Patents Represented by Law Firm Ancona A. C.
  • Niobium or tantalum catalysts for the preparation of ethylenimine
    Patent number: 4376732
    Abstract: An improved catalyst suitable for the dehydration of an alkanolamine in the vapor phase to produce an alkylenimine which catalyst contains an oxide of niobium or tantalum. Optionally an alkaline earth oxide is employed as a promoter. The catalyst is generally used on an inert low surface area support at a concentration of less than 5% of the tantalum or niobium oxide and less than 0.5% of the promoter oxide.
    Type: Grant
    Filed: July 9, 1981
    Date of Patent: March 15, 1983
    Assignee: The Dow Chemical Co.
    Inventor: Enrique G. Ramirez