Cleaning and liquid contact with solids – Processes – Including application of electrical radiant or wave energy...
Patent
1992-11-23
1994-04-26
Breneman, R. Bruce
Cleaning and liquid contact with solids
Processes
Including application of electrical radiant or wave energy...
134 2, 134 29, 134 33, 134 38, B08B 312
Patent
active
053063490
ABSTRACT:
A method for removing the lacquer and aluminum coatings from the polycarbonate substrate of scrap compact discs so as to reclaim the polycarbonate includes the steps of immersing the discs in a an alkaline solution, heating the solution to a predetermined temperature and mechanically agitating the immersed discs by applying ultrasonic energy to the solution at a sufficient energy density and for a sufficient time to dissolve the lacquer and the aluminum into the solution. The solution containing the dissolved lacquer and aluminum is decanted from the stripped polycarbonate discs, the discs are washed with water to remove remanent alkaline solution, and then dried.
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Breneman R. Bruce
Chaudhry Saeed T.
Sony Music Entertainment Inc.
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