Process for separating off aminobiphenyl from diphenylamine

Details Process for separating off aminobiphenyl from diphenylamine Process for separating off aminobiphenyl from diphenylamine

1995-09-11

1997-02-11

Raymond, Richard L.

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

Organic compounds

Amino nitrogen containing

564307, 564435, 564437, C07C20986

Patent

active

056022840

ABSTRACT:
Aminobiphenyl (ABP) can be separated off from diphenylamine (DPA) by treating the DPA to be purified at elevated temperature with a substance in which oxygen is bonded by a double bond to a C atom, an N atom or another O atom and then separating off the DPA from the treated mixture.

REFERENCES:
patent: 2256196 (1941-09-01), Filbert
patent: 3849495 (1974-11-01), Bromby
patent: 5107024 (1992-04-01), Kool et al.
patent: 5481037 (1996-01-01), Fuchs et al.

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