Organic compounds -- part of the class 532-570 series – Organic compounds – Nitrogen attached directly or indirectly to the purine ring...
Patent
1990-06-22
1991-12-17
Shen, Cecilia
Organic compounds -- part of the class 532-570 series
Organic compounds
Nitrogen attached directly or indirectly to the purine ring...
544357, 544382, 544383, 544402, 564479, 564480, C07D29500, C07C20900
Patent
active
050736353
ABSTRACT:
A process of preparing linearly-extended polyalkylenepolyamines, such as linear and branched polyethylenepolyamines, comprising contacting a difunctional aliphatic alcohol, such as monoethanolamine, with a reactant aliphatic amine, such as ethylenediamine, in the presence of a metal silicate catalyst wherein the metal is selected from Groups IIIB, IVB, VB and the lanthanide rare earth metals. Reactions of piperazines with alkanolamines to yield alcohol-extended and/or amine-extended piperazines are included in the process of this invention.
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Bowman Robert G.
Hartwell George E.
Molzahn David C.
Shen Cecilia
The Dow Chemical Company
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