Patents Assigned to UOP Inc.
  • Patent number: 4735929
    Abstract: Superior isomerization performance is obtained with a catalytic composition comprising a Group VIII noble metal and a hydrogen form mordenite incorporated with alumina. The superior performance is a direct result of the catalyst composition having a surface area of at least 580 m.sup.2 /g. A novel method of preparing an isomerization catalyst having a surface area of at least 580 m.sup.2 /g is characterized by contacting a formed catalytic composite with an acidic aqueous solution prior to addition of the Group VIII noble metal.
    Type: Grant
    Filed: November 18, 1986
    Date of Patent: April 5, 1988
    Assignee: UOP Inc.
    Inventors: Steve T. Bakas, Steven W. Cole
  • Patent number: 4735193
    Abstract: A process for separating a monosaccharide from an aqueous solution comprising monosaccharides and a second component comprising a polysaccharide. The mixture is contacted with a mixed matrix membrane comprising a adsorbent or molecular sieve material dispersed in an organic polymer in which the monosaccharide has a greater steady state permeability than the polysaccharide. The monosaccharide passes through the membrane, and is recovered. Particular mixed matrix membranes found to be useful in separating mono from polysaccharides are silicalite, gamma-alumina, activated carbon or a calcium exchanged Y-zeolite dispersed in cellulose acetate or polyelectrolyte complex polymers.
    Type: Grant
    Filed: February 8, 1985
    Date of Patent: April 5, 1988
    Assignee: UOP Inc.
    Inventors: Santi Kulprathipanja, Edward W. Funk, Sudhir S. Kulkarni, Y. Alice Chang
  • Patent number: 4736009
    Abstract: Partially alkylated polyamines which may be viewed as low molecular weight polymers of x-amino-y-methylenephenyl are effective curing agents in combination with other polyamines and polyols in reaction injection molding for diverse class of polyisocyanates. Alkylation may range from 5 up to 100 percent to afford polyamines with a board spectrum of cure times, as well as to give elastomers with an interesting and useful diversity of properties. Such polyamines may be used as a constituent in a blend of polyamines as the isocyanate-reactive component, in which case the elastomer may be viewed as predominantly a polyurea, or as a constituent in a blend with polyols, in which case the elastomer may be viewed as an elastomer with both urethane and urea segments.
    Type: Grant
    Filed: December 29, 1986
    Date of Patent: April 5, 1988
    Assignee: UOP Inc.
    Inventors: David W. House, Ray V. Scott, Jr., William M. Baumann
  • Patent number: 4734366
    Abstract: L-fructose may be made by oxidziing L-mannitol with a polyoldehydrogenase from species of the genus Gluconobacter and Acetobacter. In particular, L-fructose may be formed by fermentation of L-mannitol using Gluconobacter oxydans ssp. suboxydans or Acetobacter pasteurianus.
    Type: Grant
    Filed: January 22, 1985
    Date of Patent: March 29, 1988
    Assignee: UOP Inc.
    Inventors: Blaise J. Arena, Albrecht H. Bruckner
  • Patent number: 4734540
    Abstract: A process is presented which is useful for the selective hydrogenation of polyunsaturated organic compounds. The resultant product of such a reaction produces the monoolefinic equivalents of the hydrogenated polyunsaturated organic compounds. The catalyst used in this selective hydrogenation process comprises nickel and sulfur deposited on the surface of an alumina support. The preferred catalyst does not contain halogens, noble metals, alkaline earth metals, or alkali metals and is characterized by having only a very low percentage of the total pore volume being provided by pores having an average pore diameter less than 150 angstroms. The great majority of the pore volume is present in the form of macropores having diameters of 500 to 1500 angstroms.
    Type: Grant
    Filed: July 9, 1987
    Date of Patent: March 29, 1988
    Assignee: UOP Inc.
    Inventors: Mark J. Gattuso, Daniel L. Ellig
  • Patent number: 4732665
    Abstract: An improved catalytic reforming process. The process is operated at high severity in order to obtain a reformate product having an enhanced octane rating. Higher octane reformate is required to compensate for the reduction or total elimination of lead-based additives used in motor gasoline for increasing octane rating, since reformate is a primary component of motor gasoline. High severity operation results in the formation of quantities of polycyclic aromatic compounds whose presence is highly undesirable. These compounds are removed from the vaporous products of the catalytic reforming process by adsorption on an appropriate material. It was totally unexpected to find that these very high molecular weight compounds are present in vapor streams comprised of hydrogen and light normally-gaseous hydrocarbons such as methane, ethane, and propane.
    Type: Grant
    Filed: April 6, 1987
    Date of Patent: March 22, 1988
    Assignee: UOP Inc.
    Inventors: Richard W. Bennett, Paul R. Cottrell, Norman L. Gilsdorf, Michael D. Winfield
  • Patent number: 4731491
    Abstract: Liquefaction of lignin by hydrogenolysis in the presence of a catalytic composition of metal sulfides which are prepared in situ and in the presence of a lower aliphatic alcohol affords substantially increased yields of monophenols. When methanol is used in the presence of a catalyst which is a mixture of the sulfides of divalent iron, copper, and tin the total monophenols can be as high as 65% with the total cresols being about 45%. Phenol, which is used as a liquefying solvent, can itself be formed in good yield when lignin tar is used as the liquefying solvent. This affords the opportunity of conducting the liquefaction in a continuous fashion using two stages of reaction.
    Type: Grant
    Filed: January 22, 1986
    Date of Patent: March 15, 1988
    Assignee: UOP Inc.
    Inventors: Peter Urban, Dusan J. Engel
  • Patent number: 4727209
    Abstract: Hydrocarbon conversion processes including hydrocracking and hydrotreating are performed utilizing a novel phosphorus-modified alumina composite comprising a hydrogel having a molar ratio on an elemental basis of phosphorus to aluminum of from 1:1 to 1:100 together with a surface area of about 140 to 450 m.sup.2 /gm. The composite is prepared by admixing an alumina hydrosol with a phosphorus-containing compound to form a phosphorus-modified sol and gelling said admixture.
    Type: Grant
    Filed: December 12, 1986
    Date of Patent: February 23, 1988
    Assignee: UOP Inc.
    Inventor: Tai-Hsiang Chao
  • Patent number: 4724271
    Abstract: A process for catalytic dehydrocyclodimerization and regeneration of the catalyst. C.sub.2 to C.sub.5 aliphatic hydrocarbons are reacted to produce aromatics, using a water-sensitive catalyst of a composition especially adapted to minimize deposition of coke on the catalyst. The catalyst is comprised of alumina which contains phosphorus, gallium, and a crystalline aluminosilicate having a silica to alumina ratio of at least 12. The use of this catalyst has resulted in a five-fold reduction in the rate of coke deposition, compared to a conventional dehydrocyclodimerization catalyst. However, the activity of this catalyst is significantly reduced by exposure to water at the temperatures normally used in removing the coke, which is accomplished by burning the coke in a combustion zone in the presence of oxygen, producing carbon dioxide and water. At least a portion of the gas leaving the combustion zone catalyst bed is combined with air and recycled back to the combustion zone.
    Type: Grant
    Filed: March 31, 1987
    Date of Patent: February 9, 1988
    Assignee: UOP Inc.
    Inventors: David C. Martindale, Joseph A. Kocal, Tai-Hsiang Chao
  • Patent number: 4721557
    Abstract: A process for the conversion of residual asphaltene-containing hydrocarbonaceous charge stock to selectively produce large quantities of high quality middle distillate while minimizing hydrogen consumption.
    Type: Grant
    Filed: October 8, 1986
    Date of Patent: January 26, 1988
    Assignee: UOP Inc.
    Inventor: Darrell W. Staggs
  • Patent number: 4721807
    Abstract: This invention comprises a process for separating 2,6-toluene diisocyanate from a feed mixture with 2,4-toluene diisocyanate. The process comprises contacting the mixture at adsorption conditions with an adsorbent comprising a Y-type zeolite cation exchanged with a potassium cation, thereby selectively adsorbing the 2,6-toluene diisocyanate. The remainder of the feed mixture is removed from the adsorbent and the adsorbed toluene diisocyanate 2,6-isomer is recovered by desorption at desorption conditions with a desorbent material comprising toluene.
    Type: Grant
    Filed: May 8, 1987
    Date of Patent: January 26, 1988
    Assignee: UOP Inc.
    Inventor: Hermann A. Zinnen
  • Patent number: 4721806
    Abstract: This invention comprises a process for separating 2,4-toluene diisocyanate from a feed mixture with 2,6-toluene diisocyanate. The process comprises contacting the mixture at adsorption conditions with an adsorbent comprising a Y-type zeolite cation exchanged with a cation in the group Na, Ca, Li or Mg, thereby selectively adsorbing the 2,4-toluene diisocyanate. The remainder of the feed mixture is removed from the adsorbent and the adsorbed toluene diisocyanate isomer is recovered by desorption at desorption conditions with a desorbent material comprising toluene.
    Type: Grant
    Filed: May 8, 1987
    Date of Patent: January 26, 1988
    Assignee: UOP Inc.
    Inventor: Hermann A. Zinnen
  • Patent number: 4720336
    Abstract: A catalytic reactor system for effecting the contact of a reactant stream with catalyst particles that are movable by gravity flow through the system, which comprises in combination: (a) a vertically elongated confined reaction chamber; (b) a catalyst loading chamber having a fixed volume located outside of and generally overhead of the reaction chamber whereby fresh catalyst particles gravitationally flow downward into the chamber; (c) concentrically spaced apart wall members which provide an annular-form catalyst-retaining section that is spaced inwardly from the wall of the reaction chamber to additionally provide a manifold space around the section and a cylindrical center pipe volume, the wall members having a perforate screen lower end and an imperforate upper end wherein the imperforate upper end defines a portion of the annular-form catalyst-retaining section having a volume of greater than about 100% of the catalyst loading chamber; (d) an imperforate cover means over the annular-form catalyst-retain
    Type: Grant
    Filed: September 10, 1986
    Date of Patent: January 19, 1988
    Assignee: UOP Inc.
    Inventors: Bipin V. Vora, Norman H. Scott
  • Patent number: 4720536
    Abstract: Urethane prepolymers cured with a blend of an aromatic alkyl diamine and a polyhydric alcohol having more than two hydroxyl groups show excellent compression set and tensile properties. Ratios of diamine to alcohol in the blend, expressed as equivalents, may vary from 1:1 to 19:1, with optimum properties in the elastomer often resulting from blends with the ratio 2:1 to 4:1.
    Type: Grant
    Filed: June 6, 1986
    Date of Patent: January 19, 1988
    Assignee: UOP Inc.
    Inventors: David W. House, Ray V. Scott, Jr.
  • Patent number: 4720579
    Abstract: Citric acid is separated from a fermentation broth by using an adsorbent comprising a neutral, noniogenic, macroreticular, water-insoluble, crosslinked styrene-poly(vinyl)benzene and a desorbent comprising water and, optionally, acetone with the water. The pH of the feed is adjusted and maintained below the first ionization constant (pKa.sub.1) of citric acid to maintain selectivity.
    Type: Grant
    Filed: December 18, 1986
    Date of Patent: January 19, 1988
    Assignee: UOP Inc.
    Inventor: Santi Kulprathipanja
  • Patent number: 4718405
    Abstract: Although feedstocks of L-mannose prepared from hydrocyanation of L-arabinose contain inhibitors to the soluble molybdate-catalyzed epimerization of L-mannose to L-glucose, experimental conditions have been found which minimize such inhibition. A method is presented for improving the yield of L-glucose in a preparative route using hydrocyanation of L-arabinose as the entry to the L-hexoses by incorporating a soluble molybdate-catalyzed empimerrization stage conducted at a pH below 3.0.
    Type: Grant
    Filed: March 23, 1987
    Date of Patent: January 12, 1988
    Assignee: UOP Inc.
    Inventors: Bruce E. Firth, Blaise J. Arena
  • Patent number: 4719007
    Abstract: A process for hydrotreating a hydrocarbonaceous charge stock having hydrogenatable hydrocarbonaceous compounds which process comprises the steps of: (a) contacting said hydrocarbonaceous charge stock in the presence of hydrogen with a hydrogenation catalyst in a hydrotreating reaction zone; (b) contacting said hydrotreating reaction zone effluent with an aqueous scrubbing solution; (c) introducing a resulting admixture of said reaction zone effluent and said aqueous scrubbing solution into a separation zone to provide a hydrotreated hydrocarbonaceous stream having trace quantities of hydrogenatable hydrocarbonaceous compounds and a spent aqueous stream; and (d) contacting said hydrotreated hydrocarbonaceous stream with an adsorbent to remove at least a portion of said trace quantities of hydrogenatable hydrocarbonaceous compounds from said hydrotreated hydrocarbonaceous stream.
    Type: Grant
    Filed: October 30, 1986
    Date of Patent: January 12, 1988
    Assignee: UOP Inc.
    Inventors: Russell W. Johnson, Walter F. Hribik, Lee Hilfman
  • Patent number: 4717779
    Abstract: Dehydrogenatable hydrocarbons may be subjected to a dehydrogenation reaction in which the hydrocarbons are treated with a dehydrogenation catalyst comprising a modified iron catalyst in the presence of steam in a multicatalyst bed system. The reaction mixture containing unconverted hydrocarbons, dehydrogenated hydrocarbons, hydrogen and steam is then contacted with an oxidation catalyst whereby hydrogen is selectively oxidized. The selective oxidation catalyst which is used will comprise a noble metal of Group VIII of the Periodic Table, a metal of Group IVA and, if so desired, a metal of Group IA or IIA composited on a porous inorganic support. The inorganic support will comprise an alumina precursor which possesses and ABD less than about 0.6 g/cc, a pore volume greater than about 0.5 cc/g, and a pore distribution such that between 10% and 70% of the pore volume is present as pores whose diameters are greater than about 300 Angstroms. After peptizing and calcination at a temperature of about 900.degree.
    Type: Grant
    Filed: August 6, 1986
    Date of Patent: January 5, 1988
    Assignee: UOP Inc.
    Inventors: Jeffery C. Bricker, Tamotsu Imai, David E. Mackowiak
  • Patent number: 4717778
    Abstract: This invention comprises a process for separating the minor dinitrotoluene isomers, 2,3-dinitrotoluene and 3,4-dinitrotoluene from a feed mixture comprising 2,4- and 2,6-dinitrotoluene, and the minor isomers, which process comprises contacting the mixtures at adsorption conditions with an adsorbent comprising a Y type, or dealuminated Y type, zeolite, cation exchanged with Na, Ca or H, thereby selectively adsorbing the 2,3- and 3,4- isomers or 2,4- and 2-6 isomers, respectively. The remainder of the feed mixture is removed from the adsorbent and the minor isomers are recovered by desorption at desorption conditions with a desorbent material comprising an alcohol, ketone or an ester.
    Type: Grant
    Filed: October 1, 1985
    Date of Patent: January 5, 1988
    Assignee: UOP Inc.
    Inventors: Hermann A. Zinnen, Thad S. Franczyk
  • Patent number: 4717696
    Abstract: Supported zerovalent palladium used in the hydrogenation of aldose cyanohydrins is rapidly deactivated. A regeneration procedure based on a water wash and acid treatment effectively restores catalyst activity to its original level. Such a regeneration procedure may be used over several cycles to afford a catalyst with essentially unaltered activity.
    Type: Grant
    Filed: October 31, 1986
    Date of Patent: January 5, 1988
    Assignee: UOP Inc.
    Inventor: Blaise J. Arena