Catalytic aliphatic carbonate process
AssigneeGeneral Electric Company
InventorJohn E. Hallgren
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Abstract
A catalytic aliphatic carbonate process which comprises contacting an alcohol, carbon monoxide, a Bronsted base, a Group VIIIB element selected from ruthenium, rhodium, palladium, osmium, iridium or platinum, oxygen and a redox co-catalyst. The resulting monocarbonates are useful in the preparation of polycarbonates via transesterification techniques.
Claims9
A catalytic aliphatic carbonate process for the preparation of carbonates having the general formula:
- ##STR3## wherein R is a hydrocarbon radical selected from the class consisting of alkyl or cycloalkyl radicals, which comprises reacting under substantially anhydrous reaction conditions, an alcohol of the formula ROH in which R is as defined hereinbefore, carbon monoxide, a Bronsted base, Group VIIIB catalyst selected from ruthenium, rhodium, palladium, osmium, iridium or platinum, oxygen and a redox co-catalyst which catalyses the oxidation of the Group VIIIB catalyst in the presence of oxygen subject to the proviso that the process is carried out while introducing concurrently both carbon monoxide and oxygen to the alcohol, Bronsted base, Group VIIIB catalyst and redox co-reactants.
A catalytic aliphatic carbonate process carried out under substantially anhydrous reaction conditions and in the substantial absence of undesirable byproducts consisting essentially of reacting an alcohol, carbon monoxide, a Bronsted base, a Group VIIIB catalyst selected from ruthenium, rhodium, palladium, osmium, iridium or platinum, oxygen and a redox co-catalyst which catalyses the oxidation of the Group VIIIB catalyst in the presence of oxygen, subject to the proviso that the process is carried out while introducing concurrently both carbon monoxide and oxygen to the alcohol, Bronsted base, Group VIIIB catalyst and redox co-reactants.
Dependencies are inferred from the claim text.