Selective preparation of diethylenetriamine
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United States of America Patent
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Apr 25, 1995
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N/A
app pub date -
Jun 25, 1991
filing date -
Jun 27, 1989
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Abstract
This invention relates to a method for controlling the weight ratio of diethylenetriamine to piperazine in a process in which ethylenediamine, or a mixture of ethylenediamine and monoethanolamine, and hydrogen are maintained in the presence of a hydrogenation catalyst, which method comprises adjusting the hydrogen concentration in the liquid phase in an amount sufficient to effectuate control of the weight ratio of diethylenetriamine to piperazine in said process.
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