C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
402/2, 252/95, 2
C07C 209/60 (2006.01) C07C 209/16 (2006.01) C07C 211/13 (2006.01) C07D 295/13 (2006.01)
Patent
CA 2010655
ABSTRACT A process for preparing linearly-extended polyalkylenepolyamines, such as linear and branched polyethylenepolyamines, comprising contacting a difunctional aliphatic alcohol, such as monoethanolamine, with a reactant amine, such as ethylenediamine, in the presence of a catalyst containing (a) a Group VB metal oxide, (b) a niobium phosphate or tantalum phosphate, wherein the mole ratio of phosphorus to niobium or tantalum is no greater than about 1.3, or (c) mixtures thereof. Included among the linearly-extended polyalkylenepolyamines are alcohol- extended piperazines, such as N-(2-hydroxyethyl)- piperazine, and amine-extended piperazines, such as N- (2-aminoethyl)piperazine. 34,713A-F
Bowman Robert G.
Hartwell George E.
Lastovica John E. Jr.
Molzahn David C.
Ramirez Enrique G.
Smart & Biggar
The Dow Chemical Company
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