Catalyst system for polycarbonate manufacture

Details Catalyst system for polycarbonate manufacture Catalyst system for polycarbonate manufacture

1996-02-08

1998-04-28

Wood, Elizabeth D.

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Organic compound containing

502150, 502162, 502164, B01J 3100

Patent

active

057444161

ABSTRACT:
A method is provided for making polycarbonates utilizing an effective amount of a binary phase transfer catalyst, such as tetrabutylammonium bromide and a methyl tertiary amine as a condensation catalyst during the interfacial phosgenation of a bisphenol, such as bisphenol A. Improved phosgene utilization is achieved.

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