C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 209/00 (2006.01) C07C 211/14 (2006.01)
Patent
CA 2446989
The invention relates to a process for the manufacture of diethylenetriamine and higher polyethylenepolyamines by a transamination of ethylenediamine. The transamination is performed at a temperature from 135~C to 180~C at a pressure from 5 Mpa to 40 Mpa in the presence of hydrogen and a particulate catalysts containing 26 to 65% by weight of nickel on an oxide carrier. A high conversion degree of ethylenediamine and a high selectivity to form acyclic polyethylenepolyamines, such as diethylenetriamine are obtained by the process. The formation of cyclic amine compounds, e.g. piperazine, is low.
L'invention se rapporte à un procédé de fabrication de diéthylènetriamine et de polyéthylènepolyamines supérieures par transamination d'éthylènediamine. Cette transamination est faite à une température comprise entre 135 ·C et 180 ·C à une pression comprise entre 5 MPa et 40 MPa en présence d'hydrogène et d'un catalyseur particulaire contenant 26 à 65 % en poids de nickel sur un support d'oxyde. Ce procédé permet d'obtenir un degré de conversion élevé d'éthylènediamine et une sélectivité élevée afin de former des polyéthylènepolyamines acycliques. La formation de composés d'amine cyclique, la pipérazine par exemple, est faible.
Ekenberg Kristina
Lif Johan
Akzo Nobel Nv
Macrae & Co.
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