Patents by Inventor Okan M. Ekiner

Okan M. Ekiner has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 7025804
    Abstract: A method of separating or concentrating hydrocarbon-containing gas mixtures such as hydrogen from hydrocarbons, carbon dioxide from hydrocarbons, nitrogen from hydrocarbons, and hydrocarbons from one another using a selectively permeable membrane. The method is well suited to separate hydrocarbon-containing mixtures such as those generated by petroleum refining industries, petrochemical industries, natural gas processing, and the like. The membranes exhibit extremely good resistance to plasticization by hydrocarbon components in the gas mixture under practical industrial process conditions.
    Type: Grant
    Filed: November 25, 2003
    Date of Patent: April 11, 2006
    Assignee: L'Air Liquide, Societe Anonyme A Directoire et Conseil De Surveillance Pour L'Etude et L'Exploitation Des Procedes Georges Claude
    Inventors: John W. Simmons, Sudhir Kulkarni, Okan M. Ekiner
  • Publication number: 20040159233
    Abstract: A method of separating or concentrating hydrocarbon-containing gas mixtures such as hydrogen from hydrocarbons, carbon dioxide from hydrocarbons, nitrogen from hydrocarbons, and hydrocarbons from one another using a selectively permeable membrane. The method is well suited to separate hydrocarbon-containing mixtures such as those generated by petroleum refining industries, petrochemical industries, natural gas processing, and the like. The membranes exhibit extremely good resistance to plasticization by hydrocarbon components in the gas mixture under practical industrial process conditions.
    Type: Application
    Filed: November 25, 2003
    Publication date: August 19, 2004
    Inventors: John W. Simmons, Sudhir Kulkarni, Okan M. Ekiner
  • Patent number: 5618332
    Abstract: Gas separation membranes having enhanced selectivity for a mixture of gases is disclosed. The membranes may be asymmetric or multicomponent. The membranes surprisingly provide selectivity for gases in a mixture that approaches the relative selectivity of the single gas components. Preferably the membrane provides selectivity for a mixture of gases which is at least 65%, preferably 80%, of the relative selectivity of the corresponding single gases. A process for making improved gas separation membranes is also disclosed.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: April 8, 1997
    Assignee: L'Air Liquide, S.A.
    Inventors: Okan M. Ekiner, Gregory K. Fleming
  • Patent number: 5608014
    Abstract: The present invention provides a three-component blend of (i) certain aromatic polyethersulfones, (ii) certain aromatic polyimides, and (iii) certain aromatic polyimides, polyamides or polyamide-imides or mixtures thereof. The blends provide gas separation membranes with superior gas transport properties.
    Type: Grant
    Filed: April 17, 1995
    Date of Patent: March 4, 1997
    Assignee: L'Air Liquide, S.A.
    Inventor: Okan M. Ekiner
  • Patent number: 5468430
    Abstract: A process for making gas separation membranes having enhanced selectivity for a mixture of gases is disclosed. The membranes may be asymmetric or multicomponent. The membranes surprisingly provide selectivity for gases in a mixture that approaches the relative selectivity of the single gas components. Preferably the membrane provides selectivity for a mixture of gases which is at least 65%, preferably 80%, of the relative selectivity of the corresponding single gases.
    Type: Grant
    Filed: May 19, 1994
    Date of Patent: November 21, 1995
    Assignee: L'Air Liquide S.A.
    Inventors: Okan M. Ekiner, Gregory K. Fleming
  • Patent number: 5310415
    Abstract: Novel polyimide and polyamide-imide gas separation membranes and the process of using such membranes to separate one or more gases from a gaseous mixture is disclosed. The polyimides and polyamide-imides are formed from a blend of diamines containing the ester derived from 1,3-diamino-2-hydroxypropane.
    Type: Grant
    Filed: May 5, 1993
    Date of Patent: May 10, 1994
    Assignees: E. I. Du Pont de Nemours and Company, L'Air Liquides, SA
    Inventors: John W. Simmons, Okan M. Ekiner
  • Patent number: 5248319
    Abstract: The present invention provides for gas separation membranes with superior gas transport properties made from a blend of certain polymers. In particular, certain alkyl substituted aromatic polyimides, polyamides or polyamide-imides are blended with certain aromatic polyimides to provide a gas separation membrane with superior productivity and good selectivity.
    Type: Grant
    Filed: September 2, 1992
    Date of Patent: September 28, 1993
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Okan M. Ekiner, John W. Simmons
  • Patent number: 5232472
    Abstract: Novel polyimide and polyamide-imide gas separation membranes and the process of using such membranes to separate one or more gases from a gaseous mixture is disclosed. The polyimides and polyamide-imides are formed from a blend of diamines containing the ester derived from 1,3-diamino-2-hydroxypropane.
    Type: Grant
    Filed: November 3, 1992
    Date of Patent: August 3, 1993
    Assignees: E. I. Du Pont de Nemours and Company, L'Air Liquide S.A.
    Inventors: John W. Simmons, Okan M. Ekiner
  • Patent number: 5102600
    Abstract: Improved polymeric membranes and their method of manufacture are disclosed. The improved membranes are produced by increasing the draw ratio employed during the manufacture of the membrane. The membranes show at least substantially constant or increased selectivity and mechanical properties as the draw ratio is increased.
    Type: Grant
    Filed: August 20, 1991
    Date of Patent: April 7, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Okan M. Ekiner, George Vassilatos
  • Patent number: 5091216
    Abstract: A process is disclosed for sealing gas separation membranes through treatment with two monomeric materials which condense with each other to form a polymer such as a diamine and a di- or tri- acyl chloride.
    Type: Grant
    Filed: December 5, 1990
    Date of Patent: February 25, 1992
    Assignees: E. I. Du Pont de Nemours and Company, L'Air Liquide, S.A.
    Inventors: Okan M. Ekiner, Richard A. Hayes, Philip Manos
  • Patent number: 5085774
    Abstract: Improved polymeric membranes and their method of manufacture are disclosed. The improved membranes are produced by increasing the draw ratio employed during the manufacture of the membrane. The membranes show at least substantially constant or increased selectivity and mechanical properties as the draw ratio is increased.
    Type: Grant
    Filed: August 30, 1990
    Date of Patent: February 4, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Okan M. Ekiner, George Vassilatos
  • Patent number: 5085676
    Abstract: A process for preparing multicomponent gas separation membranes is disclosed. The process involves casting two or more solutions of polymer, and partially removing solvent from the side of the cast polymer that is to form the gas separation layer of the membrane. The membrane is then quenched to freeze its structure and then the remainder of the solvent removed to form the gas separation membrane.
    Type: Grant
    Filed: December 4, 1990
    Date of Patent: February 4, 1992
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Okan M. Ekiner, Richard A. Hayes, Phillip Manos
  • Patent number: 5015270
    Abstract: A permselective polyimide membrane having phenylindane residues incorporated into the polyimide backbone chain exhibiting high selectivity while maintaining good gas permeation rates and a process for using.
    Type: Grant
    Filed: October 10, 1989
    Date of Patent: May 14, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Okan M. Ekiner, Richard A. Hayes
  • Patent number: 4983191
    Abstract: A process of producing a polyimide gas separation membranes comprising adding an oligomeric or polymeric aromatic epoxy resin to the dope solution, the resin being soluble in the polyimide or polyamic acid precursor, the solvent and the final membrane and the membrane comprising a blend of the polyimide and the resin.
    Type: Grant
    Filed: October 10, 1989
    Date of Patent: January 8, 1991
    Assignees: E. I. Du Pont de Nemours and Company, L'Air Liquide S.A.
    Inventors: Okan M. Ekiner, Richard A. Hayes
  • Patent number: 4863496
    Abstract: A process for applying and polymerizing a monomeric material to a gas separation membrane to improve the permselectivity of the membrane with respect to at least one pair of gases is disclosed.
    Type: Grant
    Filed: April 13, 1988
    Date of Patent: September 5, 1989
    Assignee: E. I. Du Pont de Nemours and Co.
    Inventors: Okan M. Ekiner, Richard A. Hayes, Philip Manos
  • Patent number: 4408038
    Abstract: In-line continuous coagulation and agglomeration of fluoroelastomers produced by emulsion polymerization permits direct processing of fluoroelastomer latex into mechanical dewatering devices. Coagulant is injected into the fluoroelastomer latex countercurrent and under high pressure atomization and residence time prior to mechanical dewatering is controlled.
    Type: Grant
    Filed: March 29, 1982
    Date of Patent: October 4, 1983
    Assignee: E. I. Du Pont de Nemours & Co.
    Inventors: Robert A. Covington, Jr., Okan M. Ekiner
  • Patent number: 4228005
    Abstract: A method is provided for isolating an elastomer from a mixture of the elastomer and water containing up to about 90% by weight water by feeding the mixture into a thermally controlled, vertical separator containing a rotating screw, simultaneously feeding excess water under pressure into the separator, withdrawing concentrated elastomer containing less than about 10% by weight total volatiles (including water) from the metering section of the separator and withdrawing feed water and excess water from a water discharge port located near the upper end of the separator.In addition, apparatus for isolating elastomers from mixtures of elastomers and water is provided.
    Type: Grant
    Filed: June 19, 1978
    Date of Patent: October 14, 1980
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Robert A. Covington, Jr., Okan M. Ekiner
  • Patent number: 4132845
    Abstract: A method is provided for isolating an elastomer from a mixture of the elastomer and water containing up to about 90% by weight water by feeding the mixture into a thermally controlled, vertical separator containing a rotating screw, simultaneously feeding excess water under pressure into the separator, withdrawing concentrated elastomer containing less than about 10% by weight total volatiles (including water) from the metering section of the separator and withdrawing feed water and excess water from a water discharge port located near the upper end of the separator.In addition, apparatus for isolating elastomers from mixtures of elastomers and water is provided.
    Type: Grant
    Filed: May 27, 1977
    Date of Patent: January 2, 1979
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Robert A. Covington, Jr., Okan M. Ekiner