Patent ID: 8927712
Filing Date: 2015-01-06
Classification: B01J,C07D

Abstract:
1. A process for the preparation of a mono-N-alkylpiperazine of the formula I in which R which comprises reacting diethanolamine (DEOA) of the formula II with a primary amine of the formula H (i) an oxidic material comprising copper oxide, aluminum oxide and lanthanum oxide is provided, (ii) pulverulent metallic copper and/or copper flakes and optionally graphite is added to the oxidic material, (iii) the mixture resulting from step ii is shaped to give a molding, where the oxidic material is obtainable by simultaneous or successive precipitation of the component copper oxide, of the component aluminum oxide and of the component lanthanum oxide and subsequent drying and calcination and, after the shaping according to step iii, the catalyst molding is calcined again.