コバルト・リン触媒による1, 2-エポキシ直鎖アルカンの接触水素化分解

概要

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Liquid phase catalytic hydrogenolysis of straight-chain 1, 2-epoxyalkanes to primary alcohols was studied over cobalt-phosphorus catalyst under 40 kg/cm2 of initial hydrogen pressure and 100190°C. Two types of catalysts, supported on alumina (Co-P-Al2O3) and unsupported (Co-P), were prepared by the reduction of cobaltous phosphate with hydrogen at an elevated temperature. Optimal temperature for the reduction was 650°C. 1, 2-Epoxyoctane was hydrogenolyzed in n-hexane with Co-P-Al2O3 to mainly octanols accompanied with n-octane and a small amount of 2-octanone. The selectivity of 1-octanol in octanols was about 93%. In the case of the catalytic hydrogenolysis of 1, 2-epoxyhexane in ethanol, the solvolysis to ethoxyhexanols, which occurred to the considerable extent over Co-P-Al2O3, was depressed over Co-P catalyst. It was shown that the alumina in the catalyst increased the solvolysis product.
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