Process for producing n,n-disubstituted aminophenol

Details Process for producing n,n-disubstituted aminophenol Process for producing n,n-disubstituted aminophenol

C - Chemistry, Metallurgy

07

C

C07C 215/76 (2006.01) C07C 213/02 (2006.01) C07C 213/08 (2006.01) C07C 213/10 (2006.01)

Patent

CA 2136102

A process for producing N,N-disubstituted aminophenol which comprises the steps of: obtaining a reaction mixture containing N-substituted aminophenol by reacting a dihydric phenol and an amine; subjecting said reaction mixture to heat treatment so as to thermally decompose quaternary ammonia salt contained in said reaction mixture into a dihydric phenol and an amine, and removing at least said amine by distillation; separating high-boiling impurities by distillation to separate N-substituted aminophenol; and subjecting said separated N-substituted aminophenol to reduction alkylation using an aldehyde compound. According to the present invention, high-purity N,N- disubstituted aminophenol can be obtained in a high yield at high selectivity, and a reduction catalyst can be used repeatedly because its activity can be maintained at a high level and yet it can retain high activity for a long period of time.

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