Patents Represented by Attorney, Agent or Law Firm William L. Krayer
  • Manufacture of neopentyl glycol (III)
    Patent number: 5146012
    Abstract: Neopentyl glycol is made from isobutyraldehyde and paraformaldehyde; the aldol reaction product is directly mixed with a lower alcohol for hydrogenolysis.
    Type: Grant
    Filed: June 28, 1991
    Date of Patent: September 8, 1992
    Assignee: Aristech Chemical Corporation
    Inventors: Jeffrey S. Salek, Joseph Pugach, Carole L. Elias, Leonard A. Cullo
  • Manufacture of neopentyl glycol (I)
    Patent number: 5144088
    Abstract: Neopentyl glycol is made by reacting isobutyraldehyde with paraformaldehyde in the presence of a tertiary amine and one or more oxides of elements of Groups IB, IVA, IVB, VA, VB, VIB and VIII of the periodic table; then hydrogenating the resulting hydroxypivaldehyde-containing product.
    Type: Grant
    Filed: April 26, 1991
    Date of Patent: September 1, 1992
    Assignee: Aristech Chemical Corporation
    Inventors: Jeffrey S. Salek, Joseph Pugach
  • Silyl derivatives of eugenol
    Patent number: 5110971
    Abstract: Silyl derivatives of eugenol include compositions of the formula ##STR1## where R.sup.1, R.sup.2 and R.sup.3 are independently selected from linear, branched, and cyclic hydrocarbon groups having a total of from one to about eight carbon atoms, except that where one of R.sup.1, R.sup.2 or R.sup.3 is a phenyl group, the total of carbon atoms must be at least nine. They may be made by silylating the corresponding hydroxyl compound. They are useful as comonomers for olefins to introduce functional sites and may be copolymerized in Ziegler-Natta catalyst systems.
    Type: Grant
    Filed: September 5, 1990
    Date of Patent: May 5, 1992
    Assignee: Aristech Chemical Corporation
    Inventors: Mary K. Haus, Andrew J. Sivak
  • Aniline catalyst
    Patent number: 5091579
    Abstract: Amination of phenolic compounds by ammonia is accomplished in the presence of a gamma alumina containing a small amount of fluoride.
    Type: Grant
    Filed: July 14, 1989
    Date of Patent: February 25, 1992
    Assignee: Aristech Chemical Corporation
    Inventor: Leonard A. Cullo
  • Purified para-cumylphenol
    Patent number: 5091058
    Abstract: Method of preparing para-cumylphenol including reacting an excess of phenol with alpha-methylstyrene by the slow addition of alpha-methylstyrene to a 50% to 200% molar excess of phenol at a temperature from about 80.degree. C. to about 90.degree. C. in the presence of an acid catalyst and thereafter maintaining the temperature at about 95.degree. to about 100.degree. C. to obtain a crude cumylphenol reaction product containing acid derived from the catalyst, and distilling the reaction product in the presence of an amount of base sufficient to neutralize the acid therein.
    Type: Grant
    Filed: January 25, 1991
    Date of Patent: February 25, 1992
    Assignee: Aristech Chemical Corporation
    Inventor: William R. Davie
  • Method of making mesitylene
    Patent number: 5087781
    Abstract: Mesitylene (1,3,5 trimethylbenzene) is made by passing acetone in the vapor phase over a niobium catalyst. The catalyst is preferably made by impregnating a silica support with 2% niobium by weight and calcining for about 18 hours at about 550.degree. C. 70% selectivity is obtained at 60-80% by weight conversion.
    Type: Grant
    Filed: June 6, 1991
    Date of Patent: February 11, 1992
    Assignee: Aristech Chemical Corporation
    Inventors: Alain A. Schutz, Leonard A. Cullo
  • Method of transferring latex particles from an aqueous to an organic phase and making an impact resistant acrylic sheet
    Patent number: 5084495
    Abstract: Impact resistant compositions are prepared by the incorporation of acrylic rubber particles (or multi-stage emulsion polymer particles containing a rubbery layer) in a predominantly methyl methacrylate matrix. The emulsion particles are prepared in water as a latex stabilized with anionic groups. The particles are transferred to a methyl methacrylate medium by destabilizing the latex with a quaternary ammonium salt and optionally a di- or multivalent inorganic salt. Impact resistant compositions are prepared by separating the water from the methyl methacrylate layer and polymerizing the methyl methacrylate.
    Type: Grant
    Filed: October 10, 1989
    Date of Patent: January 28, 1992
    Assignee: Aristech Chemical Corporation
    Inventors: Louis A. Cutter, John J. Godfrey
  • Method of transferring latex particles from an aqueous to an organic phase and making an impact resistant acrylic sheet
    Patent number: 5082879
    Abstract: Impact resistant compositions are prepared by the incorporation of acrylic rubber particles (or multi-stage emulsion polymer particles containing a rubbery layer) in a predominantly methyl methacrylate matrix. The emulsion particles are prepared in water as a latex stabilized with anionic groups. The particles are transferred to a methyl methacrylate medium by destabilizing the latex with a quaternary ammonium salt and optionally a di- or multivalent inorganic salt. Impact resistant compositions are prepared by separating the water from the methyl methacrylate layer and polymerizing the methyl methacrylate.
    Type: Grant
    Filed: October 10, 1989
    Date of Patent: January 21, 1992
    Assignee: Aristech Chemical Corporation
    Inventors: Louis A. Cutter, John J. Godfrey
  • Manufacture of 2,6-hydroxynaphthoic acid
    Patent number: 5075496
    Abstract: 2,6-hydroxynaphthoic acid is made by reacting 2-naphthol with cesium or rubidium hydroxide to obtain cesium or rubidium naphthoxide, and reacting the naphthoxide with CO.sub.2 in the presence of cesium or rubidium carbonate.
    Type: Grant
    Filed: December 14, 1990
    Date of Patent: December 24, 1991
    Assignee: Aristech Chemical Corporation
    Inventors: Joseph Pugach, Donald T. Derussy
  • Preparation of methyl isopropenyl ketone
    Patent number: 5072051
    Abstract: Methyl isopropenyl ketone is produced from methyl ethyl ketone and paraformaldehyde under mild reaction conditions utilizing a catalyst comprising a halogen acid salt of a secondary amine and (a) a non-soluble solid oxide of an element selected from Groups IB, IIIA, IVA, IVB, VA, VB, VIB and VIII of the periodic table, or (b) a carboxylic acid. Temperatures of 120-150 and pressures of 700-1400 kpa are preferred; co-products may include ethyl vinyl ketone.
    Type: Grant
    Filed: July 30, 1990
    Date of Patent: December 10, 1991
    Assignee: Aristech Chemical Corporation
    Inventors: Joseph Pugach, Jeffrey S. Salek
  • ABS/Acrylic lamination process
    Patent number: 5069851
    Abstract: Continuous lamination of ABS and polymethylmethacrylate (PMMA) is achieved employing a continuous sheet or reel of PMMA 0.1 inch to 0.250 inch thick optionally preheated on one side; a web of ABS is extruded at about 450.degree.-550.degree. F. from pellets onto the PMMA at the nip of a roll stack. In the roll stack, the two laminated layers are compressed and gradually cooled. The laminate displays properties of both ABS and acrylic. It has excellent thermoforming properties.
    Type: Grant
    Filed: July 9, 1990
    Date of Patent: December 3, 1991
    Assignee: Aristech Chemical Corporation
    Inventors: Clark T. Hicks, Ray D. Hoffman, James E. Thompson, II
  • Process for aldol condensation
    Patent number: 5055620
    Abstract: Basic mixed oxides useful for base catalyzed reactions such as the aldol condensation of acetone and also useful as catalyst supports are made by mixing an acid such as nitric acid or acetic acid with a pseudoboehmite to form a gel, adding magnesium oxide or hydroxide, in a ratio of magnesium to aluminum of about 1:1 to about 10:1, agitating and heating for about 1 to 24 hours, and subsequently drying and calcining. The resulting polymorphic magnesium-aluminum oxide composition is hightly effective in the aldol condensation of acetone to isophorone, and other base catalyzed reactions such as isomerization of olefins, aldol condensation of aldehydes.
    Type: Grant
    Filed: September 4, 1990
    Date of Patent: October 8, 1991
    Assignee: Aristech Chemical Corporation
    Inventor: Alain A. Schutz
  • Biodeteriable plastics and blends
    Patent number: 5026745
    Abstract: Improved mechanical properties have been obtained in a biodeteriable polypropylene by mixing starch with a polypropylene modified with maleic anhydride.
    Type: Grant
    Filed: June 12, 1989
    Date of Patent: June 25, 1991
    Assignee: Aristech Chemical Corporation
    Inventor: Richard C. Weil
  • Silyl derivatives of 2,6-dimethyl-4-allyl phenol
    Patent number: 5008421
    Abstract: Silyl derivatives of 2,6 dimethyl, 4-allyl phenol include compositions of the formula ##STR1## where R.sup.1, R.sup.2, and R.sup.3 are independently selected from alkyl and phenyl groups having up to about eight carbon atoms and/or are connected to form one or more rings. They may be made by silylating the corresponding hydroxyl compound. They are useful as comonomers for olefins to introduce functional sites in high molecular weight copolymers.
    Type: Grant
    Filed: October 10, 1989
    Date of Patent: April 16, 1991
    Assignee: Aristech Chemical Corporation
    Inventors: George L. Brownell, Mary K. Hays, Andrew J. Sivak
  • Preparation of unsaturated ketones from acetone and paraformaldehyde (II)
    Patent number: 5004839
    Abstract: Unsaturated ketones are produced from ketones and paraformadehyde under mild reaction conditions utilizing a catalyst comprising a halogen acid salt of a secondary amine and a nonsoluble solid oxide of an element selected from groups IB, IIIA, IVA, IVB, VA, VB, VIB and VIII of the periodic table. Temperatures of 120-150 and pressures of 700-1200 kpa are preferred; by-products may include di-unsaturated ketones such as divinyl ketone. Unsaturated ketones such as methyl vinyl ketone are useful in imparting ultraviolet sensitivity to plastics which enhances degradability.
    Type: Grant
    Filed: April 13, 1990
    Date of Patent: April 2, 1991
    Assignee: Aristech Chemical Corporation
    Inventors: Joseph Pugach, Jeffrey S. Salek
  • Method and apparatus for achieving balanced flow on multipass distillation trays
    Patent number: 4995946
    Abstract: A multipass distillation or other column having substantially horizontal trays is constructed to equilibrate the liquid to vapor ratio on both sides of a downcomer, each side having the same area but a different shape, by adjusting the clearances under each side of said downcomer until the ratio of liquid passing to a first side to liquid passing to the other side is the same as the ratio of vapor passing to said first side as vapor passing to the other.
    Type: Grant
    Filed: October 10, 1989
    Date of Patent: February 26, 1991
    Assignee: Aristech Chemical Corporation
    Inventor: Robert G. Auger
  • Use of silica-titania hydrocarbon conversion catalyst in hydrocarbon conversion processes
    Patent number: 4996385
    Abstract: Crystalline silica-titania catalyst compositions, optionally containing magnesium, are disclosed; the titanium is introduced through the use of organo-titanate chelates wherein the titanium has a coordination number of at least 5. The compositions are used in acid-catalyzed reactions such as alkylation reactions.
    Type: Grant
    Filed: December 18, 1989
    Date of Patent: February 26, 1991
    Assignee: Aristech Chemical Corporation
    Inventors: Leonard A. Cullo, Francis J. Shiring, III
  • Polymer partculates for molding and the like
    Patent number: 4983668
    Abstract: Particle size, swelling, and other characteristics of unsaturated polyester beads are controlled in a suspension polymerization system to make beads suitable for use as fillers in molding and forming. Process steps include degassing prior to polymerization, positive pressure during polymerization, and washing to remove suspending agent.
    Type: Grant
    Filed: November 25, 1987
    Date of Patent: January 8, 1991
    Assignee: Aristech Chemical Corporation
    Inventors: Louis A. Cutter, Richard A. Ganger, John J. Godfrey
  • Thermosetting composition from maleimide, olefinic monomer and unsaturated polyester
    Patent number: 4983669
    Abstract: Thermosetting compositions comprise, (a) about 10% to about 60% of a polymerizable olefinic monomer such as styrene or vinyl toluene (b) from about 1 to about 40% of a maleimide of the formula: ##STR1## where R.sup.1 and R.sup.2 are independently selected from hydrogen or C.sub.1-3 alkyl groups, and in which the phenyl group may be substituted with aliphatic, alicyclic, and aromatic groups and up to three halogen or hydroxyl groups, and (c) about 5% to about 89% unsaturated polyester.The compositions are useful for their electrical and heat resistant properties as molding compositions, for the impregnation of electrical coils and for encasing electrical components.
    Type: Grant
    Filed: March 1, 1989
    Date of Patent: January 8, 1991
    Assignee: Aristech Chemical Corporation
    Inventors: Virginia Piermattie, George L. Brownell
  • Basic mixed oxide
    Patent number: 4970191
    Abstract: Basic mixed oxides useful for base catalyzed reactions such as the aldol condensation of acetone and also useful as catalyst supports are made by mixing an acid such as nitric acid or acetic acid with a pseudob oehmite to form a gel, adding magnesium oxide or hydroxide, in a ratio of magnesium to aluminum of about 1:1 to about 10:1, agitating and heating for about 1 to 24 hours, and subsequently drying and calcining. The resulting polymorphic magnesium-aluminum oxide composition is highly effective in the aldol condensation of acetone to isophorone, and other base catalyzed reactions such as isomerization of olefins, aldol condensation of aldehydes.
    Type: Grant
    Filed: April 18, 1989
    Date of Patent: November 13, 1990
    Assignee: Aristech Chemical Corporation
    Inventor: Alain A. Schutz