Process for the preparation of polycarbonates and diaryl...

Details Process for the preparation of polycarbonates and diaryl... Process for the preparation of polycarbonates and diaryl...

2011-01-04

2011-01-04

Boykin, Terressa M (Department: 1796)

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

C422S135000, C528S198000

Reexamination Certificate

active

07863403

ABSTRACT:
The present invention relates to a process for the continuous preparation of polycarbonates or diaryl carbonates by the method of the phase boundary process, in which both the mixing of the organic and aqueous phase and the upstream oligomerization step or aryl chloroformate and/or diaryl carbonate preparation step are effected in a special pump.

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