Method for producing ethyleneamines from untreated AAN

Details Method for producing ethyleneamines from untreated AAN Method for producing ethyleneamines from untreated AAN

2011-06-14

2011-06-14

Davis, Brian J (Department: 1621)

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

Organic compounds

Amino nitrogen containing

C564S491000

Reexamination Certificate

active

07960590

ABSTRACT:
The invention relates to a process for preparing an ethylene amine mixture, which comprises the following steps:a) crude AAN which is largely free of formaldehyde cyanohydrin (largely FACH-free) is heated at a temperature of from 50 to 150° C. to give an amino nitrile mixture comprising aminoacetonitrile (AAN) and from 5 to 70% by weight of iminodiacetonitrile (DAN),b) hydrogenation of the amino nitrile mixture obtained in step a) in the presence of a catalyst.Ethylenediamine (EDA) and/or diethylenetriamine (DETA) and also, if appropriate, further ethylene amines can be isolated from the ethylene amine mixtures obtained.

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