Purification of (hydrocarbylthio) aromatic amines

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

1986-07-10

1988-02-23

Sutto, Anton H.

Organic compounds -- part of the class 532-570 series

Organic compounds

Amino nitrogen containing

564430, 564440, 546293, 548484, 548541, 568 38, 568 57, C07C 8526

Patent

active

047271914

ABSTRACT:
A (hydrocarbylthio)aromatic amine, such as a methylthiosubstituted toluenediamine, is separated from corresponding aromatic amines containing fewer hydrocarbylthio 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.

REFERENCES:
patent: 3228989 (1966-01-01), Reifschneider
patent: 3763239 (1973-10-01), Smolin
patent: 3931321 (1976-01-01), Planker et al.
patent: 4594453 (1986-06-01), Ranken et al.

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