Patents Represented by Attorney S. H. Markowitz
  • Patent number: 4914068
    Abstract: This invention relates to methods for dispersing Group-VIII and other metals containing zeolites, particularly large pore zeolites.
    Type: Grant
    Filed: March 21, 1988
    Date of Patent: April 3, 1990
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Virginia R. Cross, Jar L. Kao, Thomas H. Vanderspurt, Murray Nadler, Theodorus M. Wortel
  • Patent number: 4894214
    Abstract: Zeolite L containing caesium is prepared by a process in which said zeolite L is crystallized from a synthesis mixture with a molar composition (expressed as oxides) of:K.sub.2 O/SiO.sub.2 : 0.15 to 0.40K.sub.2 O/Cs.sub.2 O: 3 to 10H.sub.2 O/K.sub.2 O: 40 to 100, andSiO.sub.2 /Al.sub.2 O.sub.3 : 7 to 13and containing 0.5 to 15 ppm (by weight) of divalent metal carbons, e.g. Mg ions. The zeolite L can form part of a dehydrocyclization and/or isomerization catalyst.
    Type: Grant
    Filed: February 25, 1988
    Date of Patent: January 16, 1990
    Assignee: Exxon Research & Engineering Company
    Inventors: Johannes P. Verduijn, Pieter E. Gellings
  • Patent number: 4882406
    Abstract: Nodular copolymer and method of preparing a nodular copolymer by preparing a copolymer chain and coupling it with a coupling agent. The copolymers which form the nodular copolymer are formed of first and second segments, of which the second segments, containing the coupling agent, react to form the nodular region. The nodular copolymer is particularly useful as a lube oil additive.
    Type: Grant
    Filed: March 5, 1986
    Date of Patent: November 21, 1989
    Assignee: Exxon Research & Engineering Company
    Inventors: Charles Cozewith, Shiaw Ju, Gary W. Verstrate
  • Patent number: 4851605
    Abstract: A process for preparing a zeolite, e.g. ZSM-5, under controlled conditions of pH adjustment with an acid; SiO.sub.2 /Al.sub.2 O.sub.3 mole ratio, and in the substantial absence of alkali metal cations, is disclosed, as well as a process for using the same to synthesize olefins from methanol and/or dimethyl ether.
    Type: Grant
    Filed: July 13, 1984
    Date of Patent: July 25, 1989
    Assignee: Exxon Research & Engineering Co.
    Inventors: Arie Bortinger, Wim Pieters, Elena N. Suciu
  • Patent number: 4849361
    Abstract: Method of characterizing the coking tendency of a baseoil, by:(a) exposing the baseoil to conditions which accelerate asphaltene formation in the baseoil; and(b) testing for the onset and/or progression of asphaltene formation as a function of time.The technique is also useful for determining the efficacy of oil additives.
    Type: Grant
    Filed: June 20, 1986
    Date of Patent: July 18, 1989
    Assignee: Exxon Chemical Patents Inc.
    Inventor: Ghazi B. Dickakian
  • Patent number: 4843129
    Abstract: A composition comprising:(a) at least one copolymer having at least one of M.sub.w /M.sub.n less than 2 and M.sub.z /M.sub.w less than 1.8; and(b) at least one plastic composition.The composition can be produced by preparing the elastomer and then blending it with the plastic. The composition can be subjected to an additional step of curing.
    Type: Grant
    Filed: March 3, 1986
    Date of Patent: June 27, 1989
    Assignee: Exxon Research & Engineering Company
    Inventors: Lawrence Spenadel, Joel H. Grosser, Stephen M. Dwyer
  • Patent number: 4839320
    Abstract: This invention relates to a method for treating zeolite-containing catalysts. It is particularly suitable for making catalytic compositions made up of large pore zeolites of which a large percentage of the cationic substitution sites therein contain an alkali or alkaline earth metal and further containing one or more other Group VIII noble metals and a binder. The binder preferably is formed of a particular ratio of alumina from both a sol and boehmite. The step of impregnating the zeolite with a catalytic metal may be carried out at a particular pH range so as to promote aromatics yield after later regeneration. The formed catalyst is treated with a solution of a particular pH at one or more instances either in the catalyst production procedure or after its use to stabilize the catalyst after regeneration. This catalyst is suitable for use as a reforming catalyst or in the production of benzene. The catalyst has quite high activity, selectivity, and excellent physical characteristics.
    Type: Grant
    Filed: October 13, 1987
    Date of Patent: June 13, 1989
    Assignee: Exxon Research & Engineering Co.
    Inventors: Theodore D. Trowbridge, Shun C. Fung
  • Patent number: 4828681
    Abstract: The invention relates to carrying out thermal cracking of hydrocarbons, or other thermal conversions of organic substances in a reactor, for which a suitable reaction time is extremely short, e.g. of the order of milliseconds. Particulate solids are used as heat carrier and as feed an organic substance is used in the form of a gas which may contain some liquid; the hot particulate solids are introduced at low or no velocity into contact with the gas, which is at substantially higher velocity; the solids accelerate in passing through the reactor but the reaction is terminated substantially before the solids attain the velocity of the product gas. Contact times are short so that the solids do not accelerate to erosive speeds. The velocity differential enhances the heat transfer rate which makes short reaction times feasible.
    Type: Grant
    Filed: January 15, 1987
    Date of Patent: May 9, 1989
    Assignee: Exxon Research & Engineering Company
    Inventors: John B. Yourtee, John M. Matsen
  • Patent number: 4824969
    Abstract: A process for reacting in admixture, an olefin with oxygen, CO, and water, to form a cyclic alkylene carbonate, in the presence of a catalyst composition comprising a catalytically active osmium compound, copper containing co-catalyst I (e.g. CuBr.sub.2) and a co-catalyst II (e.g. pyridine) is disclosed.
    Type: Grant
    Filed: December 24, 1984
    Date of Patent: April 25, 1989
    Assignee: Exxon Research & Engineering Co.
    Inventors: Richard G. Austin, Robert C. Michaelson, Richard S. Myers
  • Patent number: 4824816
    Abstract: This invention relates to a method for producing zeolite-containing catalysts. It is particularly suitable for making catalytic compositions made up of large pore zeolites of which a large percentage of the cationic substitution sites therein contain an alkali or alkaline earth metal and further containing one or more other Group VIII noble metals and a binder. The binder preferably is formed of a particular ratio of alumina from both a sol and boehmite. The step of impregnating the zeolite with a catalytic metal is carried out at a particular pH range so as to promote aromatics yield after later regeneration. This catalyst is suitable for use as a reforming catalyst or in the production of benzene. The catalyst has quite high activity, selectivity, and excellent physical characteristics.
    Type: Grant
    Filed: September 21, 1987
    Date of Patent: April 25, 1989
    Assignee: Exxon Research & Engineering Company
    Inventors: Theodore D. Trowbridge, Shun C. Fung, Thomas H. Vanderspurt
  • Patent number: 4804800
    Abstract: A process for preparing a zeolite, e.g. ZSM-5, under controlled conditions of initial pH adjustment with an acid, SiO.sub.2 /Al.sub.2 O.sub.3 mole ratio, and in the presence of sodium cations, is disclosed, as well as a process for using the same to synthesize olefins from methanol and/or dimethyl ether.
    Type: Grant
    Filed: November 16, 1987
    Date of Patent: February 14, 1989
    Assignee: Exxon Research & Engineering Co.
    Inventors: Arie Bortinger, Robert A. Maggio, Wim J. M. Pieters
  • Patent number: 4801654
    Abstract: A block copolymer is disclosed which includes an ethylene-propylene copolymer segment (A) and a tetrahydrofuran segment (B). The weight ratio of (A) to (B) is 5/95 to 95/5, and the block copolymer has a number-average molecular weight of about 1,000 to about 1,000,000.
    Type: Grant
    Filed: June 12, 1987
    Date of Patent: January 31, 1989
    Assignee: Toa Nenryo Kogyo K.K.
    Inventors: Tokuo Makishima, deceased, by Nobuko Makishima, legal representative, Satoshi Ueki, Chihiro Imai
  • Patent number: 4792595
    Abstract: The present invention relates to novel copolymers of alpha-olefins comprised of intramolecularly heterogeneous and intermolecularly homogeneous copolymer chains.
    Type: Grant
    Filed: June 17, 1985
    Date of Patent: December 20, 1988
    Assignee: Exxon Research & Engineering Co.
    Inventors: Charles Cozewith, Shiaw Ju, Gary W. Verstrate
  • Patent number: 4786697
    Abstract: Polymodal MWD ethylene copolymer comprising at least two modes of differing molecular weights. Each mode has at least one of M.sub.w /M.sub.n of less than 2.0, and a M.sub.z /M.sub.w of less than 1.8. The polymodal character of the copolymer is achieved by either (1) withdrawing polymer modes from the reactor from at least one takeoff port, and blending such modes with the reactor effluent, or (2) utilizing at least two catalyst species in the reaction to produce modes of differing molecular weights.
    Type: Grant
    Filed: May 4, 1987
    Date of Patent: November 22, 1988
    Assignee: Exxon Research & Engineering Co.
    Inventors: Charles Cozewith, Shiaw Ju, Gary W. Verstrate
  • Patent number: 4764356
    Abstract: A process for preparing a zeolite, e.g. ZSM-5, under controlled conditions of initial pH adjustment with an acid, SiO.sub.2 /Al.sub.2 O.sub.3 mole ratio, and in the presence of sodium cations, is disclosed, as well as a process for using the same to synthesize olefins from methanol and/or dimethyl ether.
    Type: Grant
    Filed: December 21, 1984
    Date of Patent: August 16, 1988
    Assignee: Exxon Research & Engineering Co.
    Inventors: Arie Bortinger, Robert A. Maggio, Wim J. M. Pieters
  • Patent number: 4741840
    Abstract: A process is disclosed for treating sludge to remove the liquid hydrocarbons from the insoluble particles in the sludge to provide treated particles which are environmentally safe. The process involves mixing the sludge with a hydrocarbon diluent, separating the particles from the diluent-sludge mixture, then mixing the separated particles and remaining diluent with water and distilling off the remaining diluent to obtain the treated particles.
    Type: Grant
    Filed: June 25, 1986
    Date of Patent: May 3, 1988
    Assignee: Exxon Research & Engineering Co.
    Inventors: George A. Atherton, Ghazi A. Dickakian, Edward D. Grant, Jr.
  • Patent number: 4737301
    Abstract: Inexpensive lubricating oil antioxidants having a solubilizing group which comprises alkyl and cycloalkyl-substituted aromatics and a reducing thiophenyl group, which are useful motor oil additives. Method of reducing coking tendencies of lubricating oils by incorporating the substituted aromatic antioxidants.
    Type: Grant
    Filed: June 20, 1986
    Date of Patent: April 12, 1988
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Ricardo Bloch, Ghazi B. Dickakian
  • Patent number: 4722971
    Abstract: By selecting the composition and intermolecular compositional distribution with respect to ethylene and diene content and the molecular weight and molecular weight distribution, ethylene-propylene-diene terpolymers can have both improved processing properties and compound vulcanizate physical properties. The lower molecular weight fractions of 10.sup.4 to about 5.times.10.sup.5 have at least 2 times the diene content of the higher molecular weight fractions and an ethylene content of 30-80 wt. %. The higher molecular weight fractions of 2.times.10.sup.5 to about 10.sup.7 have a higher ethylene content than the lower molecular weight fractions and are less than 90 wt. % ethylene.
    Type: Grant
    Filed: February 24, 1987
    Date of Patent: February 2, 1988
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Sudhin Datta, Edward N. Kresge
  • Patent number: 4716207
    Abstract: A method of preparing a nodular polymer by preparing a copolymer chain and coupling it to a coupling agent. The coupling agent is a non-conjugated diene. Preferably the non-conjugated diene has both double bonds Ziegler catalyst polymerizable. The preferred product comprises a norbornadiene coupled ethylene copolymer wherein the ethylene copolymer has a M.sub.z /M.sub.m of less than 2.0 and a M.sub.w /M.sub.n of less than 1.8 before coupling.
    Type: Grant
    Filed: September 4, 1986
    Date of Patent: December 29, 1987
    Assignee: Exxon Research & Engineering Co.
    Inventors: Charles Cozewith, Shiaw Ju, Gary W. Verstrate
  • Patent number: 4705830
    Abstract: A block copolymer is disclosed which includes an ethylene-propylene copolymer segment (A) and a tetrahydrofuran segment (B). The weight ratio of (A) to (B) is 5/95 to 95/5, and the block copolymer has a number-average molecular weight of about 1,000 to about 1,000,000.
    Type: Grant
    Filed: May 24, 1985
    Date of Patent: November 10, 1987
    Assignee: Toa Nenryo Kogyo Kabushiki Kaisha
    Inventors: Tokuo Makishima, deceased, by Nobuko Makishima, legal representative, by Satoshi Ueki, legal representative, by Chichiro Imai, legal representative