Organic compounds -- part of the class 532-570 series – Organic compounds – Carbonate esters
Patent
1994-01-03
1994-09-20
Kight, III, John
Organic compounds -- part of the class 532-570 series
Organic compounds
Carbonate esters
528371, 558270, 558277, 562891, C07C 6996, C08G 6438
Patent
active
053491025
ABSTRACT:
A process for the preparation of an aromatic carbonate or polycarbonate from a phenol or bisphenol, methanol, carbon monoxide and oxygen comprising the steps of 1) reacting phenol or bisphenol with acetic anhydride to form (bis)phenyl acetate; 2) reacting dimethyl carbonate with (bis)phenyl acetate from step 1 to produce a phenyl carbonate or polycarbonate and methyl acetate; and 3) reacting the methyl acetate with carbon monoxide to produce acetic anhydride for use in step 1. In a desirable embodiment the dimethyl carbonate may also be prepared by reaction of methanol, carbon monoxide and oxygen.
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Rand Cynthia L.
Tuinstra Hendrik
Kight III John
Mosley Terressa
The Dow Chemical Company
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