Process for cleaving polycarbonates into bisphenols and diaryl c

Details Process for cleaving polycarbonates into bisphenols and diaryl c Process for cleaving polycarbonates into bisphenols and diaryl c

1993-06-14

1995-02-21

Dees, Jose G.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carbonate esters

558266, 558267, 558268, 558269, 558277, C07C 6996

Patent

active

053918029

ABSTRACT:
A process is disclosed for cleaving polycarbonates into bisphenols and diaryl carbonates by transesterifying with phenols in the presence of catalysts. The process entails isolating bisphenols from the product of the transesterification, and subjecting the remaining mixture which contains phenols and diaryl carbonates to flash distillation. The phenols and diaryl carbonates are distilled off and separated, and the diaryl carbonates are recovered.

REFERENCES:
patent: 5266716 (1993-11-01), Buysch et al.

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