The study is directed to the search of a simple effective catalyst for ethyl lactate obtained from fructose as renewable raw material. A series of SnO2-containing oxides prepared by impregnation of alumina were characterized by several techniques in order to determine their textural and acid-base properties. The transformation of a 13% fructose solution in 98% ethanol over SnO2/Al2O3 catalysts using autoclave rotated with 60 rpm at 160 °C for 3 h was studied. It was found that doping SnO2/Al2O3 samples with ZnO improves selectivity towards ethyl lactate. The supported SnO2-ZnO/Al2O3 catalyst provides 100% fructose conversion with 55% yield of ethyl lactate at 160 °C. A possible scheme of fructose transformation into ethyl lactate on L-acid IVSn4+ sites is discussed.
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机译：该研究涉及从果糖作为可再生原料获得的乙基乳酸乙酯的简单有效催化剂的搜索。通过浸渍氧化铝制备的一系列含SnO2氧化物的特征在于几种技术，以确定其纹理和酸碱性质。使用高压釜在160℃下旋转60rpm的高压釜中的98％乙醇中果糖溶液的转化为160℃，CO 3小时。发现用ZnO掺杂SnO 2 / Al2O3样品改善了对乳酸乙酯的选择性。支持的SnO 2-ZnO / Al 2 O 3催化剂在160℃下提供100％的果糖转化率，55％的乳酸盐; C。讨论了L-酸IVSN4 +位点上乳液中的果糖转化的可能方案。
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