Purification of (hydrocarbylthio) aromatic amines

Details Purification of (hydrocarbylthio) aromatic amines Purification of (hydrocarbylthio) aromatic amines

C - Chemistry, Metallurgy

07

C

260/612.2

C07C 323/00 (2006.01) C07C 319/28 (2006.01)

Patent

CA 1270263

ABSTRACT PURIFICATION OF (HYDROCARBYLTHIO) AROMATIC AMINES A (hydrocarbylthio)aromatic amine, such as a methylthio-substituted toluenediamine, is separated from corresponding aromatic amines containing fewer hydro- carbylthio groups by washing an organic solution of the amine mixture with a dilute aqueous acid having a pKa value below 7 to extract at least a portion of the corresponding aromatic amines.

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