Process for preparing nitrilotriacetonitrile

Details Process for preparing nitrilotriacetonitrile Process for preparing nitrilotriacetonitrile

1971-11-03

1976-10-05

Brust, Joseph Paul

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C12000, C07C12143

Patent

active

039844536

ABSTRACT:
The preparation of methylene-bis-iminodiacetonitrile and nitrilotriacetonitrile by the reaction of formaldehyde, ammonia and hydrogen cyanide under acidic conditions involving a particular procedure of adding hydrogen cyanide to an acidified liquid phase adduct of ammonia and formaldehyde; the preparation of nitrilotriacetonitrile from methylene-bis-iminodiacetonitrile; and the preparation of nitrilotriacetic acid from methylene-bis-iminodiacetonitrile by carboxymethylation under alkaline conditions. Nitrilotriacetonitrile is particularly useful in the formation, by hydrolysis, of nitrilotriacetic acid of particular value as a chelating or complexing agent.

REFERENCES:
patent: 2855428 (1958-10-01), Singer et al.
patent: 3061628 (1962-10-01), Singer et al.
patent: 3679728 (1972-07-01), Morgan et al.
patent: 3679729 (1972-07-01), Daniels

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