Process for the preparation of polycarbonates

Details Process for the preparation of polycarbonates Process for the preparation of polycarbonates

1993-02-22

1994-08-09

Foelak, Morton

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

526 67, 526 68, 528198, 528200, 528502, C08G 6424

Patent

active

053367502

ABSTRACT:
A process for the preparation of a polycarbonate comprising reacting a diaryl carbonate with a bisphenol to produce a polycarbonate and a phenol, regenerating the diaryl carbonate by reacting the phenol byproduct with a carbonyl halide, and optionally recycling the hydrogen halide using a metal Redox captive halogen swing reactor system.

REFERENCES:
patent: 4182726 (1980-01-01), Illuminati et al.
patent: 4452968 (1984-06-01), Bolon et al.
patent: 5189139 (1993-02-01), Tuinstra et al.

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