Patents Represented by Attorney J. C. Simmons
  • Patent number: 4711645
    Abstract: Reduction in energy consumption is had in a system for adsorptive removal of moisture and CO.sub.2 from atmospheric air by passing the feed air through consecutive beds of adsorbent comprising first alumina then molecular sieve zeolite, at near ambient temperature during adsorption of these impurities and subsequent regeneration of the sorbent laden beds by pressure reduction to about atmospheric level and purge at that level with product gas freed of water and CO.sub.2.
    Type: Grant
    Filed: February 10, 1986
    Date of Patent: December 8, 1987
    Assignee: Air Products and Chemicals, Inc.
    Inventor: Ravi Kumar
  • Patent number: 4708860
    Abstract: A chemical absorptive separation of air in multiple stage of absorption and desorption is performed with partial recycle of absorbent between stages of desorption necessary to match equilibrium conditions in the various stages of absorption. This allows reduced absorbent flow, reduced energy demand and reduced capital costs.
    Type: Grant
    Filed: December 29, 1986
    Date of Patent: November 24, 1987
    Assignee: Air Products and Chemicals, Inc.
    Inventor: Robert F. Weimer
  • Patent number: 4707170
    Abstract: The present invention is a process for phase separating, dephlegmating and optionally distilling a feed gas stream to recover a light gas product and a heavy hydrocarbon product wherein a predominant amount of the refrigeration for the process is provided by a two temperature and two pressure stage multicomponent closed-circuit refrigeration cycle.
    Type: Grant
    Filed: July 23, 1986
    Date of Patent: November 17, 1987
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Calvin L. Ayres, Howard C. Rowles
  • Patent number: 4705548
    Abstract: Liquid nitrogen, oxygen and/or argon are produced from a cryogenic distillative separation efficiently and economically using a combination of air recycle and nitrogen recycle to produce a liquid product.
    Type: Grant
    Filed: April 25, 1986
    Date of Patent: November 10, 1987
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Rakesh Agrawal, Steven R. Auvil
  • Patent number: 4705541
    Abstract: Adjusted gas compositions having two or more components in desired proportions for particular industrial uses are obtained from available feed gas mixtures accompanied by recovery of one or more valuable individual gases of high purity, by a novel selective adsorption-desorption scheme carried out in a multi-column PSA system. Following initial adsorption of one or more components from the feed gas mixture at high pressure the sorbate-laden column is subjected to a high pressure rinse using as rinse gas the previously recovered more strongly adsorbed species. After the rinsing step, the column is depressured to a selected level and purged with part of the unsorbed gas effluent discharged during the initial adsorption step until a preset amount of the earlier sorbed gas is recovered in the purge effluent as the readjusted binary gas mixture of desired proportions.
    Type: Grant
    Filed: February 12, 1987
    Date of Patent: November 10, 1987
    Assignee: Air Products and Chemicals, Inc.
    Inventor: Shivaji Sircar
  • Patent number: 4684514
    Abstract: An improved method of recovering sulfur from a hydrogen sulfide-containing gas stream which removes water concurrently with the condensation of sulfur and which can be operated at high pressure.
    Type: Grant
    Filed: July 22, 1985
    Date of Patent: August 4, 1987
    Assignee: Air Products and Chemicals, Inc.
    Inventor: Michael S. Chen
  • Patent number: 4681867
    Abstract: A Fischer-Tropsch catalyst and a method of making the catalyst for a Fischer-Tropsch process utilizing the catalyst by which synthesis gas, particularly carbon-monoxide rich synthesis gas, is selectively converted to higher hydrocarbons of relatively narrow carbon number range is disclosed. In general, the selective and notably stable catalyst, consist of an inert carrier first treated with a Group IV B metal compound (such as zirconium or titanium), preferably an alkoxide compound, and subsequently treated with an organic compound of a Fischer-Tropsch metal catalyst, such as cobalt, iron or ruthenium carbonyl. Reactions with air and water and calcination are specifically avoided in the catalyst preparation procedure.
    Type: Grant
    Filed: May 13, 1986
    Date of Patent: July 21, 1987
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Paul N. Dyer, Ronald Pierantozzi, Howard P. Withers
  • Patent number: 4677827
    Abstract: A process is described for the recovery of net power during the depressurization of natural gas from high pressure pipeline conditions to low pressure end user conditions wherein the natural gas is rewarmed to a relatively warm temperature greater than 35.degree. F. using renewable energy and ambient atmosphere.
    Type: Grant
    Filed: February 22, 1985
    Date of Patent: July 7, 1987
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Thirthahalli A. Shenoy, John C. Tao
  • Patent number: 4675037
    Abstract: A portion of the boiloff from LNG storage container is revaporized and recycled during reliquefaction process to control the concentration of nitrogen and to provide upper limit temperature control.
    Type: Grant
    Filed: February 18, 1986
    Date of Patent: June 23, 1987
    Assignee: Air Products and Chemicals, Inc.
    Inventor: Charles L. Newton
  • Patent number: 4597807
    Abstract: A method for operating a continuous rotary carburizing furnace is disclosed, wherein a carburizing mixture is introduced into the furnace retort without inerts while an inert gas is introduced into the shell of the furnace without carbon containing gases. The method effects an increase in productivity through an increased rate of carburization of work pieces with less carburization or sooting of the furnace apparatus.
    Type: Grant
    Filed: November 13, 1984
    Date of Patent: July 1, 1986
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Michael L. Fenstermaker, Mark A. Pellman
  • Patent number: 4482690
    Abstract: This invention pertains to the manufacture of polyurethane-urea elastomers formed by reacting a prepolymer of an organic polyisocyanate and a compound having at least two Zerewitenoff active hydrogen atoms with a chain extender comprising t-butylbenzenediamine. The utilization of t-butylbenzenediamine as an aromatic diamine chain extender imparts flexibility in the handling of reactable compositions due to an increase in pot life and imparts excellent tensile modulus to the resulting polymer.
    Type: Grant
    Filed: February 9, 1984
    Date of Patent: November 13, 1984
    Assignee: Air Products and Chemicals, Inc.
    Inventor: Gus G. Orphanides
  • Patent number: 4449978
    Abstract: A nonwoven product formed from a nonwoven web of fibers bonded together with a binder comprising an interpolymer of vinyl acetate/ethylene/N-methylol acrylamide/acrylamide, the interpolymer comprising about 5 to 40 wt % ethylene and an amount of N-methylol acrylamide and acrylamide which is about 3.0 to 10 wt % of the interpolymer, the N-methylol acrylamide being about 1.75 to 3.5 wt % and the acrylamide about 1.25 to 8.25 wt %. Such nonwoven products have a low residual free formaldehyde content and good tensile properties.
    Type: Grant
    Filed: April 1, 1983
    Date of Patent: May 22, 1984
    Assignee: Air Products and Chemicals, Inc.
    Inventor: John G. Iacoviello
  • Patent number: 4446320
    Abstract: Certain hydrogen phosphate and pyrophosphate compositions are employed as catalysts for organic condensation reactions. Specifically, a diglycolamine compound is converted to a morpholine compound in the presence of such a catalyst.
    Type: Grant
    Filed: December 20, 1982
    Date of Patent: May 1, 1984
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Victoria Eskinazi, James E. Wells
  • Patent number: 4436842
    Abstract: This invention relates to a polyamine composition suited for catalytically effecting reaction between organic polyisocyanate and an active hydrogen compound as measured by the Zerewitinoff method e.g. a polyol, a polyester polyol of polyether in the manufacture of urethane compositions.
    Type: Grant
    Filed: September 3, 1982
    Date of Patent: March 13, 1984
    Assignee: Air Products and Chemicals, Inc.
    Inventor: Howard L. Harwell
  • Patent number: 4421530
    Abstract: An adiabatic-isothermal swing absorption process is disclosed for the removal of essentially all oxygen contained in an inert gas stream. The oxygen is absorbed from an inert gas stream adiabatically on to a dioxygen absorbent and then desorbed from the absorbent isothermally by the use of external heat. The process method utilizes at least two switching beds of the dioxygen absorbent in which one bed is in an absorbing mode while the other bed is in a desorbing mode.
    Type: Grant
    Filed: September 13, 1982
    Date of Patent: December 20, 1983
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Augustine I. Dalton, Jr., John J. Sheridan, III, David A. Zagnoli
  • Patent number: 4421531
    Abstract: An adiabatic pressure swing absorption process is disclosed for the removal of essentially all oxygen contained in an inert gas stream in minor amounts. The oxygen is absorbed and desorbed adiabatically from a dioxygen sorbent. Optionally, an inert purge gas can be utilized to improve the desorption of oxygen from the dioxygen sorbent. The process utilizes at least two switching beds of the dioxygen sorbent in which one bed is in an absorbing mode while the other bed is in a desorbing mode.
    Type: Grant
    Filed: September 13, 1982
    Date of Patent: December 20, 1983
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Augustine I. Dalton, Jr., John J. Sheridan, III, David A. Zagnoli
  • Patent number: 4420591
    Abstract: This invention relates to an improvement for reducing the amount of wall fouling in the suspension polymerization of vinyl chloride. The improvement resides in wetting the reactor surface with a solution containing selenous acid prior to charging the vinyl chloride recipe to the reactor. Preferably, the surface of the resulting reactor is heated at a temperature of from 40.degree.-100.degree. C. prior to charging the recipe.
    Type: Grant
    Filed: April 5, 1982
    Date of Patent: December 13, 1983
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Lawrence K. Wempe, Bernard D. Bauman
  • Patent number: 4417449
    Abstract: A process is described for the separation of carbon dioxide and sulfide gases from oil shale retorting off-gases, coal gasification off-gases, oxygen fireflooding off-gases or carbon dioxide miscible flood enhanced oil recovery off-gases for recycle to a retort, gasifier, petroleum reservoir or to further sulfide processing prior to export. The process separates the off-gases into an essentially sulfur-free light BTU fuel gas, a heavy hydrocarbon stream and a carbon dioxide acid gas stream wherein the off-gas is compressed if necessary and cooled to separate the various streams. The carbon dioxide acid gas stream is expanded in an auto-refrigeration step to provide the necessary process refrigeration. In the oil shale retort and coal gasification applications the sulfur constituents are sorbed on spent oil shale particles or coal ash.
    Type: Grant
    Filed: January 15, 1982
    Date of Patent: November 29, 1983
    Assignee: Air Products and Chemicals, Inc.
    Inventors: William P. Hegarty, William P. Schmidt
  • Patent number: 4417855
    Abstract: A high speed turbo disc mounting assembly for the reduction of turbo disc failure and the provision for disc migration radially at high speeds comprising a shaft, a bushing mounted on said shaft having an annular flange through which torque pin apertures are provided, and a turbo disc mounted on said bushing such that torque pins aligned in channels at the interface of the disc and bushing provide for rotational engagement of the disc to the bushing without restricting outward migration of the disc or imparting undue stress concentrations to the high dynamic stress level area of said disc.
    Type: Grant
    Filed: June 8, 1981
    Date of Patent: November 29, 1983
    Assignee: Air Products and Chemicals, Inc.
    Inventor: Robert E. Jepsen
  • Patent number: 4400188
    Abstract: A process is described in which gaseous nitrogen is recovered from air in a cryogenic air separation unit containing a single distillation column wherein the product nitrogen is compressed and a portion of the compressed nitrogen is recycled to the column to provide reboil in the bottom of said column and reflux at the top of said column. A waste crude oxygen stream is expanded to provide refrigeration for the air separation unit.
    Type: Grant
    Filed: October 27, 1981
    Date of Patent: August 23, 1983
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Suresh U. Patel, Thomas E. Cormier, Keith B. Wilson