Patents Represented by Attorney A. H. Fritschler

Find this attorney in the Justia Lawyer Directory

  • Method for gas separation using helically wound hollow fibers permeable membrane cartridge
    Patent number: 4881955
    Abstract: Feed gas is introduced into the bores of a helically wound hollow fiber membrane cartridge containing hollow fibers of essentially uniform active lengths. Permeate gas flow is maintained countercurrent to the feed and raffinate gas entrance and exit axis, respectively, while the directional flow axis of permeate withdrawal can be at a substantial angle to the helically wound hollow fiber membrane surface. Complete radial mixing of the permeate stream on the outer, permeate side and essentially no axial mixing on either the permeate or the raffinate side of the hollow fiber membrane cartridge are maintained.
    Type: Grant
    Filed: September 12, 1988
    Date of Patent: November 21, 1989
    Assignee: Union Carbide Corporation
    Inventors: Benjamin Bikson, Slavatore Giglia
  • Prevention of membrane degradation
    Patent number: 4881953
    Abstract: In the separation of gases in a membrane system, degradation of membrane permeability is prevented by passing the feed gas mixture through a bed of adsorbent material, preferably activated carbon, to adsorb the heavier hydrocarbon contaminants responsible for degradation without removal of lighter hydrocarbons.
    Type: Grant
    Filed: September 15, 1988
    Date of Patent: November 21, 1989
    Assignee: Union Carbide Corporation
    Inventors: Ravi Prasad, Oscar W. Haas
  • Hollow fiber multimembrane cells and permeators
    Patent number: 4880440
    Abstract: Two or more different permeable membranes capable of separating different components of a fluid mixture are used to farbicate hollow fiber multicomponent cells and permeator modules.
    Type: Grant
    Filed: September 12, 1988
    Date of Patent: November 14, 1989
    Assignee: Union Carbide Corporation
    Inventor: Jerry Perrin
  • Treatment of permeable membranes
    Patent number: 4877421
    Abstract: A method for enhancing the long term performance of gas separation membranes. The permeable membranes are heated at a moderate temperature of from about 50.degree. C. to 140.degree. C. Use of this method enables restoration and reclamation of permeable membranes that have suffered degradation in performance in gas separation processes.
    Type: Grant
    Filed: November 2, 1987
    Date of Patent: October 31, 1989
    Assignee: Union Carbide Corporation
    Inventors: Benjamin Bikson, Salvatore Giglia
  • Gas dispersion process and system
    Patent number: 4867918
    Abstract: Gas dispersion in a liquid is enhanced by combining the gas and liquid in close proximity to a venturi or other flow constriction means used to create supersonic flow velocities and subsequent deacceleration to sub-sonic velocity. When a venturi is employed, the gas-liquid mixing occurs in the converging portion of the venturi or upstream but in close proximity to said venturi. Turbulent flow conditions upstream of the venturi or other flow constriction means adequate to disperse the gas uniformly in the liquid are not required and, surprisingly, the gas and liquid need not be uniformly dispersed prior to acceleration to supersonic velocity.
    Type: Grant
    Filed: December 30, 1987
    Date of Patent: September 19, 1989
    Assignee: Union Carbide Corporation
    Inventors: Kazuo Kiyonaga, Lawrence M. Litz, Thomas J. Bergman
  • Oxygen enriched air system
    Patent number: 4867766
    Abstract: Enriched oxygen from a pressure swing adsorption system and air are blended to provide oxygen enriched air of desired purity, particularly for use at flow rates between those for which liquid oxygen and on-site cryogenic air separation plants are desirable.
    Type: Grant
    Filed: September 12, 1988
    Date of Patent: September 19, 1989
    Assignee: Union Carbide Corporation
    Inventors: Michael J. Campbell, James Smolarek, John J. Pietruszewski
  • Method of separating a gas and/or particulate matter from a liquid
    Patent number: 4861352
    Abstract: The present invention relates to a method and apparatus for separating a gas, vapor or particulate matter or combinations thereof from a liquid.The liquid is contacted with a stripping gas or vapor which is immiscible in or which has low solubility in the liquid under operating conditions, which stripping gas or vapor is different from the gas or vapor to be separated from the liquid. The contact is achieved in an in-line stripping device which is capable of accelerating at least a portion of the stripping gas or vapor/liquid composition to a linear velocity which is supersonic for the composition.
    Type: Grant
    Filed: December 30, 1987
    Date of Patent: August 29, 1989
    Assignee: Union Carbide Corporation
    Inventor: Alan T. Cheng
  • Method for preparing composite membranes for enhanced gas separation
    Patent number: 4840819
    Abstract: Composite membranes having advantageous combinations of selectivity and permeability are prepared by the coating of a separation layer on a porous support layer containing a controlled amount of liquid in the range of from about 10% to about 90% by weight of the liquid present in the fully wet support layer.
    Type: Grant
    Filed: April 8, 1987
    Date of Patent: June 20, 1989
    Assignee: Union Carbide Corporation
    Inventors: Samuel C. Williams, Benjamin Bikson, Joyce K. Nelson, Robert D. Burchesky
  • Composite membranes and their manufacture and use
    Patent number: 4826599
    Abstract: A method for producing a composite hollow fiber membrane by coating a porous hollow fiber substrate with a dilute solution of a membrane-forming composition containing a membrane-forming material and a solvent therefor by contacting the porous hollow fiber substrate with the composition, partially evaporating some of the solvent from the coated porous hollow fiber substrate, contacting the partially dried coating porous hollow fiber substrate with a coagulant and recovering the composite hollow fiber membrane. Also included are the composite hollow fiber membranes so produced and their use as permeable membranes for separating at least one fluid from at least one other fluid in a fluid mixture.
    Type: Grant
    Filed: July 10, 1987
    Date of Patent: May 2, 1989
    Assignee: Union Carbide Corporation
    Inventors: Benjamin Bikson, Joyce K. Nelson
  • Composite membranes, their manufacture and their use
    Patent number: 4822382
    Abstract: The present invention is directed to composite membranes having a separation layer comprised of at least one poly(tetramethyl) bisphenol A phthalate resulting in enhanced separation and permeating characteristics. Processes for making these composite membranes and the methods of using them for gas separations are also disclosed.
    Type: Grant
    Filed: November 2, 1987
    Date of Patent: April 18, 1989
    Assignee: Union Carbide Corporation
    Inventor: Joyce K. Nelson
  • Pressure swing adsorption process for gas separation
    Patent number: 4810265
    Abstract: An improved pressure swing adsorption process enables the more readily adsorbable component of a feed gas to be economically recovered, e.g. nitrogen from air. The more readily absorbable component is used as copurge at upper adsorption pressure, and less readily adsorbable component is used for countercurrent purge at subatmospheric desorption pressure and for initial repressurization in a countercurrent backfilling step.
    Type: Grant
    Filed: December 29, 1987
    Date of Patent: March 7, 1989
    Assignee: Union Carbide Corporation
    Inventors: Dale A. Lagree, Frederick W. Leavitt
  • Turndown control method for membrane separation systems
    Patent number: 4806132
    Abstract: Permeable membranes are operated, under reduced demand conditions, by reducing feed flow and the partial pressure driving force across the membrane, using the installed surface area, with product purity and/or flow being reduced. The driving force is reduced by reducing feed pressure and/or increasing permeate side pressure.
    Type: Grant
    Filed: June 23, 1987
    Date of Patent: February 21, 1989
    Assignee: Union Carbide Corporation
    Inventor: Michael J. Campbell
  • Tubesheet for semipermeable membrane devices
    Patent number: 4800019
    Abstract: A method for producing hollow fiber permeable devices having an essentially leak-free seal between the hollow fibers and the tubesheet that consists of heating the tubesheet containing the hollow fibers potted therein at a temperature essentially equal to or greater than the glass transition temperature of the thermoplastic material or the softening point of the thermoset material of the hollow fiber for a period of time sufficient to essentially densify the hollow fibers in the potted portion of the tubesheet and whereby a major portion of the interior diameter of the bores of the hollow fibers embedded in the tubesheet is enlarged; and the fiber permeable devices themselves.
    Type: Grant
    Filed: April 22, 1988
    Date of Patent: January 24, 1989
    Assignee: Union Carbide Corporation
    Inventors: Benjamin Bikson, Salvatore Giglia
  • In-situ pipeline coating system
    Patent number: 4798474
    Abstract: A self-contained trailer mounted proportioning, mixing, injection and collection system enables pipelines to be conveniently coated in-situ using two-component coating compositions moved through the pipeline by a double pig system without solvent vapor exposure, liquid spills or drips, undesired air bubble formation in the coating composition or exposure of operating personnel to pressurized gas, solvent vapors or liquid coating material splash or hazardous flammable or explosive conditions.
    Type: Grant
    Filed: October 22, 1987
    Date of Patent: January 17, 1989
    Assignee: Union Carbide Corporation
    Inventor: Joseph V. Daily
  • Membrane separation system and process
    Patent number: 4787919
    Abstract: A membrane system is positioned within an insulated enclosure heated to maintain superheat conditions for the feed gas to the system, wherein individual membrane modules are not insulated. The feed gas compression heat is desirably used to supply the superheat to the feed gas within the insulated enclosure.
    Type: Grant
    Filed: June 23, 1987
    Date of Patent: November 29, 1988
    Assignee: Union Carbide Corporation
    Inventors: Michael J. Campbell, James Smolarek, Timothy S. Van Lente
  • Two-stage aluminum refining vessel
    Patent number: 4784374
    Abstract: An aluminum refining vessel has two refining stages positioned side-by-side, with flow of molten aluminum into and out of the vessel being from the same side thereof. The vessel is readily adaptable for the reversal of flow therethrough, and for ease of installation, operation and maintenance.
    Type: Grant
    Filed: May 14, 1987
    Date of Patent: November 15, 1988
    Assignee: Union Carbide Corporation
    Inventor: John F. Pelton
  • Composite separation membranes and the preparation and use thereof
    Patent number: 4767422
    Abstract: Composite membranes are post-treated by contact with a volatile solvent, with or without minute amounts of additives, followed by solvent evaporation, to repair defects in the thin separation layer thereof.
    Type: Grant
    Filed: April 8, 1987
    Date of Patent: August 30, 1988
    Assignee: Union Carbide Corporation
    Inventors: Benjamin Bikson, Salvatore Giglia, Gregory Kharas
  • Method and apparatus for quick filling gas cylinders
    Patent number: 4749384
    Abstract: A method and apparatus for quick-filling a full charge of compressed natural gas into an adsorbent filled cylinder.
    Type: Grant
    Filed: April 24, 1987
    Date of Patent: June 7, 1988
    Assignee: Union Carbide Corporation
    Inventors: Jeffert J. Nowobilski, Frank Notaro, Arun Acharya
  • Method for controlling the density of solidified aluminum
    Patent number: 4738717
    Abstract: An aluminum melt is processed by the injection of a sparging gas through a spinning nozzle into the melt in a preheat, conditioning and processing step sequence, with a predetermined proportion of hydrogen being employed with the sparging gas during the processing step to assure that the hydrogen content of the melt is such that the density of the solidified product is within a desired range on a repeatable basis. The conditioning step is employed to facilitate the attaining of the desired result on such repeatable basis in an advantageous manner such as to minimize the processing time and the amount of the hydrogen/sparging gas mixture necessary for the desired density control.
    Type: Grant
    Filed: July 2, 1986
    Date of Patent: April 19, 1988
    Assignee: Union Carbide Corporation
    Inventor: Roger N. Dokken
  • Apparatus for holding and refining of molten aluminum
    Patent number: 4717126
    Abstract: A support plate is used, together with the shell of a vessel for the holding and/or refining of aluminum, in combination with a refractory sheet and a metal heating element container positioned in a graphite block to protect said heating element and to thus extend the life of said heating element. Oxidation of the graphite block is precluded, as is the attack upon the heating element by chlorides passing through the pores of said graphite block.
    Type: Grant
    Filed: February 28, 1986
    Date of Patent: January 5, 1988
    Assignee: Union Carbide Corporation
    Inventor: John F. Pelton