Patents Assigned to L'Air Liquide-Societe Anonyme a'Directoire et Conseil de Surveillance pour l'Etude et l'Exploitation des Procedures Georges Claude
  • Block polyurethane-ether and polyurea-ether gas separation membranes
    Patent number: 6843829
    Abstract: Gas separation membranes formed from polyether-urethane or polyether-urea block copolymers are useful for separating gases from gas mixtures. The membranes and processes are especially suited for separating polar gases from mixtures that contain polar and non-polar species. The novel membranes exhibit good permeability and permselectivity, as well as durability, making them well suited for industrial applications such as removal of acid gases from natural gas and removal of carbon dioxide from synthesis gas.
    Type: Grant
    Filed: March 13, 2003
    Date of Patent: January 18, 2005
    Assignee: L'Air Liquide-Societe Anonyme a'Directoire et Conseil de Surveillance pour l'Etude et l'Exploitation des Procedures Georges Claude
    Inventor: John W. Simmons