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The reaction kinetics of the liquid-phase synthesis of ethyl lactate from dihydroxyacetone and ethanol was studied on Sn-promoted alumina catalysts. Yields of ≈70% were obtained at 353K after 7h of reaction. The effect of the catalyst Sn loading (1–8wt.%) and reaction temperature (343–373K) on the reaction kinetics was investigated. The reaction is promoted by Lewis acid sites provided by surface...
Sn-promoted alumina catalysts with different Sn loadings (1–8wt.%) were prepared by impregnation and characterized by N2 physisorption, X-ray diffraction, UV–vis-DRS, FTIR of pyridine and TPD of NH3. Surface Sn species present Lewis acid properties different from those of the alumina support; the number and strength of the surface Lewis centers increase with the Sn loading. These materials exhibit...
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