Patent ID: 9353044
Filing Date: 2016-05-31
CPC Classification: B01J,C07C,C07D

Claim Text:
1. A method of making a piperazine- and aminoethylethanolamine-containing composition comprising steps of: (a) providing a reaction composition comprising diethanolamine; and (b) subjecting the reaction composition to a reductive amination in the presence of ammonia and a catalyst composition, the catalyst composition comprising a support portion and a catalyst portion, the support portion comprising an acidic mixed metal oxide comprising a transitional alumina and a second metal oxide, the catalyst portion comprising a first metal selected from the group consisting of cobalt, nickel, and copper, and a second metal selected from the group consisting of rhenium, ruthenium, rhodium, platinum, palladium, and iridium, wherein reductive amination of diethanolamine forms a product composition comprising piperazine and aminoethylethanolamine; and wherein the transitional alumina is (i) more than 50 weight percent of the alumina contained in the support and (ii) comprises a theta phase alumina, delta phase alumina, or mixtures of theta and delta phase aluminas.