Process for recovering n-methyliminodiacetic acid from...

Details Process for recovering n-methyliminodiacetic acid from... Process for recovering n-methyliminodiacetic acid from...

C - Chemistry, Metallurgy

07

C

C07C 229/24 (2006.01) C07C 227/18 (2006.01) C07C 227/40 (2006.01) C07C 227/42 (2006.01)

Patent

CA 2068396

ABSTRACT N-methyliminodiacetic acid is separated from mixtures of N- methyliminodiacetic acid and sodium sulfate formed by acidification of solutions of its disodium salt with sulfuric acid. Thus the disodium salt is acidified with sulfuric acid to a pH of about 2 and concentrated by evaporating water so as to crystallize sodium sulfate. The sodium sulfate is separated, and the resulting mother liquor is cooled to precipitate N-methyliminodiacetic acid, which is then separated.

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