Catalytic aromatic carbonate process
AssigneeGeneral Electric Company
InventorJohn E. Hallgren
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Abstract
An improved catalytic aromatic carbonate process which comprises contacting under substantially anhydrous reaction conditions a phenol, carbon monoxide, an oxidant, a base, and the Group VIIIB element selected from ruthenium, rhodium, palladium, osmium, iridium or platinum. The resulting aromatic mono- and poly-carbonates 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.
Claims56
An aromatic carbonate process which comprises contacting under substantially anhydrous reaction conditions, a phenol, carbon monoxide, a base, a 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 under substantially anhydrous reaction conditions an aromatic polyphenol 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.
An aromatic polycarbonate process which comprises contacting under substantially anhydrous reaction conditions 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, 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.
An aromatic polycarbonate process which comprises contacting under substantially anhydrous reaction conditions on aromatic bisphenol of the formula:
- ##STR22## with carbon monoxide, a base, a 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 under substantially anhydrous reaction conditions 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, 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.
An aromatic monocarbonate process which comprises contacting under substantially anhydrous reaction conditions a 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.
The chain 46 process further comprising a molecular sieve.
Dependencies are inferred from the claim text.