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PROCESS FOR RECOVERY OF ARYL SUBSTITUTED BIPHENYL DIAMINES

IP.com Disclosure Number: IPCOM000026435D
Original Publication Date: 1991-Dec-31
Included in the Prior Art Database: 2004-Apr-05

Publishing Venue

Xerox Disclosure Journal

Abstract

A process for the recovery of N,N'-diphenyl-N, N'-bis( alkylpheny1)-1 , 1- biphenyl-4,4'-diamine from used multilayered photoreceptors is disclosed. The recovery process is comprised of the steps o f immersing the photoreceptor drum or belt in a liquid medium containing a dissolved amine or ammonia to depolymerize a polymeric binder resin, for example, polycarbonate; dissolving the fragmented polycarbonate into the liquid medium effecting spontaneous precipitation of the biphenyl diamines; and separating by filtration and drying the biphenyl diamines.