Utilization of bisphenol-A from the alkaline phase generated in

Details Utilization of bisphenol-A from the alkaline phase generated in Utilization of bisphenol-A from the alkaline phase generated in

1975-01-27

1977-05-24

Lieberman, Allan

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260463, C07C 6802, C07C 6996, C08G 6362

Patent

active

040254895

ABSTRACT:
This invention relates to polycarbonates and more particularly to recovering unreacted bisphenol-A from the alkaline phase generated in the production of polycarbonates, comprising reacting the alkaline phase with phosgene to convert the unreacted bisphenol-A to a low molecular weight polymer and returning a solvent solution of the low molecular weight polymer to the main reaction stream.

REFERENCES:
patent: 3028365 (1962-04-01), Schnell et al.
patent: 3046255 (1962-07-01), Strain et al.
patent: 3437639 (1969-04-01), Beach et al.
patent: 3646102 (1972-02-01), Kobayashi et al.
patent: 3787359 (1974-01-01), Horn et al.

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