CAS Key Laboratory of Low-Carbon Conversion Science and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201210, P.R. China.
Department of Chemistry, Shanghai University, Shanghai, 200444, P.R. China.
ChemSusChem. 2018 Aug 9;11(15):2492-2496. doi: 10.1002/cssc.201801087. Epub 2018 Jul 5.
Formic acid-induced controlled-release hydrolysis of sugar-rich microalgae (Scenedesmus) over the Sn-Beta catalyst was found to be a highly efficient process for producing lactic acid as a platform chemical. One-pot reaction with a very high lactic acid yield of 83.0 % was realized in a batch reactor using water as the solvent. Under the attack of formic acid, the cell wall of Scenedesmus was disintegrated, and hydrolysis of the starch inside the cell was strengthened in a controlled-release mode, resulting in a stable and relatively low glucose concentration. Subsequently, the Sn-Beta catalyst was employed for the efficient conversion of glucose into lactic acid with stable catalytic performance through isomerization, retro-aldol and de-/rehydration reactions. Thus, the hydrolysis of polysaccharides and the catalytic conversion of the monosaccharide into lactic acid was realized by the combination of an organic Brønsted acid and a heterogeneous Lewis acid catalyst.
富马酸诱导富含糖的微藻（栅藻）在 Sn-Beta 催化剂上的可控水解被发现是一种生产乳酸作为平台化学品的高效方法。一锅法反应在间歇式反应器中以水为溶剂，实现了非常高的乳酸收率 83.0%。在甲酸的攻击下，栅藻的细胞壁被破坏，细胞内的淀粉水解以可控释放的方式得到加强，从而产生稳定且相对较低的葡萄糖浓度。随后，Sn-Beta 催化剂通过异构化、逆醛缩合和脱/再水合反应将葡萄糖高效转化为乳酸，表现出稳定的催化性能。因此，通过有机 Brønsted 酸和多相 Lewis 酸催化剂的结合，实现了多糖的水解和单糖的催化转化为乳酸。
