Process for producing imino diacetonitrile

Details Process for producing imino diacetonitrile Process for producing imino diacetonitrile

C - Chemistry, Metallurgy

07

C

260/561.2

C07C 121/20 (1980.01)

Patent

CA 1128067

ABSTRACT Production of Iminodiacetonitrile. The invention relates to a process for the production of iminodiacetonitrile by reacting hexamethylene tetramine with hydrogen cyanide in aqueous acid medium at a temperature of 30 to 90°C. In this process, the pH-value is progressively reduced by a total of 0.5 to 3.5 units during the reaction, beginning at pH 5.5 to 7.5, and free formaldehyde is only present in a limited quantity. In contrast to known processes, this suppresses the formation of secondary products and an iminodiacetonitrile sufficiently pure for further use is directly obtained in a very good yield.

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