Process and apparatus for the purification of commercially avail

Details Process and apparatus for the purification of commercially avail Process and apparatus for the purification of commercially avail

1996-12-20

1998-06-09

Raymond, Richard L.

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

Organic compounds

Amino nitrogen containing

564437, C07C20984

Patent

active

057636664

ABSTRACT:
A process for the purification of crude N,N'-diphenyl-p-phenylenediamine (DPPD), which comprises extracting crude DPPD with a hydrocarbon or hydrocarbon mixtures thereby forming an extract solution containing DPPD, passing the extract solution over an adsorption layer, and recovering purified DPPD from the solution.

REFERENCES:
Chemical Abstracts, vol. 89, No. 3, Jul. 17, 1978, AN-23925, S. I. Burmistrov, et al., "Purification Of N,N'-Dephenyl-P-Phenylenediamine", and SU 595 295, Mar. 20, 1978.
Beilstein 13, IV, p. 116 (1973).

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