Patents Represented by Attorney Alexander J. McKillop
  • Patent number: 5601787
    Abstract: An apparatus for multistage, hot stripping of spent FCC catalyst in a regenerator having a stripper supported by the regenerator is disclosed. A secondary stripper, under the conventional primary stripper, is heated indirectly by immersion in a dense bed of hot regenerated catalyst, or heat exchange with a dilute phase transport riser encompassing the primary stripper standpipe and secondary stripper, or by direct contact heat exchange with added hot regenerated catalyst. Vapor from the secondary stripper passes through the primary stripper without contacting spent catalyst in the primary stripper.
    Type: Grant
    Filed: June 4, 1992
    Date of Patent: February 11, 1997
    Assignee: Mobil Oil Corporation
    Inventors: Hartley Owen, Paul H. Schipper
  • Patent number: 5576355
    Abstract: A method of inhibiting viruses in which a virus is contacted with diamondoid alcohol, ketone, ketone derivative, adamantyl amino acid, quaternary salt or combinations thereof which have antiviral properties. These diamondoid derivatives are shown to have antiviral activity against HIV.
    Type: Grant
    Filed: December 15, 1993
    Date of Patent: November 19, 1996
    Assignee: Mobil Oil Corp.
    Inventors: Catherine S. H. Chen, Dong-ming Shen
  • Patent number: 5539076
    Abstract: Resins which are in situ catalytically produced blends of broad bimodal molecular weight distribution ethylene resin are produced. The resins of the invention are characterized by a blend of low molecular weight component and high molecular weight component with HMW component weight fraction which is greater than 0 (zero). Generally, the LMW/HMW weight fraction can be controlled within a very broad range. The resin has a molecular weight distribution, which is characterized as MFR or Mw/Mn. The bimodal molecular weight resins can be processed into films on existing equipment, and exhibit good processability in blown film production and provide film product of excellent FQR. The resin of the invention exhibits reduced tendency towards die-lip buildup and smoking in on-line operations.
    Type: Grant
    Filed: February 15, 1995
    Date of Patent: July 23, 1996
    Assignee: Mobil Oil Corporation
    Inventors: Thomas E. Nowlin, Sandra D. Schregenberger, Pradeep P. Shirodkar, Grace O. Tsien
  • Patent number: 5538696
    Abstract: Horizontal, small diameter cyclones are disclosed. Gas and fines are added tangentially around a clean vapor outlet tube in a cylindrical cyclone. A vortex of solids and some gas passes into a contiguous and axially aligned cylindrical vortex containment means from which solids are withdrawn via a horizontal slot. 0-5 micron particle removal is enhanced. An FCC process uses the cyclones as a third stage separator. An alternative design uses a half pipe extension on the solids outlet to confine the vortex of solids and gas.
    Type: Grant
    Filed: May 2, 1994
    Date of Patent: July 23, 1996
    Assignee: Mobil Oil Corporation
    Inventors: Michael F. Raterman, Christopher G. Smalley
  • Patent number: 5531884
    Abstract: A fluidized catalytic cracking (FCC) process and apparatus uses a catalyst stripper with slant trays or shed trays having "downcomers". Downcomers, vertical catalyst/gas contacting elements, provide a vertical, countercurrent region for catalyst/stripping vapor contact. The downcomers improve stripping effectiveness.
    Type: Grant
    Filed: August 3, 1994
    Date of Patent: July 2, 1996
    Assignee: Mobil Oil Corporation
    Inventors: David L. Johnson, Richard C. Senior
  • Patent number: 5529706
    Abstract: Tolyltriazole derived esters of tri, tetra, and poly carboxylic acids or an acid generating compound have been found to be effective lubricity additives for lube oils, greases, or distillate fuels.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: June 25, 1996
    Assignee: Mobil Oil Corporation
    Inventors: Liehpao O. Farng, Andrew G. Horodysky, Lloyd A. Nelson
  • Patent number: 5530072
    Abstract: Invention process substantially improves the modification efficiency of peroxides through proper selection of anti-oxidant additives and extrusion environment.
    Type: Grant
    Filed: April 19, 1995
    Date of Patent: June 25, 1996
    Assignee: Mobil Oil Corporation
    Inventor: Pradeep P. Shirodkar
  • Patent number: 5525678
    Abstract: A bimetallic catalyst produces broad or bimodal molecular weight distribution polyolefin resin whose composition depends on the ratio of the concentration of the two metals of the catalyst producing the HMW and LMW components. The bimetallic catalyst produces a broad/bimodal MWD resin whose HMW and LMW components depend on the relative productivity of each of the transition metal sites of the catalyst. Water and/or carbon dioxide are cofed to the polymerization reactor at levels necessary to modify the weight fractions of the HMW and LMW components, thus achieving a target molecular weight distribution, MWD. The invention allows the resin MWD to be adjusted in the reactor. The weight fraction of the high molecular weight component decreases with the addition of the water and or the carbon dioxide and the FI of the overall product increases with a decrease in the HMW component weight fraction in the product.
    Type: Grant
    Filed: September 22, 1994
    Date of Patent: June 11, 1996
    Assignee: Mobil Oil Corporation
    Inventors: Robert I. Mink, Thomas E. Nowlin, Pradeep P. Shirodkar, Sandra D. Schregenberger, Grace O. Tsien
  • Patent number: 5523511
    Abstract: A process is disclosed for the highly selective skeletal isomerization of linear olefin-containing organic feeds to iso-olefins at high levels of feed conversion wherein linear olefins, e.g., n-butenes, are contacted with catalyst comprising ZSM-35 under skeletal isomerization conditions which can include temperatures of 100.degree. to 750.degree. C. and linear olefin space velocities of less than 30 WHSV. The process uses a catalyst composition comprising 5 to 40 wt % ZSM-35, and 60 to 95 wt % inorganic oxide matrix, e.g., silica.
    Type: Grant
    Filed: April 18, 1994
    Date of Patent: June 4, 1996
    Assignee: Mobil Oil Corporation
    Inventors: Claus-Peter Haelsig, Albin Huss, Jr., Donald J. Klocke, Daria N. Lissy, Iraj I. Rahmim
  • Patent number: 5520799
    Abstract: This invention is a process for the upgrading of distillate feeds. A batch of supported hydroprocessing catalyst is placed in a reaction zone, which is usually a fixed bed reactor. The hydroprocessing catalyst comprises an effective amount of a noble metal or metals and has a specific activity. Both low aromatic diesel and jet fuel may be produced in separate blocks over the same catalyst batch, using different feeds and often different conditions. The activity of the catalyst is restored each time the feed is switched. When production is switched from jet fuel to low aromatics diesel, activity may be regained more quickly by holding the catalyst at a higher temperature than the reaction temperature for a specific period of time prior to dropping the temperature to the reaction temperature. Switching from one feed to the other may continue for about one year before the catalyst batch is changed. A dual catalyst system may alternatively be employed.
    Type: Grant
    Filed: September 20, 1994
    Date of Patent: May 28, 1996
    Assignee: Mobil Oil Corporation
    Inventors: Stephen H. Brown, Paul P. Durand, Timothy L. Hilbert, Thomas R. Kiliany, Chang-Kuei Lee, Jeffrey C. Trewella
  • Patent number: 5516956
    Abstract: A mixture of aromatic hydrocarbons, comprising ethylbenzene and at least one xylene, is isomerized using a two component catalyst system to convert the ethylbenzene to compounds that may be removed from the aromatic hydrocarbon stream and to produce a product stream wherein the para-xylene concentration is approximately equal to the equilibrium ratio of the para-isomer. The first catalyst comprises an intermediate pore size zeolite that is effective for ethylbenzene conversion. The first catalyst is preferably silica-bound. The second catalyst comprises an intermediate pore size zeolite, which further has a small crystal size and which is effective to catalyze xylene isomerization. Each of the catalysts of this invention may contain one or more hydrogenation/dehydrogenation component.
    Type: Grant
    Filed: November 18, 1994
    Date of Patent: May 14, 1996
    Assignee: Mobil Oil Corporation
    Inventors: Jeevan S. Abichandani, Chaya R. Venkat
  • Patent number: 5516341
    Abstract: Organic triazole-derived carboxylic acid-esters, and ester-amide-amine salts have been found to be effective antiwear additives for lubricants and are highly useful in fuels.
    Type: Grant
    Filed: June 30, 1994
    Date of Patent: May 14, 1996
    Assignee: Mobil Oil Corporation
    Inventors: Liehpao O. Farng, Andrew G. Horodysky, Ronald J. Poole, John R. Donofrio
  • Patent number: 5516959
    Abstract: A process is disclosed for the highly selective skeletal isomerization of linear olefin-containing organic feeds to iso-olefins at high levels of feed conversion wherein linear olefins, e.g., n-butenes, are contacted with catalyst comprising ZSM-35 under skeletal isomerization conditions which can include temperatures of 100 to 750.degree. C. The process uses a catalyst composition comprising ZSM-35, e.g., microcrystalline ZSM-35 having a crystal size whose largest dimension is no greater than 0.5 micron and whose ratio of its second largest dimension to said largest dimension ranges from 0.5 to 1. The process exhibits enhanced catalyst cycle life where the ZSM-35 is composited with a silica-containing matrix to provide a catalyst composite having a total pore volume greater than 0.6 cc/g or 300.sup.+ angstroms pore volume of greater than 0.1 cc/g.
    Type: Grant
    Filed: December 9, 1994
    Date of Patent: May 14, 1996
    Assignee: Mobil Oil Corporation
    Inventors: Iraj I. Rahmim, Albin Huss, Jr., Daria N. Lissy, Donald J. Klocke, Werner O. Haag
  • Patent number: 5515915
    Abstract: A well screen for use in gravel packing completions which produces a good distribution of gravel over the entire completion interval. The screen is comprised of a base pipe and an outer surface (e.g. wire wrap). A plurality of flow paths (e.g. shunt tubes) are positioned in the annulus which is formed between the base pipe and the outer surface of the screen, thereby providing the necessary alternate flowpaths for the slurry without substantially increasing the overall, effective outside diameter of the screen.
    Type: Grant
    Filed: April 10, 1995
    Date of Patent: May 14, 1996
    Assignee: Mobil Oil Corporation
    Inventors: Lloyd G. Jones, Tommy J. Yates
  • Patent number: 5516736
    Abstract: There is provided a method for selectivating a zeolite, such as ZSM-5 which may result in functionalization of the zeolite with at least one organosiliceous group of the formula, SiR.sub.n (OX).sub.4-n, where R is at least one hydrocarbyl group, n is 1 or 2 and X is Si or H. This selectivation method involves vapor phase treatment of a zeolite with an organosilicon compound having at least 2 silicon atoms. This organosilicon compound may be a silicone compound, such as hexamethyldisiloxane, or a silane compound such as hexamethyldisilane. This contacting may take place in the presence of hydrogen and an organic carrier. The functionalized zeolites may provide a catalyst which is both highly active and highly selective for converting aromatic hydrocarbons, especially alkylbenzene compounds, to products comprising the para-isomer of dialkylbenzenes. The disproportionation of toluene is an example of such a reaction.
    Type: Grant
    Filed: September 15, 1994
    Date of Patent: May 14, 1996
    Assignee: Mobil Oil Corp.
    Inventors: Clarence D. Chang, Paul G. Rodewald
  • Patent number: 5516962
    Abstract: There are provided a catalyst, a method for making this catalyst, and a process for using this catalyst in the alkylation of an isoparaffin with an olefin to provide an alkylate. The catalyst may be made from an as-synthesized material which, upon calcination, is capable of generating zeolites designated MCM-22. The as-synthesized material is then combined with a binder material, such as alumina, by an extrusion process. The uncalcined bound material may then be ammonium exchanged, followed by a calcination treatment. The as-synthesized material may also be swollen with a suitable swelling agent, such as a cetyltrimethylammonium compound, prior to the binding process.
    Type: Grant
    Filed: August 1, 1994
    Date of Patent: May 14, 1996
    Assignee: Mobil Oil Corp.
    Inventors: Cynthia T.-W. Chu, Altaf Husain, Kathleen M. Keville, Daria N. Lissy
  • Patent number: 5514289
    Abstract: Novel dihydrobenzothiophenes prepared via condensation of arylthiols and carbonyl or epoxide containing reagents have been found to be effective antioxidant and antiwear additives in lubricant applications. These additives are made from relatively low cost mercaptans and carbonyl compounds in a one-step high yield reaction.
    Type: Grant
    Filed: April 13, 1995
    Date of Patent: May 7, 1996
    Assignee: Mobil Oil Corporation
    Inventors: Halou Oumar-Mahamat, Andrew G. Horodysky, Andrew Jeng
  • Patent number: 5513705
    Abstract: The invention is a foam method for improving conformance during a steam flood or carbon dioxide flood in a subterranean, oil-containing formation penetrated by at least one injection well and at least one production well. In a steam flood oil recovery process, sweep efficiency is improved by injecting steam until steam breakthrough occurs at the production well after which a mixture of steam, a noncondensible gas, and an aqueous surfactant-polypeptide solution is injected into the formation. The aqueous surfactant-polypeptide solution forms a stable foam with the formation oil at formation conditions that reduce the permeability of the highly permeable steam swept zones thereby diverting the steam to other portions of the formation containing unswept oil. The polypeptide is used as a partial substitute for the surfactant to improve the cost of the foam-forming mixture without reducing its effectiveness in increasing sweep efficiency.
    Type: Grant
    Filed: May 10, 1995
    Date of Patent: May 7, 1996
    Assignee: Mobil Oil Corporation
    Inventors: Nizar F. Djabbarah, Ralph V. Garling, David T. Hand, Jennifer Macfadyen
  • Patent number: 5514634
    Abstract: An ethylene polymerization catalyst is prepared by impregnating a porous support, such as silica, with an organomagnesium compound such as a dialkylmagnesium compound, contacting the magnesium-containing support with a silane compound which is free of hydroxyl groups, such as tetraalkoxysilanes, e.g. tetraethyl orthosilicate, and incorporating a transition metal component, such as titanium tetrachloride, in a specific ratio to the magnesium and silane components. Activation of this catalyst precursor with dimethylaluminum chloride as a cocatalyst results in a catalyst system which is effective for the production of ethylene copolymers with multimodal molecular weight distributions.
    Type: Grant
    Filed: June 10, 1994
    Date of Patent: May 7, 1996
    Assignee: Mobil Oil Corporation
    Inventors: Robert O. Hagerty, Per K. Husby, Yury V. Kissin, Robert I. Mink, Thomas E. Nowlin
  • Patent number: 5513706
    Abstract: Formation stability surrounding a deviated wellbore penetrating a hydrocarbon reservoir is improved by alternately injecting higher and lower density consolidating materials, the higher density material improving stability in the formation primarily on the low side of the wellbore and the lower density material improving stability in the formation primarily on the high side of the wellbore.
    Type: Grant
    Filed: May 8, 1995
    Date of Patent: May 7, 1996
    Assignee: Mobil Oil Corporation
    Inventors: Alfred R. Jennings, Jr., E. Thomas Strom