CATALYST OF AMINATION OF ETHANOL AMINE

摘要

A novel amination catalyst comprises an active transition metal uniformly distributed over a porous refractory support of specific surface 10-300 (esp. 30-50)m2/g and pore dia. 5000 angstroms. The metal content of the catalyst is 30-70 wt. %. The metal is pref. Ni, opt. in association with other metals such as Cu or Ni, the Ni content of the active material being >=50%. The catalyst is used for the prodn. of ethylene diamine (ED) and piperazine (PP) from ethanolamine (EA) and NH3. Other useful by-products may also be formed, e.g. diethylene triamine, aminoethyl piperazine, aminoethyl ethanolamine and hydroxyethyl piperazine. The catalyst has high mechanical strength which is retained over long periods of operation (>5000 hrs.). Activity of the catalyst remains constant for long periods (>6 months), and in particular the ED yield is not reduced. The selectivity to ED, PP or heavier amines can be controlled by varying the catalyst parameters.