Process for the purification of polycarbonate solutions

Details Process for the purification of polycarbonate solutions Process for the purification of polycarbonate solutions

1980-02-01

1982-02-16

Michl, Paul R.

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

Synthetic resins

Treating polymer containing material or treating a solid...

260 342, C08J 316

Patent

active

043160093

ABSTRACT:
Organic-solvent solutions of polycarbonates containing impurities, e.g., sodium chloride and sodium carbonate formed during the preparation of the polycarbonates, and/or catalysts, are purified by sending aqueous emulsions of polycarbonates in water-immiscible organic solvents, in particular the aqueous emulsions coming from the various purification phases of the organic polycarbonate solutions obtained in the synthesis, through a layer of fibers in which the dispersed droplets of the emulsion coalesce, with the formation of two layers each consisting essentially of one of the two separate phases of the emulsion.

REFERENCES:
patent: 3200105 (1965-08-01), Barber
patent: 3505273 (1970-04-01), Cleveland
patent: 3720645 (1973-03-01), Nistri
patent: 3939118 (1976-02-01), Horbach
patent: 3954713 (1976-05-01), Schnoring
patent: 4177343 (1979-12-01), Pannell

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