Aromatic carbonates
AssigneeGeneral Electric Company
InventorAlan J. Chalk
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Abstract
An aromatic carbonate process comprising contacting a phenol, carbon monoxide in the presence of a base, Group VIIIB element selected from ruthenium, rhodium, palladium, osmium, iridium or platinum having an oxidation state greater than zero. The resulting aromatic mono- and polycarbonates are useful in the preparation of polycarbonates or as polycarbonates, per se, respectively, which can be molded or formed into films, sheets, fibers, laminates or reinforced plastics by conventional techniques.
Claims22
An aromatic carbonate process which comprises contacting a phenol with carbon monoxide, a base, and a Group VIIIB element selcted from ruthenium, rhodium, palladium, osmium, iridium or platinum having an oxidation state greater than zero.
An aromatic polycarbonate process which comprises contacting an aromatic polyphenol with carbon monoxide in the presence of a base and a Group VIIIB metal selected from the class consisting of ruthenium, rhodium, palladium, osmium, iridium and platinum having an oxidation state greater than zero.
An aromatic polycarbonate process which comprises contacting an aromatic bisphenol of the formula:
- ##STR12## where independently each R.sup.1 and R.sup.2 is hydrogen, C.sub.1-4 alkyl or phenyl and independently each R.sup.3 and R.sup.4 is hydrogen or C.sub.1-4 alkyl, with carbon monoxide in the presence of a base and a Group VIIIB metal selected from the class consisting of ruthenium, rhodium, palladium, osmium, iridium and platinum having an oxidation state greater than zero.
An aromatic polycarbonate process which comprises contacting an aromatic bisphenol of the formula:
- ##STR13## with carbon monoxide in the presence of a base and a Group VIIIB metal selected from the class consisting of ruthenium, rhodium, palladium, osmium, iridium and platinum having an oxidation state greater than zero.
An aromatic monocarbonate process which comprises contacting an aromatic phenol of the formula:
- R.sub.a --OH).sub.x
- wherein R.sub.a represents an aromatic radical wherein the --OH radical is attached directly to an aromatic ring carbon atom and x is the number 1, with carbon monoxide, a base, and a Group VIIIB element selected from the class consisting of ruthenium, rhodium, palladium, osmium, iridium and platinum having an oxidation state greater than zero.
An aromatic monocarbonate process which comprises contacting a phenol of the formula:
- ##STR14## with carbon monoxide, a base, and a Group VIIIB element selected from the class consisting of ruthenium, rhodium, palladium, osmium, iridium and platinum having an oxidation state greater than zero.
Dependencies are inferred from the claim text.