Patents Assigned to The Asbestos Institute
  • Dry impregnated manganese zeolite
    Patent number: 4692424
    Abstract: The invention relates to a process for the dry incorporation of manganese ions on the external reactive sites of Zn-ZSM-5 or Zn-ZSM-11 pentasil which comprises mixing a Zn-ZSM-5 or Zn-ZSM-11 zeolite with bentonite, impregnating the dry mixture with a minimum amount of a solution of a manganese salt thereby to form a malleable paste and extruding said paste under pressure whereby the manganese ions are affixed to the surface reactive sites of the treated zeolite and to the zeolite catalyst thus obtained.
    Type: Grant
    Filed: June 17, 1986
    Date of Patent: September 8, 1987
    Assignee: The Asbestos Institute
    Inventor: Raymond Le Van Mao
  • Zeolite catalysts
    Patent number: 4615995
    Abstract: Improved yield in light olefins and aromatics from methanol conversion on Zn and Mn loaded pentasil zeolite and composite pentasil zeolite-asbestos catalysts, the Zn content thereof ranging from 0.1 to 1.0% wt/wt and the Mn content thereof ranging from 0.2 to 5.0% wt/wt. The light olefins/aromatics ratio in the products varies with the Mn content in the catalyst, the cumulative light olefinic and aromatic production being kept constant at a high value (higher than 80% at 450.degree. C.).
    Type: Grant
    Filed: January 3, 1984
    Date of Patent: October 7, 1986
    Assignee: The Asbestos Institute
    Inventor: Raymond Le Van Mao