酸性树脂催化合成苹果酯的新工艺研究

Synthesis of fructone using acidic resin as a catalyst

以酸性树脂为催化剂，由乙酰乙酸乙酯与乙二醇合成苹果酯，研究了催化剂用量、原料配比和反应时间对酯化反应的影响．结果表明：当原料配比为１∶１．２５，催化剂用量为３％，反应时间４ｈ时，产物收率可达９５．５％，催化剂经１０次重复使用后其性能仍保持稳定．

Fructone has been synthesized by the esterification of ethyl acetoacetate with ethylene glycol, using acidic resin R—SO3H as a catalyst. The effects of amount of the acidic resin, reaction time and molar ratio of ethyl acetoacetate to glycol alcohol on the esterification have been studied. The experimental results show that the amount of the catalyst is 3%, the reaction time 4h, and the yield of the product 95.5%. The catalyst can be still used after ten times.