The catalytic system for the cyclic ketals synthesis based on glycerol and lower carbonyl compounds - high-biological additives to motor fuel

Cyclic ketals formed as a result of condensation of polyols from renewable sources (glycerol, monosaccharides, etc.) with carbonyl compounds can be used as high-octane and stabilizing additives to ethanol-containing motor fuels. By the example of glycerolacetone condensation with solketal formation, the screening of homogeneous and heterogeneous acid catalysts is carried out including sulphocationite obtained from cross-linked polystyrene with magnetosensitive particles. A high ketal yield (up to 90 %) is reached in catalytic systems capable of proton donation and water fixation. A ketal production scheme is developed, and a pilot facility is built based on the scheme.

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