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US 2014/0371452 A1Published application
Reductive amination of diethanolamine and resulting product mixture
AssigneeDow Global Technologies LLC
InventorsStephen W. King, Sadeka Onam, Thomas Z. Srnak
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Abstract
The invention provides a method for the reductive amination of diethanolamine to form a product composition that includes piperazine (PIP) and aminoethylethanolamine (AEEA). A catalyst with a transitional alumina/second metal oxide support and a mixture of catalytic metals is used for the reaction which results in low levels of non-PIP and non-AEEA side products.
Claims15
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.
Dependencies are inferred from the claim text.