Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Process of treating scrap or waste product containing solid...
Patent
1991-09-17
1992-09-29
Morgan, Kriellion S.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Process of treating scrap or waste product containing solid...
521 40, 521 405, C08J 1104
Patent
active
051514524
ABSTRACT:
A process is disclosed for the purification of lacquer-and optionally dye and metal- containing waste of thermoplastic aromatic polycarbonates and/or thermoplastic aromatic polyester carbonates. The waste which result upon the production of moldings, such as audio compact discs, lenses for spectacles or head-lamp reflectors is processed in accordance with the invention to yield useful resin suitable for reprocessing as a molding resin. In accordance with the process, the waste is first size-reduced and then heated with acid to the reflux temperature while stirring. After a water wash there is followed a drying step. In accordance with the process, in instances where the waste does not originally contain metal, the metal in powder form is added before the acid treatment.
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Chemical Abstracts, No. 212203J, vol. 94, No. 26.
Chemical Abstracts, No. 180875B, vol. 112, No. 20.
Ehlert Manfred
Fennhoff Gerhard
Freitag Dieter
Jakob Wolfgang
Asinovsky Olga
Bayer Aktiengesellschaft
Gil Joseph C.
Morgan Kriellion S.
Pries Aron
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