Process for removal and recovery of an arylamine compound

US6096927A · kind A · utility

Assignee

• Xerox Corporation · US

Inventors

• Satish Parikh · Rochester, US
• Edward J. Radigan, Jr. · Hamlin, US
• Anthony M. Horgan · Pittsford, US
• John A. Bergfjord, Sr. · Macedon, US

Key dates

• Filing date: Aug 2, 1999
• Grant date: Aug 1, 2000
• Expiry date: Aug 2, 2019

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C209/86
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for recovery of N,N'-bis(alkylphenyl)-[1,1'-biphenyl]-4,4'-diamine from an electrophotographic imaging member, the process including PA1 providing an electrophotographic imaging member including at least one imaging layer, the imaging layer including a film forming binder and N,N'-bis(alkylphenyl)[1,1'-biphenyl]-4,4'-diamine, PA1 contacting the at least one imaging layer with warm toluene to dissolve toluene soluble materials including the film forming binder and N,N'-bis(alkylphenyl)-[1,1'-biphenyl]-4,4'-diamine to form a mixture containing undissolved material and a solution of toluene and the toluene soluble materials, PA1 isolating the solution from the undissolved material, PA1 concentrating the solution in a partial vacuum and with applied heat, PA1 cooling the concentrate, PA1 mixing the concentrate with acetone to precipitate the N,N'-bis(alkylphenyl)-[1,1'-biphenyl]-4,4'-diamine, PA1 separating the N,N'-bis(alkylphenyl)-[1,1'-biphenyl]-4,4'-diamine precipitate from the concentrate, PA1 washing the N,N'-bis(alkylphenyl)-[1,1'-biphenyl]-4,4'-diamine precipitate with acetone, PA1 drying the N,N'-bis(alkylphenyl)-[1,1'-biphenyl]-4,4'-diamine precipitate, PA1 and puri…