PROCESS FOR RECOVERY OF ARYL SUBSTITUTED BIPHENYL DIAMINES
Original Publication Date: 1991-Dec-31
Included in the Prior Art Database: 2004-Apr-05
Xerox Disclosure Journal
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.