Patents Represented by Attorney George W. Allen

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  • Shape selective reactions with cadmium-modified zeolite catalysts
    Patent number: 4384155
    Abstract: A zeolite catalyst composition suitable for para-selective conversion of substituted aromatic compounds, i.e., conversion of aromatic compounds to dialkylbenzene compounds rich in the 1,4-dialkyl-benzene isomer. Such a composition comprises a zeolite catalyst component having a silica to alumina mole ratio of at least 12 and a constraint index of about 1 to 12, and a minor amount, e.g, at least 0.25 weight percent of the element cadmium and optionally the element phosphorus, said elements being present in the form of their oxides.
    Type: Grant
    Filed: November 4, 1981
    Date of Patent: May 17, 1983
    Assignee: Mobil Oil Corporation
    Inventor: Chin-Chiun Chu
  • Shape selective reactions with zeolite catalysts modified with iron and/or cobalt
    Patent number: 4380685
    Abstract: A zeolite catalyst composition suitable for para-selective conversion of substituted aromatic compounds, e.g. conversion of aromatic compounds to dialkylbenzene compounds rich in the 1,4-dialkylbenzene isomer. Such a composition comprises a zeolite catalyst component having a silica to alumina mole ratio of at least 12 and a constraint index of about 1 to 12, and a minor amount, e.g., at least 0.25 weight percent of the elements iron and/or cobalt and optionally the element phosphorus, said elements being present in the form of their oxides.
    Type: Grant
    Filed: November 4, 1981
    Date of Patent: April 19, 1983
    Assignee: Mobil Oil Corporation
    Inventor: Chin-Chiun Chu
  • Alkyltitanium and alkylchromium catalysts for olefin polymerization
    Patent number: 4376722
    Abstract: Zeolite supported, organometallic based catalyst composition are provided which are especially suitable for the polymerization of 1-olefins such as ethylene. Alkyltitanium and alkylchromium compounds such as tributylchromium and tetrabutyltitanium are reacted with ZSM-5 type zeolites to produce such novel catalysts.
    Type: Grant
    Filed: October 27, 1981
    Date of Patent: March 15, 1983
    Assignee: Mobil Oil Corporation
    Inventors: Arthur W. Chester, James G. Murray
  • Catalytic conversion of methanol to light olefins
    Patent number: 4374295
    Abstract: A process for converting a methanol feed to light olefins over a zeolite catalyst comprising at least some crystalline aluminosilicate zeolitic material having a Constraint Index of about 1 to 12 and a silica/alumina mole ratio of at least about 12, e.g., ZSM-5, in the presence of an aldehyde-containing diluent comprising formaldehyde, acetaldehyde or mixtures thereof, under methanol conversion conditions. By using such a ZSM-5 type zeolite catalyst and an aldehyde-containing diluent, methanol can be converted to an olefin-containing hydrocarbon product enriched in C.sub.2 to C.sub.4 olefins such as ethylene.
    Type: Grant
    Filed: April 15, 1982
    Date of Patent: February 15, 1983
    Assignee: Mobil Oil Corporation
    Inventor: Carol S. Lee
  • Zeolite catalysts modified with group IIIA metal
    Patent number: 4374294
    Abstract: A zeolite catalyst composition suitable for para-selective conversion of substituted aromatic compounds, e.g., conversion of aromatic compounds to dialkylbenzene compounds rich in the 1,4-dialkylbenzene isomer. Such a composition comprises a zeolite catalyst component having a silica to alumina mole ratio of at least 12 and a constraint index of about 1 to 12, and a minor amount, e.g., at least 0.5 weight percent of a Group IIIA element, e.g., scandium, yttrium or Rare Earth elements, and optionally phosphorus, said elements being present in the form of their oxides.
    Type: Grant
    Filed: September 17, 1981
    Date of Patent: February 15, 1983
    Assignee: Mobil Oil Corporation
    Inventor: Chin-Chiun Chu
  • Group IB metal modified zeolite catalysts
    Patent number: 4374045
    Abstract: A zeolite catalyst composition suitable for para-selective conversion of substituted aromatic compounds, e.g., conversion of aromatics to dialkylbenzene compounds rich in the 1,4-dialkylbenzene isomer. Such a composition comprises a zeolite catalyst component having a silica to alumina mole ratio of at least 12 and a constraint index of about 1-12, and a minor amount, e.g., at least 0.25 weight percent, of copper, silver and/or gold, and optionally phosphorus.
    Type: Grant
    Filed: April 24, 1981
    Date of Patent: February 15, 1983
    Assignee: Mobil Oil Corporation
    Inventor: Chin-Chiun Chu
  • Zeolites modified with group VA metals
    Patent number: 4371457
    Abstract: A modified zeolite catalyst composition useful for the conversion of aromatic compounds to dialkylbenzene compounds rich in the 1,4-dialkylbenzene isomer. The reaction is carried out in the presence of a zeolite catalyst having a silica to alumina mole ratio of at least 12 and a constraint index of about 1-12, said catalyst having been modified prior to use by treatment with compounds of Group VA of the Periodic Chart (V, Nb and Ta), and optionally phosphorus, to deposit a minor proportion of such elements on the zeolite.
    Type: Grant
    Filed: December 19, 1980
    Date of Patent: February 1, 1983
    Assignee: Mobil Oil Corporation
    Inventor: Chin-Chiun Chu
  • Preparation of 4-alkylanisoles and phenols
    Patent number: 4371714
    Abstract: A process for the selective alkylation of phenol or its alkyl ethers, in the presence of a particular type of zeolite catalyst, to produce a product rich in 4-alkyl phenyl alkyl ethers (e.g. 4-methylanisole). The zeolite is characterized by a Constraint Index of 1 to 12 and a silica to alumina mole ratio of at least 12, and may optionally contain a minor amount of a difficultly reducible oxide.
    Type: Grant
    Filed: December 30, 1980
    Date of Patent: February 1, 1983
    Assignee: Mobil Oil Corporation
    Inventor: Lewis B. Young
  • Selective cracking of disubstituted benzenes having polar substituents
    Patent number: 4371721
    Abstract: A process for selective cracking of 1,4-disubstituted benzene compounds having at least one polar substituent. Mixtures containing isomers of such a compound are brought into contact with a specified type of shape selective crystalline zeolite catalyst under conditions of temperature and pressure conducive to reaction of said benzene compound, thereby selectively reacting the 1,4-disubstituted isomer in preference to the 1,2- and 1,3-disubstituted isomers of said polar benzene compound. The shape selective zeolite catalysts employed herein are crystalline zeolites characterized by a silica to alumina ratio of at least about 12 and a constraint index within the approximate range of 1 to 12.
    Type: Grant
    Filed: September 25, 1981
    Date of Patent: February 1, 1983
    Assignee: Mobil Oil Corporation
    Inventor: Margaret M. Wu
  • Para-selective zeolite catalysts treated with nitrogen compounds
    Patent number: 4370508
    Abstract: A process is provided for modifying ZSM-5 type zeolite catalysts with gaseous nitrogen-based treating agents in order to enhance the para-selective properties of such catalysts for the conversion of aromatic materials to dialkyl-substituted benzene compounds. Nitrogen-based treating agents include nitrogen dioxide and ammonia. Catalyst compositions so treated can be used in alkylation, transalkylation or disproportionation processes to provide product mixtures having exceptionally high concentrations of the para-dialkylbenzene isomer.
    Type: Grant
    Filed: June 26, 1981
    Date of Patent: January 25, 1983
    Assignee: Mobil Oil Corporation
    Inventor: Warren W. Kaeding
  • Para-selective zeolite catalysts treated with carbon dioxide
    Patent number: 4367359
    Abstract: A process is provided for modifying ZSM-5 type zeolite catalysts with carbon dioxide treating agent in order to enhance the para-selective properties of such catalysts for the conversion of aromatic materials to dialkyl-substituted benzene compounds. Catalyst compositions so treated can be used in alkylation, transalkylation or disproportionation processes to provide product mixtures having exceptionally high concentrations of the para-dialkylbenzene isomer.
    Type: Grant
    Filed: June 26, 1981
    Date of Patent: January 4, 1983
    Assignee: Mobil Oil Corporation
    Inventor: Warren W. Kaeding
  • Acrylic modified anionic water dispersible polystyrene
    Patent number: 4366293
    Abstract: This invention provides a graft copolymer of at least one acrylic monomer and polystyrene, in which at least about 8 percent of the total weight of said graft copolymer is derived from acrylic acid, methacrylic acid, or both. It also provides anionic aqueous dispersions of such graft copolymers and coating compositions containing them.
    Type: Grant
    Filed: June 17, 1981
    Date of Patent: December 28, 1982
    Assignee: Mobil Oil Corporation
    Inventor: Michael A. Tobias
  • Preparation of alkyl carboxylates
    Patent number: 4365084
    Abstract: A method for preparation of alkyl carboxylate compounds, and especially .alpha.-methylalkyl carboxylate compounds, by reaction of an olefin and a carboxylic acid compound in the presence of a particular type of zeolite catalyst. The zeolites are characterized by a silica to alumina mole ratio of at least 12 and a constraint index of 1 to 12. Zeolites ZSM-5 and ZSM-12 are particularly preferred.
    Type: Grant
    Filed: December 19, 1980
    Date of Patent: December 21, 1982
    Assignee: Mobil Oil Corporation
    Inventor: Lewis B. Young
  • Preparation of alkyl carboxylates
    Patent number: 4365083
    Abstract: A method for preparation of alkyl carboxylate compounds, and especially methylalkyl carboxylate compounds, by reaction of an olefin and a carboxylic acid compound in the presence of a mordenite catalyst.
    Type: Grant
    Filed: December 19, 1980
    Date of Patent: December 21, 1982
    Assignee: Mobil Oil Corporation
    Inventor: Lewis B. Young
  • Acrylic modified anionic water dispersible styrene allyl alcohol copolymers
    Patent number: 4360640
    Abstract: This invention provides a graft copolymer of at least one acrylic monomer and a random copolymer of a styrene and allyl alcohol, in which at least about 8 percent of the total weight of said graft copolymer is derived from acrylic acid, methacrylic acid, or both. It also provides anionic aqueous dispersions of such graft copolymers and coating compositions containing them.
    Type: Grant
    Filed: June 17, 1981
    Date of Patent: November 23, 1982
    Assignee: Mobil Oil Corporation
    Inventor: Michael A. Tobias
  • Acrylic modified anionic water dispersible styrene hydroxyethyl (meth)acrylate copolymers
    Patent number: 4360641
    Abstract: This invention provides a graft copolymer of at least one acrylic monomer and a random copolymer of a styrene and hydroxyethyl (meth)acrylate, in which at least about 8 percent of the total weight of said graft copolymer is derived from acrylic acid, methacrylic acid, or both. It also provides anionic aqueous dispersions of such graft copolymers and coating compositions containing them.
    Type: Grant
    Filed: June 17, 1981
    Date of Patent: November 23, 1982
    Assignee: Mobil Oil Corporation
    Inventor: Michael A. Tobias
  • Acrylic modified anionic water dispersible styrene (meth)acrylonitrile copolymers
    Patent number: 4360642
    Abstract: This invention provides a graft copolymer of at least one acrylic monomer and a random copolymer of a styrene and (meth)acrylonitrile, in which at least about 8 percent of the total weight of said graft copolymer is derived from acrylic acid, methacrylic acid, or both. It also provides anionic aqueous dispersions of such graft copolymers and coating compositions containing them.
    Type: Grant
    Filed: June 18, 1981
    Date of Patent: November 23, 1982
    Assignee: Mobil Oil Corporation
    Inventor: Michael A. Tobias
  • Zeolite catalysts modified with group IV A metals
    Patent number: 4358397
    Abstract: A modified zeolite catalyst composition useful for the conversion of aromatic compounds to dialkylbenzene compounds rich in the 1,4-dialkylbenzene compounds rich in the 1,4-dialkylbenzene isomer. The reaction is carried out in the presence of a zeolite catalyst having a silica to alumina mole ratio of at least 12 and a constraint index of about 1-12, said catalyst having been modified by treatment with compounds of Group IV A (Ti, Zr, Hf), and optionally phosphorus, to deposit a minor proportion of such elements on the zeolite.
    Type: Grant
    Filed: December 31, 1980
    Date of Patent: November 9, 1982
    Assignee: Mobil Oil Corporation
    Inventor: Chin C. Chu
  • Chemically modified imidazole curing catalysts for epoxy resin and powder coatings containing them
    Patent number: 4358571
    Abstract: Imidazole or substituted imidazole is adducted with acrylate ester, an epoxy, or an isocyanate followed by neutralization with lower fatty acid or alkylene or aromatic dicarboxylic acid. The product is a curing agent which is combined with an epoxy resin to form a powder coating.
    Type: Grant
    Filed: March 10, 1981
    Date of Patent: November 9, 1982
    Assignee: Mobil Oil Corporation
    Inventors: Marvin L. Kaufman, George F. Salathe
  • Shape selective reactions with zeolite catalysts modified with group IA metals
    Patent number: 4329533
    Abstract: A process for the conversion of aromatic compounds to dialkylbenzene compounds rich in the 1,4-dialkylbenzene isomer. The reaction is carried out in the presence of a particular type of zeolite catalyst having a silica to alumina mole ratio of at least 12 and a constraint index of about 1-12, said catalyst having been modified by treatment with metal compounds of elements from Group IA of the Periodic Chart, and optionally phosphorus, to deposit a minor proportion of such elements on the zeolite.
    Type: Grant
    Filed: May 5, 1980
    Date of Patent: May 11, 1982
    Assignee: Mobil Oil Corporation
    Inventor: Chin-Chiun Chu