Patents Examined by Lance Johnson
  • Patent number: 4677239
    Abstract: Selective and controlled dealumination of an aluminosilicate zeolite is achieved by filling the pore system of the zeolite with a foreign material, for example coke, removing part of the foreign material from the outer portion of the zeolite, for example by heating in a gas stream comprising oxygen, dealuminating the outer portion, and then removing the remainder of the foreign material. Use of such a partially dealuminated zeolite as catalyst in a toluene disproportionation reaction leads to greater selectivity to paraxylene.
    Type: Grant
    Filed: February 19, 1985
    Date of Patent: June 30, 1987
    Assignee: Imperial Chemical Industries PLC
    Inventors: John Dewing, Philip J. Hogan, Allan Stewart
  • Patent number: 4676958
    Abstract: Zeolites are prepared using magadiite as a source of silica.
    Type: Grant
    Filed: March 6, 1985
    Date of Patent: June 30, 1987
    Assignee: Chevron Research Company
    Inventor: Stacey I. Zones
  • Patent number: 4673559
    Abstract: Silicophosphoaluminates are crystallized from a two-phase reaction mixture comprising sources of silicon oxide, aluminum oxide and phosphorus oxide and a suitable directing agent. The silicophosphoaluminates produced have ion exchange properties and are readily convertible to catalytically active material.
    Type: Grant
    Filed: December 21, 1984
    Date of Patent: June 16, 1987
    Assignee: Mobil Oil Corporation
    Inventors: Eric G. Derouane, Roland von Ballmoos
  • Patent number: 4664897
    Abstract: A new crystalline silicophosphoaluminate designated MCM-4 and having a particular crystal strcuture is provided. This crystalline material has ion-exchange properties and is readily convertible to catalytically active material.
    Type: Grant
    Filed: September 16, 1986
    Date of Patent: May 12, 1987
    Assignee: Mobil Oil Corporation
    Inventors: Eric G. Derouane, Roland von Ballmoos
  • Patent number: 4663139
    Abstract: A novel crystalline aluminophosphate of the molecular sieve type, denominated AlPO.sub.4 -39, is prepared by hydrothermal synthesis from reactive sources of aluminum and phosphorus and an organic templating agent.
    Type: Grant
    Filed: December 16, 1985
    Date of Patent: May 5, 1987
    Assignee: Union Carbide Corporation
    Inventors: Stephen T. Wilson, Lisa King
  • Patent number: 4663140
    Abstract: A process of manufacture of a crystalline aluminum silicate is disclosed wherein the aqueous forming solution has augmented thereto both a pyridine compound and a quaternary ammonium hydroxide. The process derives a novel crystalline aluminum silicate composition of matter.
    Type: Grant
    Filed: June 9, 1986
    Date of Patent: May 5, 1987
    Inventors: Willibrord A. Van Erp, Josepha M. E. Seelen-Kruijssen, Tom Huizinga
  • Patent number: 4661240
    Abstract: The sulphur emissive capability, on combustion, of coke which is formed during upgrading of sulphur-containing heavy crude oils, including oil sands bitumen, and residua, is decreased by the addition of calcium carbonate, calcium hydroxide or calcium oxide, in particulate form, to the heavy crude oil prior to coking, and uniformly dispersing the same therein. The presence of the calcium compound leads to an increased yield of liquid distillates from the coking process under the coking conditions. For calcium carbonate, the Ca:S ratio is about 1:5 to 1:1 and the coking temperature is about 400.degree. to 500.degree. C. For calcium hydroxide and calcium oxide, the Ca:S ratio is about 1:3 to 1:1 and the coking temperature is about 450.degree. to about 500.degree. C.
    Type: Grant
    Filed: March 20, 1984
    Date of Patent: April 28, 1987
    Assignee: Alberta Research Council
    Inventors: Michael A. Kessick, Zacharia M. George, Linda G. Schneider
  • Patent number: 4658081
    Abstract: Feed hydrocarbons comprising propane and butanes are cracked to selectively maximize the production of ethylene or propylene by contacting the feed hydrocarbons with a cracking catalyst, adapted to convert the feed hydrocarbons to less saturated hydrocarbons, under conditions sufficient to thus crack the feed hydrocarbons, to thereby selectively maximize the production of ethylene, and, at least intervally, hydrogen sulfide or a hydrogen sulfide precursor is added to the feed hydrocarbons to thereby maximize the production of propylene. Preferred catalysts which may be utilized in the process and which are highly selective to the production of ethylene, as opposed to propylene, (in the absence of hydrogen sulfide or hydrogen sulfide precursor) include mixed oxides of manganese and magnesium, mixed oxides of manganese and Lanthanum Series metal and/or niobium, mixed oxides of iron and magnesium and mixed oxides of iron and Lanthanum Series metal and/or niobium.
    Type: Grant
    Filed: July 25, 1985
    Date of Patent: April 14, 1987
    Assignee: Phillips Petroleum Company
    Inventor: John H. Kolts
  • Patent number: 4658075
    Abstract: A process is provided for converting feedstock comprising aromatic compounds to product comprising aromatic compounds which differs from the feedstock over catalyst prepared by a method for reactivating a catalyst composition comprising a crystalline zeolite material having a silicon/aluminum atomic ratio of at least about 2, said catalyst composition having been deactivated by contact with steam. The catalyst preparation method involves contacting said steam-deactivated catalyst composition with an aluminum compound at elevated temperature, and contacting said aluminum compound contacted catalyst composition with an aqueous acid solution.
    Type: Grant
    Filed: November 12, 1985
    Date of Patent: April 14, 1987
    Assignee: Mobil Oil Corporation
    Inventors: Ralph M. Dessau, George T. Kerr
  • Patent number: 4657749
    Abstract: A zeolite of the L type is prepared by an approximately stoichiometric process wherein the zeolite is crystallized from a reaction mixture aged at from 80.degree. to 260.degree. C. containing specified ranges of molar ratios of KOH (and optionally a minor amount of NaOH), water, potassium silicate, and a source of alumina preferably derived from kaolin or halloysite. Most preferably, the source of alumina is metakaolin.
    Type: Grant
    Filed: May 13, 1986
    Date of Patent: April 14, 1987
    Assignee: Exxon Research and Engineering Company
    Inventor: David E. Vaughan
  • Patent number: 4657748
    Abstract: A synthetic crystalline zeolite is provided characterized by having a composition, in terms of mole ratios of oxides, in the range:0.1 to 0.02 R.sub.2 O:0.90 to 0.98 Na.sub.2 O:Al.sub.2 O.sub.3 :5 to 20 SiO.sub.2 :0 to 8 H.sub.2 Owherein R represents a bis-(2-hydroxyethyl) dimethylammonium group, and characterized by having atoms arranged in a structure as indicated by a specified x-ray powder diffraction pattern. The zeolite may be prepared by crystallization from an aged reaction mixture of an oxide of sodium, a bis-(2-hydroxyethyl) dimethylammonium salt, water, a source of silica, a source of alumina, and sodium aluminosilicate nucleating seeds in specified relative amounts.
    Type: Grant
    Filed: March 18, 1985
    Date of Patent: April 14, 1987
    Assignee: Exxon Research and Engineering Company
    Inventors: David E. W. Vaughan, Karl G. Strohmaier
  • Patent number: 4650655
    Abstract: ZSM-11, ZSM-50 and zeolite beta are effective seeds for the crystallization of ZSM-5.
    Type: Grant
    Filed: July 26, 1984
    Date of Patent: March 17, 1987
    Assignee: Mobil Oil Corporation
    Inventors: Pochen Chu, Rene B. LaPierre
  • Patent number: 4650656
    Abstract: Large crystal aluminosilicate zeolites of the ZSM-5 type, as crystallized having at least one crystalline dimension in excess of about 1 micron are prepared by introducing an alkyl ammonium compound or its precursor into the crystallization mixture under high agitation and controlled conditions of concentration and temperature.
    Type: Grant
    Filed: April 19, 1985
    Date of Patent: March 17, 1987
    Assignee: Mobil Oil Corporation
    Inventors: Francis G. Dwyer, Donald J. Klocke
  • Patent number: 4648965
    Abstract: An improved process for retorting a solid carbonaceous material at elevated temperatures wherein a portion of the spent solids withdrawn from the retort is heated to a temperature within the range from about 1600.degree. F. to about 2400.degree. F. and then recycled to the retort as a source of heat at a temperature within the range from about 650.degree. F. to about 1600.degree. F. When the improved process of this invention is operated in this manner, the amount of liquid product obtained is maximized and the amount of gaseous product minimized. Moreover, the integrity of the particles thus recycled is improved and the amount of fines in the liquid product correspondingly reduced.
    Type: Grant
    Filed: May 1, 1985
    Date of Patent: March 10, 1987
    Assignee: Exxon Research and Engineering Company
    Inventor: Henry G. McMath, Jr.
  • Patent number: 4647442
    Abstract: An improved method of synthesis for a composition comprising crystalline silicophosphoaluminate (MCM-2) is provided. The composition has ion-exchange properties and is readily convertible to catalytically active material. The synthesis method requires two liquid phases comprising a suitable organic or inorganic directing agent and specific reactants, including a specific aluminum phosphate of the ALPO-5 structure.
    Type: Grant
    Filed: August 21, 1984
    Date of Patent: March 3, 1987
    Assignee: Mobil Oil Corporation
    Inventors: Eric G. Derouane, Roland von Ballmoos
  • Patent number: 4647366
    Abstract: The present invention is directed to the use of a reaction product of an alkynediol and a polyalkylene polyamine to control corrosion of metallic surfaces in contact with a substantially anhydrous elevated temperature mixture of a hydrocarbon and propionic acid. The method is particularly useful in controlling the corrosion of overheads in a crude unit of a refinery where problems of this nature are prevalent.
    Type: Grant
    Filed: September 7, 1984
    Date of Patent: March 3, 1987
    Assignee: Betz Laboratories, Inc.
    Inventor: James G. Edmondson
  • Patent number: 4642407
    Abstract: A process is provided for converting oxygenates to hydrocarbons over catalyst prepared by a method for reactivating a catalyst composition comprising a crystalline zeolite material having a silicon/aluminum atomic ratio of at least about 2, said catalyst composition having been deactivated by contact with steam. The catalyst preparation method involves contacting said steam-deactivated catalyst composition with an aluminum compound at elevated temperature, and contacting said aluminum compound contacted catalyst composition with an aqueous acid solution.
    Type: Grant
    Filed: November 12, 1985
    Date of Patent: February 10, 1987
    Assignee: Mobil Oil Corporation
    Inventors: Ralph M. Dessau, George T. Kerr
  • Patent number: 4639358
    Abstract: A new crystalline silicophosphoaluminate designated MCM-1 and having a particular crystal structure is provided. This crystalline material has ion-exchange properties and is readily convertible to catalytically active material.
    Type: Grant
    Filed: December 21, 1984
    Date of Patent: January 27, 1987
    Assignee: Mobil Oil Corporation
    Inventors: Eric G. Derouane, Roland von Ballmoos
  • Patent number: 4639360
    Abstract: This invention relates to a new form of crystalline silicate identified as zeolite ZSM-5, to a new and useful improvement in synthesizing said crystalline silicate and to use of said crystalline silicate prepared in accordance herewith as a catalyst for organic compound, e.g. hydrocarbon compound, conversion.
    Type: Grant
    Filed: October 28, 1985
    Date of Patent: January 27, 1987
    Assignee: Mobil Oil Corporation
    Inventor: Ernest W. Valyocsik
  • Patent number: 4639357
    Abstract: A new crystalline silicophosphoaluminate designated MCM-5 and having a particular crystal structure is provided. This crystalline material has ion-exchange properties and is readily convertible to catalytically active material.
    Type: Grant
    Filed: December 21, 1984
    Date of Patent: January 27, 1987
    Assignee: Mobil Oil Corporation
    Inventors: Eric G. Derouane, Roland von Ballmoos