Diphenylamine purification

Details Diphenylamine purification Diphenylamine purification

1991-05-22

1992-04-21

Raymond, Richard L.

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

Organic compounds

Amino nitrogen containing

564437, C07C20984

Patent

active

051070243

ABSTRACT:
Selective removal of primary amines from technical grade diphenylamine by contacting a solvent solution of said diphenylamine with a cationic exchange resin having sulfonic acid group functionality in the presence of up to about 3 percent water.

REFERENCES:
patent: 2256196 (1941-09-01), Filbert
patent: 4667048 (1987-05-01), Inoue et al.
Majewski, T. et al., "Separation of Diphenylamine & Azobenzene," CA, vol. 69, No. 10192c (1968).
Velea, I. et al., "Purification of Diphenylamine," CA, vol. 78, No. 147537z (1973).

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