Production of triethylenediamine

Details Production of triethylenediamine Production of triethylenediamine

1985-08-19

1988-02-16

Berch, Mark L.

Organic compounds -- part of the class 532-570 series

Organic compounds

Nitrogen attached directly or indirectly to the purine ring...

544401, 544170, 544402, C07D48718, C07D29508, C07D29512

Patent

active

047256818

ABSTRACT:
An ethanolamine, preferably diethanolamine, is converted to triethylenediamine or 1,4-bis(2-hydroxyethyl)piperazine, or both by pyrolysis using a B-subgroup metal oxide such as titanium dioxide or zirconium dioxide, as catalyst. In addition it has also been discovered that 1,4-bis(2-hydroxyethyl)piperazine and N-(2-hydroxyethyl)piperazine can be converted in high yields and conversions into triethylenediamine by pyrolysis using the same type of catalyst. When using an ethanolamine as the feedstock and a Group IV-B metal oxide as the catalyst, the process usually results in the coproduction of triethylenediamine and 1,4-bis(2-hydroxyethyl)piperazine, and the latter can be recovered and used as a raw material for the production of additional triethylenediamine, as by recycle to the same reactor or as feedstock to an additional pyrolysis reactor.

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