Vapor phase condensation of ethyl lactate into lactide over SnO2/SiO2 catalyst
DOI:
https://doi.org/10.15407/dopovidi2018.01.073Keywords:
ethyl lactate, lactide, supported catalyst, tin dioxide, vapor phase conversionAbstract
The vapor phase conversion of 20 % solutions of ethyl lactate in cyclohexane into lactide over various oxides with the supported phase of SnO2 is investigated in the continuous regime at 200—260 °C. It was found that SnO2/SiO2 catalyst provides 40 % conversion of ethyl lactate with 44 % selectivity toward lactide at 250 °C. A scheme of lactide formation from ethyl lactate with the participation of L-acid sites of the SnO2 surface is discussed.
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