiah Raghuram
  • Patent number: 5124500
    Abstract: A process for the removal of hydrogen from a mixture of hydrogen and one or more organic compounds, which comprises contacting the mixture with a molecular sieve containing a reducible metal cation, said molecular sieve being selectively permeable to hydrogen.
    Type: Grant
    Filed: July 31, 1990
    Date of Patent: June 23, 1992
    Assignee: Shell Oil Company
    Inventors: David M. Clark, Pierre E. Dejaifve, Christopher S. John, Jaydeep Biswas, Ian E. Maxwell
  • Patent number: 5120896
    Abstract: This invention relates to a process for the concurrent isomerization and disproportionation of hydrocarbon olefins by contacting said hydrocarbon at disproportionation conditions with a catalyst comprising an inorganic oxide matrix, a ferrierite compound, and a heavy metal selected from the group consisting of molybdenum, tungsten, rhenium and mixtures thereof.
    Type: Grant
    Filed: December 21, 1989
    Date of Patent: June 9, 1992
    Assignee: Shell Oil Company
    Inventors: Richard A. Kemp, David M. Hamilton, Jr.
  • Patent number: 5118876
    Abstract: A process for the separation of 2,4 DCP from a hydrocarbon feed mixture comprising 2,4 and 2,6 DCP which process employs an adsorbent comprising a type X or type L zeolite which has been cation exchanged at appropriate conditions with one or more cations selected from the group consisting of alkaline metals, alkaline earths and Group VIII elements of the Periodic Table. The adsorbed DCP isomer(s) thereafter is removed from the adsorbent by contacting it with a desorbent material and is recovered to an extract product stream, likewise the remainder of the feed material is recovered to a raffinate product stream. In a preferred embodiment the process uses a simulated moving-bed countercurrent flow system.
    Type: Grant
    Filed: January 18, 1989
    Date of Patent: June 2, 1992
    Inventors: Hermann A. Zinnen, Kelly C. Issa
  • Patent number: 5109139
    Abstract: A process for purifying linear paraffins in which a hydrocarbon stream containing linear paraffins contaminated with aromatics, sulfur-, nitrogen-, and oxygen-containing compounds, and color bodies, but essentially free of olefins, is contacted with a solid absorbent such as a NaX zeolite or zeolite MgY. After adsorption the adsorbent is desorbed with an alkyl- substituted aromatic desorbent, such as tuluene. The initial effluent from the adsorb cycle, which will contain a high concentration of residual desorbent, is recycled to a desorbent recovery system. The level of desorbent in the adsorber effluent is monitored on a real time basis until the desorbent level of the adsorber effluent declines from a plateau level, i.e., a 100% plateau level, that correlates with the level of impurities, particularly the aromatic impurities in the feed, which is an indication of aromatics breakthrough, thereby signaling the need to switch the adsorbent beds.
    Type: Grant
    Filed: October 23, 1990
    Date of Patent: April 28, 1992
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Charles T. Dickson, Janet R. Fitzke, Christopher L. Becker
  • Patent number: 5102531
    Abstract: A process for treating a hydrocarbonaceous feed stream containing a non-distillable component to produce a distillable hydrocarbonaceous product and a heavy product comprising the non-distillable component while minimizing thermal degradation of the hydrocarbonaceous feed stream which process comprises the steps of: (a) contacting the hydrocarbonaceous feed stream with a hot first hydrogen-rich gaseous stream having a temperature greater than the hydrocarbonaceous feed stream in a flash zone at flash conditions without indirect heat exchange thereby increasing the temperature of the hydrocarbonaceous feed stream and vaporizing at least a portion thereof to provide a hydrocarbonaceous vapor stream comprising hydrogen and a heavy product comprising the non-distillable component; (b) removing the hydrocarbonaceous vapor stream comprising hydrogen from the flash zone without contacting the vapor stream with hydrocarbonaceous liquid; (c) condensing at least a portion of the hydrocarbonaceous vapor stream comprisin
    Type: Grant
    Filed: October 9, 1990
    Date of Patent: April 7, 1992
    Assignee: UOP
    Inventors: Tom N. Kalnes, Robert B. James, Jr.
  • Patent number: 5095169
    Abstract: The present invention relates to processes for isomerizing normal paraffin hydrocarbons to produce products containing non-normal hydrocarbons using a zeolite beta catalyst that has been activated in order to enhance its catalytic properties. In accordance with the present invention, the zeolite beta catalyst is activated at a temperature effective to substantially reduce the concentration of strong acid species, i.e., hydronium cations, without substantially reducing the concentration of weak acid species, i.e., hydroxoaluminum cations, both of said strong acid species and weak acid species being initially present on the catalyst prior to activation. In addition, the isomerization step is preferably conducted at a temperature at least 300.degree. C. lower than the activation temperature.
    Type: Grant
    Filed: October 11, 1990
    Date of Patent: March 10, 1992
    Assignee: UOP
    Inventors: Gary W. Skeels, Edith M. Flanigen
  • Patent number: 5094737
    Abstract: A fluid coking-gasification process for converting heavy hydrocarbonaceous chargestocks to lower boiling products in which calcium silicate is used to mitigate bogging, slagging, or both. The calcium silicate can be added directly to the heavy hydrocarbonaceous chargestock to mitigate both bogging and slagging or it can be added directly into the gasifier to mitigate slagging.
    Type: Grant
    Filed: October 1, 1990
    Date of Patent: March 10, 1992
    Assignee: Exxon Research & Engineering Company
    Inventors: Roby Bearden, Jr., Tan-Jen Chen, William N. Olmstead
  • Patent number: 5095164
    Abstract: Alkyl tert.-alkyl ethers can be cleaved into the underlying alkanols and tert.-olefins in the presence of strongly acidic substances in a column apparatus, the strongly acidic substance being made available at the foot of the column. A particularly advantageous process design results when a water stream is fed below the top column tray in countercurrent to the tert.-olefin flowing upwards and is taken off again from the column above the bottom circulation; in the case of using an insoluble, strongly acidic substance, the latter is located in a catalyst bed at the foot of the column, and the alkyl tert.-alkyl ether is preferably fed in between the catalyst bed and the bottom circulation evaporator.
    Type: Grant
    Filed: March 7, 1991
    Date of Patent: March 10, 1992
    Assignee: Ec Erdolchemie GmbH
    Inventors: Christian Gabel, Bernhard Schleppinghoff, Hans-Dieter Kohler, Hans-Volker Scheef
  • Patent number: 5093541
    Abstract: Cyclobutarenes are prepared by pyrolyzing a suitable benzene, naphthalene, or pyridine derivative in the presence of an amount of steam effective to substantially reduce the partial pressure of the pyrolyzing compound.
    Type: Grant
    Filed: May 25, 1989
    Date of Patent: March 3, 1992
    Assignee: The Dow Chemical Company
    Inventors: George J. Quarderer, Mark J. Beitz, Fred C. Stone, Patrick M. O'Donnell
  • Patent number: 5087789
    Abstract: In accordance with this invention oligomers are produced by a process comprising contacting propylene, ethylene, or a mixture thereof in a reaction zone, under a reaction temperature within the range of about 130.degree. C. to about 300.degree. C., with a catalyst comprising a chromium component on an aluminophosphate support.
    Type: Grant
    Filed: August 23, 1990
    Date of Patent: February 11, 1992
    Assignee: Phillips Petroleum Company
    Inventors: Max P. McDaniel, M. Bruce Welch, Marvin M. Johnson
  • Patent number: 5082990
    Abstract: A process is disclosed for reducing the concentration of light aromatics, especially benzene, in a refinery stream by catalytic alkylation using an olefin-containing stream in a distillation column.
    Type: Grant
    Filed: November 1, 1990
    Date of Patent: January 21, 1992
    Assignee: Chevron Research and Technology Company
    Inventors: C. Richard Hsieh, A. John Gloyn
  • Patent number: 5076908
    Abstract: This invention makes possible substantially continuous flow of uniformly distributed hydrogen and hydrocarbon liquid across a densely packed catalyst bed to fill substantially the entire volume of a reactor vessel by introducing the fluids as alternate annular rings of gas and liquid at a rate insufficient to levitate the bed and with catalyst selected by a density, shape and size at a design feed rate of liquids and gas to prevent ebulation of the packed bed at the design feed rates. Catalysts are selected by measuring bed expansion in a large pilot plant run with hydrocarbon, hydrogen, and catalyst at the design pressures and flow velocities. The liquid and gas components of the feed flow into the bed in alternate annular rings across the full area of the bed.
    Type: Grant
    Filed: July 19, 1989
    Date of Patent: December 31, 1991
    Assignee: Chevron Research & Technology Company
    Inventors: Bruce E. Stangeland, David C. Kramer, David S. Smith, James T. McCall, Georgieanna L. Scheuerman, Robert W. Bachtel
  • Patent number: 5077447
    Abstract: Carboxylic acids are converted in high yields to olefins or high purity .alpha.-olefins by contacting a mixture of carboxylic acid and a carboxylic acid anhydride in the presence of a Group VIII metal or copper-containing catalyst at a temperature of from about 100.degree. C. to about 300.degree. C.
    Type: Grant
    Filed: September 28, 1990
    Date of Patent: December 31, 1991
    Assignee: Henkel Research Corporation
    Inventors: Joseph A. Miller, Jeffrey A. Nelson, Mike Byrne
  • Patent number: 5073659
    Abstract: A terpene compound having the formula (III) is produced by reacting an allylic halide having the formula (I) with a Grignard reagent having the formula (II) in the presence of anhydrous zinc chloride and a copper compound or an organic zinc halide compound having the formula (IV) in the presence of a copper compound, provided that when A-A is C-C, R' is hydrogen and when A-A is C=C, X is chlorine.
    Type: Grant
    Filed: August 10, 1990
    Date of Patent: December 17, 1991
    Assignee: Eisai Co., Ltd.
    Inventors: Kichisaburo Hamamura, Yutaka Ohnuki, Yukio Narabe, Yoshihiro Hisatake, Takashi Banba, Shizumasa Kijima