Hydrolyzed nitrilotriacetonitrile compositions,...

Details Hydrolyzed nitrilotriacetonitrile compositions,... Hydrolyzed nitrilotriacetonitrile compositions,...

C - Chemistry, Metallurgy

07

C

C07C 231/06 (2006.01) C01C 3/00 (2006.01) C07C 229/16 (2006.01) C07C 233/05 (2006.01) C07C 237/06 (2006.01) C07C 255/25 (2006.01) C09K 8/528 (2006.01)

Patent

CA 2673367

Hydrolyzed nitrilotriacetonitrile compositions are disclosed prepared by a method characterized by a one-shot addition of an amount of nitrilotriacetonitrile to a solution containing an acid catalyst, where the reaction is complete in a time period of less than an hour. The method is also characterized by adjusting the pH of the reaction mixture to a pH of at least 8. The method is also characterized by oxidatively removing free cyanide to a desired low level through the addition of an oxidizing agent the produces environmentally benign by-products to the crude hydrolyzed NTAN to form hydrolyzed NTAN compositions having minimized, negligible, or substantially no free cyanide levels.

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