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Method for preparing diaryl carbonates employing hexaalkylguanidinium halides
Method for preparing diaryl carbonates employing hexaalkylguanidinium halides
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机译:用六烷基胍卤化物制备碳酸二芳基酯的方法
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摘要
Hydroxyaromatic compounds such as phenol are converted to diaryl carbonates by reaction with oxygen and carbon monoxide in the presence of a catalyst package which typically comprises a group VIIIB metal or compound thereof, an inorganic cocatalyst, an organic cocatalyst and a hexaalkylguanidinium bromide or chloride, preferably bromide. The use of the hexaalkylguanidinium salt causes an increase in the yield of diaryl carbonate without a decrease in selectivity.
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