The influence of reaction temperature on CHE reaction over cobalt resinate at 7 h was investigated and shown in Fig. 1. It is seen that the conversion of CHE increased almost linearly with reaction temperature up to 333 K. The selectivity of 2-CHON also increased with increase in reaction temperature up to 333 K. A further increase in the reaction temperature resulted in the decrease in the con-version rate of CHE and the selectivity of 2-CHON, probably owing to the polymerization of CHE or 2-CHON at higher temperature. Whereas the selectivity of 2-CHOL decreased with the increase of reaction temperature up to 333 K, which is attributed to the further reaction of 2-CHOL to 2-CHON. Beyond 333 K, the selectivity of 2-CHOL increased with increase in reaction temperature. Considering the effect of temperature on both conversion of CHE and the selectivity of 2-CHON, 333 K was chosen as the suitable temperature for the oxidation of CHE.

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