APPARATUS FOR THE PURIFICATION OF COMMERCIALLY AVAILABLE DIPHENYL-P-PHENYLENEDIAMINE (DPPD)

APPARATUS FOR THE PURIFICATION OF COMMERCIALLY AVAILABLE DIPHENYL-P-PHENYLENEDIAMINE (DPPD)

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 f...

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Bibliographische Detailangaben
Hauptverfasser: Frings, Albert-Johannes, Horn, Michael, Jenker, Peter, Monkiewicz, Jaroslaw, Srebny, Hans-Guenther, Standke, Burkhard, Trautvetter, Bertram
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung: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.