Process for making N,N,N',N'-tetraacetylethylenediamine

Details Process for making N,N,N',N'-tetraacetylethylenediamine Process for making N,N,N',N'-tetraacetylethylenediamine

1980-12-08

1982-10-12

Doll, John

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

Organic compounds

Amino nitrogen containing

564133, C07C10200

Patent

active

043540422

ABSTRACT:
N,N,N',N'-tetraacetylethylenediamine (TAED) is made by an improved multicyclic process, which comprises, in each cycle, the steps of reacting N,N'-diacetylethylenediamine (DAED) with acetic anhydride and thereby forming a reaction mixture of N,N,N',N'-tetraacetylethylenediamine and acetic acid and anhydride, and distilling off acetic acid and working up the distillation residue to give substantially pure N,N,N',N'-tetraacetylethylenediamine, and in which the molar ratio of DAED:acetic anhydride in each cycle is at least 1:6.

REFERENCES:
patent: 3223732 (1965-12-01), Viveen et al.
patent: 3824286 (1974-07-01), Grimmelikhuysen et al.
patent: 3824287 (1974-07-01), Ludwigshafen et al.

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