Patents Represented by Attorney James C. Simmon
  • Patent number: 5248322
    Abstract: A pressure swing adsorption process is set forth for the recovery of two gas products at high recovery and high purity using the steps of adsorption, depressurization, evacuation and repressurization. A portion of the depressurization effuent is used to partially accomplish the repressurization step.
    Type: Grant
    Filed: October 1, 1992
    Date of Patent: September 28, 1993
    Assignee: Air Products and Chemicals, Inc.
    Inventor: Ravi Kumar
  • Patent number: 5248646
    Abstract: An amine-boron composition for catalyzing the urethane reaction, particularly in preparing a polyurethane foam, consisting essentially of the addition product of a tertiary amine and a boron compound of the formula R.sub.n B(OH).sub.3-n wheren=0 or 1, andR=C.sub.1 -C.sub.8 alkyl, C.sub.5 -C.sub.8 cycloalkyl or C.sub.6 -C.sub.10 aryl.Preferred catalysts are prepared by mixing triethylenediamine with boric acid.
    Type: Grant
    Filed: June 11, 1992
    Date of Patent: September 28, 1993
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Ann C. L. Savoca, Michael Louie
  • Patent number: 5245831
    Abstract: The present invention relates to an improvement for the production of argon from cryogenic air separation processes. In particular, the improvement comprises using a heat pump cycle to transfer refrigeration from the bottom of the low pressure column to the top of the crude argon column wherein the heat pump cycle employs a heat pump fluid having a nitrogen content equal to or greater than the feed air.
    Type: Grant
    Filed: February 13, 1992
    Date of Patent: September 21, 1993
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Rakesh Agrawal, Terrence F. Yee
  • Patent number: 5246984
    Abstract: This invention relates to a water compatible polyamine-epoxy adduct formed by the reaction of a polyamine with a mixture of a monoepoxide and polyepoxides, the monoepoxide being added in an amount to react with about 10 to 50% of the primary amino groups in said polyamine and the polyepoxides being added in an amount to react with from about 35 to 65% of the remaining primary amino groups.This invention also contemplates a water dispersible blend resin as an amine salt and comprises a water compatible polyamine-epoxy adduct and a resin compatible polyamine-epoxy adduct wherein the water compatible polyamine-epoxy adduct is as described above and the resin compatible polyamine-epoxy adduct is formed by reacting a polyamine with an aromatic monoepoxide, said aromatic monoepoxide reacted in an amount to provide from about 0.4 to 1 equivalents epoxide per primary amino group.
    Type: Grant
    Filed: June 3, 1992
    Date of Patent: September 21, 1993
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Stuart P. Darwen, Daniel A. Cornforth
  • Patent number: 5244695
    Abstract: A method for making a nonwoven filter which comprises impregnating a nonwoven filter substrate with a curable binder composition, the binder composition consisting essentially of(a) 10 to 100 wt% fully hydrolyzed PVOH which has a DPn of 100 to 2300; and(b) 0 to 90 wt% aqueous polymer emulsion, on a solids basis.The preferred aqueous polymer emulsion is an ethylene-vinyl chloride (EVCl) copolymer emulsion or a vinyl acetate/-N-methylolacrylamide (VAc/NMA) copolymer emulsion, or both.
    Type: Grant
    Filed: March 17, 1992
    Date of Patent: September 14, 1993
    Assignee: Air Products and Chemicals, Inc.
    Inventors: George Davidowich, John G. Iacoviello, John S. Sadowski
  • Patent number: 5244615
    Abstract: A multi-step blow molding process for producing fuel containers having excellent resistance to permeation by hydrocarbon fuels and organic fuel additives such as lower alkanols and ethers. In blow molding, a parison is formed from a thermoplastic material, expanded within a closed mold by means of an inflating gas for conforming the parison to the shape of the mold and fluorinated under conditions sufficient to effect surface fluorination of the interior of the parison. The parison is evacuated and the article recovered. The improvement in the blow molding operation comprises pressurizing the parison with a reactive fluorine containing gas containing from 0.1 to 1% fluorine by volume while the parison is at a temperature above its self supporting temperature and for a time sufficient to effect fluorination of the interior surface of the parison.
    Type: Grant
    Filed: December 3, 1992
    Date of Patent: September 14, 1993
    Assignee: Air Products and Chemicals, Inc.
    Inventor: John P. Hobbs
  • Patent number: 5243821
    Abstract: Method and apparatus for delivering high pressure gas to a point of use over a wide range of flowrates by storing said gas as a cryogenic fluid, removing said cryogenic fluid by means of a single stage reciprocating piston-type pump/compressor adapted to utilize liquid, vaporized liquid, a mixture of liquid and vaporized liquid, or supercritical fluid as the inlet fluid to said pump while maintaining the inlet fluid under cryogenic conditions. Blowby from the pump is recycled to the system. Discharge fluid may also be recycled to the system.
    Type: Grant
    Filed: June 24, 1991
    Date of Patent: September 14, 1993
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Thomas W. Schuck, James VanOmmeren
  • Patent number: 5243078
    Abstract: A process for selectively preparing predominantly noncyclic polyalkylene polyamines wherein one or more linear alkyleneamines are reacted in the presence of a mordenite catalyst under conditions sufficient to effect a disproportionation reaction. Preferably, the catalyst is prepared by treating the mordenite with an amount of a phosphorus-containing moiety sufficient to provide a catalyst which is impregnated with from about 0.01 to 15 wt % elemental phosphorus based upon the total weight of the impregnated mordenite catalyst. The process is especially useful in the production of diethylenetriamine wherein ethylenediamine is reacted in the presence of LZ-M-8 catalyst which has been treated with an amount of ammonium dihydrogen phosphate sufficient to provide a catalyst which is impregnated with from about 0.1 to 8 wt % elemental phosphorus based upon the total weight of the impregnated mordenite catalyst. The products can be isolated by conventional techniques such as distillation.
    Type: Grant
    Filed: June 23, 1989
    Date of Patent: September 7, 1993
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Rakesh Agrawal, John H. Frey
  • Patent number: 5242963
    Abstract: A pressure sensitive adhesive composition comprising a vinyl acetate/ethylene/acrylate copolymer emulsion containing 5 to 60 wt % tackifier resin, on a total solids basis.
    Type: Grant
    Filed: April 10, 1991
    Date of Patent: September 7, 1993
    Assignee: Air Products and Chemicals, Inc.
    Inventor: Chung-Ling Mao
  • Patent number: 5240474
    Abstract: Nitrogen is produced by separating air in a pressure swing adsorption process using a high capacity kinetically O.sub.2 selective material as the adsorbent. An example of such an adsorbent is a carbon molecular sieve made from coconut shell char. Such a coconut shell char having a high oxygen volumetric capacity is provided by crushing and sizing coconut shells to form granules which are then heated in flowing inert gas at a temperature ramp rate of about 2 to 12.degree. C. per minute to a peak temperature of 775 to 900.degree. C. which is then held so that the total heating time is up to 8 hours and thereafter the granular char is cooled in an inert gas atmosphere. The granular char thus produced is kinetically selective for O.sub.2 over N.sub.2 without further modification to narrow the openings of its micropores and has an oxygen volumetric capacity in excess of 8.0 cc/cc at 1 atm. and ambient temperature.
    Type: Grant
    Filed: January 30, 1992
    Date of Patent: August 31, 1993
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Steven R. Auvil, Joan M. Schork, Rajagopalan Srinivasan
  • Patent number: 5240970
    Abstract: A method for preparing a polyurethane foam which comprises reacting an organic polyisocyanate and a polyol in the presence of a blowing agent, cell stabilizer and a catalyst composition which comprises a quaternary ammonium carboxylate inner salt having the following formula I ##STR1## where R.sub.1 -R.sub.3 are independently C.sub.1 -C.sub.12 alkyl, C.sub.5 -C.sub.8 cycloalkyl or a heterocycle, C.sub.6 -C.sub.10 aryl or heteroaromatic. R.sub.1 and R.sub.2 or R.sub.1 -R.sub.3 together with the nitrogen atom can also be part of nitrogen containing ring system such as piperdine, morpholine, triethylenediamine, imidazole, or 1,8-diazabicyclo-[5.4.0]-undec-7-ene. R.sub.4 is a divalent R.sub.1.
    Type: Grant
    Filed: January 8, 1993
    Date of Patent: August 31, 1993
    Assignee: Air Products and Chemicals, Inc.
    Inventors: James D. Nichols, Ann C. L. Savoca, Mark L. Listemann
  • Patent number: 5240473
    Abstract: This invention relates to a process for restoring permeance of an oxygen-permeable ion transport membrane utilized to recover oxygen from an oxygen-containing gaseous mixture which contains water, carbon dioxide or volatile hydrocarbons. The process utilizes a class of ion transport membranes formed from multicomponent metallic oxides wherein permeance of such membranes had been believed to be permanently degraded by water and the like under conventional process operating temperatures. This invention provides a continuous process for restoring oxygen permeance of such membranes caused by deleterious interaction between the membrane and components such as carbon dioxide, water or hydrocarbons at elevated process temperatures.
    Type: Grant
    Filed: September 1, 1992
    Date of Patent: August 31, 1993
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Michael F. Carolan, Paul N. Dyer, James M. LaBar, Sr., Robert M. Thorogood
  • Patent number: 5240472
    Abstract: This invention pertains to an improved process for the removal of moisture from a moisture laden gas stream such as air utilizing a membrane dryer unit. The membrane dryer unit is equipped such that it incorporates a selective surface flow adsorbent membrane consisting essentially of an inorganic membrane material selected from the group consisting of alumina and silica gel membranes wherein the membrane has a thickness of approximately 0.5 to 50 microns with a mean pore size of less than about 15 A and preferably within about 4 to 10 A. In the cryogenic separation of air, an air stream contaminated with moisture and carbon dioxide is passed through the membrane dryer unit in countercurrent flow to a dry purge gas, wherein the water is selectively removed from the air stream. The partially dried air stream then is conveyed to an adsorption system operated under thermal swing or pressure swing conditions wherein the residual water and carbon dioxide are removed.
    Type: Grant
    Filed: May 29, 1992
    Date of Patent: August 31, 1993
    Assignee: Air Products and Chemicls, Inc.
    Inventor: Shivaji Sircar
  • Patent number: 5240476
    Abstract: A process for recovery of hydrogen sulfide-free fuel, while maintaining desirable carbon dioxide for combustion in a gas turbine to recover power in an integrated gasification combined cycle power plant and obtaining a rich hydrogen sulfide Claus plant feed gas is described.
    Type: Grant
    Filed: September 7, 1990
    Date of Patent: August 31, 1993
    Assignee: Air Products and Chemicals, Inc.
    Inventor: William P. Hegarty
  • Patent number: 5240480
    Abstract: The present invention relates to novel multi-layer composite solid state membranes which are capable of separating oxygen from oxygen-containing gaseous mixtures at elevated temperatures. The membranes comprise a multicomponent metallic oxide porous layer having an average pore radius of less than about 10 micrometers and a multicomponent metallic oxide dense layer having no connected through porosity wherein the porous and dense layers are contiguous and such layers conduct electrons and oxygen ions at operating temperatures.
    Type: Grant
    Filed: September 15, 1992
    Date of Patent: August 31, 1993
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Robert M. Thorogood, Rajagopalan Srinivasan, Terrence F. Yee, Miles P. Drake
  • Patent number: 5238894
    Abstract: An amine-boron composition for catalyzing the urethane reaction, particularly in preparing a polyurethane foam, consisting essentially of the addition product of a tertiary amine and a boron compound of the formulaR.sub.n B(OH).sub.3-nwheren=0 or 1, andR=C.sub.1 -C.sub.8 alkyl, C.sub.5 -C.sub.8 cycloalkyl or C.sub.6 -C.sub.10 aryl.Preferred catalysts are prepared by mixing triethylenediamine or 3-quinuclidinol with boric acid.
    Type: Grant
    Filed: June 10, 1992
    Date of Patent: August 24, 1993
    Assignee: Air Products and Chemcials, Inc.
    Inventors: Ann C. L. Savoca, Michael Louie, Mark L. Listemann
  • Patent number: 5239098
    Abstract: High capacity solid state cyanocobaltate complexes represented by the chemical formula:Li.sub.3 [Co(CN).sub.5 ].cndot.1.42 DMF.cndot.0.48 DMACwhereDMF is N,N-dimethylformamide andDMAC if N,N-dimethylacetamideare capable of chemically binding oxygen to form novel oxygen adducts, thereby selectively removing oxygen from an oxygen-containing fluid stream. The bound oxygen may be recovered from the complexes by increasing the temperature or by reducing the partial pressure of O.sub.2 above the adduct.
    Type: Grant
    Filed: November 25, 1991
    Date of Patent: August 24, 1993
    Assignee: Air Products and Chemicals, Inc.
    Inventor: Dorai Ramprasad
  • Patent number: 5239112
    Abstract: The present invention relates to a process for preparing acetals and hemiacetal esters which comprises reacting a vinyl ester and an alcohol in the presence of a solvent having a dielectric constant of between about 15 and about 50 and an effective amount of palladium- or platinum-containing catalyst, in the absence of an active support, under reaction conditions sufficient to form the acetal or hemiacetal ester and recovering the acetal or hemiacetal ester.
    Type: Grant
    Filed: November 12, 1992
    Date of Patent: August 24, 1993
    Assignee: Air Products and Chemicals, Inc.
    Inventor: Mark L. Listemann
  • Patent number: 5236964
    Abstract: A method for preparing a reduced density MDI based polyurethane foam by reacting a polyol with an MDI composition using at least 4 parts by weight water based on 100 parts of polyol as the blowing agent and a catalyst composition consisting essentially of the addition product of triethylenediamine and a boron compound of the formulaR.sub.n B(OH).sub.3-nwheren=0 or 1, andR=C.sub.1 -C.sub.8 alkyl, C.sub.5 -C.sub.8 cycloalkyl or C.sub.6 -C.sub.10 aryl.
    Type: Grant
    Filed: December 4, 1992
    Date of Patent: August 17, 1993
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Ann C. L. Savoca, Alan M. Franson
  • Patent number: 5234544
    Abstract: Secondary pulp is deinked and bleached by contacting the pulp simultaneously with oxygen, alkali, and a surfactant in a reaction zone followed by washing to recover a secondary fiber product. Simultaneous contacting with oxygen and surfactant yields higher pulp brightness than sequential contacting in oxygen bleaching and washing stages, and enhances bleachability in further bleaching stages.
    Type: Grant
    Filed: November 13, 1991
    Date of Patent: August 10, 1993
    Assignee: Air Products and Chemicals, Inc.
    Inventor: Ronald C. Naddeo