C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
252/111, 402/364
C08G 73/02 (2006.01) B01J 21/06 (2006.01) B01J 27/16 (2006.01) B01J 37/03 (2006.01) C07C 209/16 (2006.01)
Patent
CA 1335447
This invention relates to a method for the preparation of predominantly linear polyethylenepolyamines by reacting ethylenediamine with monoethanolamine in the presence of a phosphorus/titania/zirconia catalyst. The catalysts that are used in accordance with the present invention are composed of phosphorus, titania and zirconia. They are prepared by mixing solutions of a tetravalent compound of titanium with a tetravalent compound of zirconium, treating the solution to simultaneously heterogeneously coprecipitate titania and zirconia to form a heterogeneous titania/zirconia support, recovering the coprecipitate, treating it with a compound of phosphorus to bond from about 0.5 to 6 wt. % of phosphorus to the coprecipitate and then stabilizing the resultant catalyst by calcining it at about 200° to about 800°C.
592440
Grice Neal John
Knifton John Frederick
Yang Chau-Hwa
Smart & Biggar
Union Carbide Corporation
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