Method for producing polycarbonate

Details Method for producing polycarbonate Method for producing polycarbonate

2006-06-27

2006-06-27

Boykin, Terressa (Department: 1711)

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

C159S006100, C159S006200, C422S131000, C526S126000, C526S161000, C528S198000, C585S521000

Reexamination Certificate

active

07067610

ABSTRACT:
An integrated method for producing aromatic polycarbonate, including the steps of:(1) making a liquid mixture of acetone and diphenylcarbonate;(2) transporting the liquid mixture of step (1) to a polycarbonate production plant;(3) separating the diphenylcarbonate from the acetone in the liquid mixture in the polycarbonate production plant;(4) reacting the diphenylcarbonate with bisphenolacetone to produce polycarbonate, thereby liberating phenol;(5) reacting phenol of step (4) with acetone of step (3) to produce bisphenolacetone;(6) using bisphenolacetone of step (5) in the reaction of step (4).

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