Catalytic aromatic carbonate process
AssigneeGeneral Electric Company
InventorAlan J. Chalk
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Abstract
Catalytic aromatic carbonate process which comprises contacting a phenol, carbon monoxide, an oxidant, a base, and a Group VIIIB element selected from ruthenium, rhodium, palladium, osmium, iridium or platinum. The resulting aromatic mono- and polycarbonates are useful in the preparation of polycarbonates or as polycarbonates, per se, respectfully, 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, carbon monoxide, a base, the Group VIIIB element selected from ruthenium, rhodium, palladium, osmium, iridium or platinum, and an oxidant having an oxidation potential greater than that of the said selected Group VIIIB element.
An aromatic polycarbonate process which comprises contacting an aromatic polyphenol with carbon monoxide, a base, the Group VIIIB element selected from the class consisting of ruthenium, rhodium, palladium, osmium, iridium and platinum, and an oxidant having an oxidation potential greater than that of the said selected Group VIIIB element.
An aromatic polycarbonate process which comprises contacting an aromatic bisphenol of the formula:
- ##STR21## 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, the Group VIIIB element selected from the class consisting of ruthenium, rhodium, palladium osmium, iridium and platinum and an oxidant having an oxidation potential greater than that of the said selected Group VIIIB element.
An aromatic polycarbonate process which comprises contacting an aromatic bisphenol of the formula:
- ##STR22## with carbon monoxide, a base, the Group VIIIB metal selected from the class consisting of ruthenium, rhodium, palladium, osmium, iridium and platinum, and an oxidant having an oxidation potential greater than that of the said selected Group VIIIB element.
An aromatic monocarbonate process which comprises contacting an aromatic phenol of the formula:
- R.sub.a --0H).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, the Group VIIIB element selected from the class consisting of ruthenium, rhodium, palladium, osmium, iridium and platinum, and an oxidant having an oxidation potential greater than that of the said selected Group VIIIB element.
An aromatic monocarbonate process which comprises contacting phenol with carbon monoxide, a base, a Group VIIIB element selected from the class consisting of ruthenium, rhodium, palladium, osmium, iridium and platinum, and an oxidant having an oxidation potential greater than that of the said selected Group VIIIB element.
Dependencies are inferred from the claim text.