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US 4,234,730 AGranted
Process of preparing selective mixtures of piperazine and ethylenediamine
AssigneeTexaco Development Corporation
InventorsThomas T. McConnell, Thomas H. Cour
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Abstract
Covers a process for preparing a mixture of piperazine and ethylenediamine by the hydrogenation reaction of monoethanolamine and ammonia utilizing a nickel-copper-chromium catalyst. The improvement of the invention involves predetermining the ratio of ethylenediamine to piperazine in the product mix by varying the hydrogen feed rate. Increasing said feed rate causes said ratio to decrease.
Claims3
In a process of preparing a mixture of piperazine and ethylenediamine by reacting monoethanolamine and ammonia in presence of hydrogen and a nickel-copper-chromium catalyst;
- the improvement which comprises adjusting the ratio of ethylenediamine to piperazine in said product mixture by varying the hydrogen feed rate such that by increasing said feed rate said ratio is decreased.
Dependencies are inferred from the claim text.