Shen Zheng, Gao Yishan, Kong Ling, Gu Minyan, Xia Meng, Dong Wenjie, Zhang Wei, Zhou Xuefei, Zhang Yalei
State Key Laboratory of Pollution Control and Resources Reuse, Key Laboratory of Yangtze River Water Environment of MOE, National Engineering Research Center of Protected Agriculture, Shanghai Engineering Research Center of Protected Agriculture, Tongji University, Shanghai 200092, China.
ACS Omega. 2020 Dec 29;6(1):284-293. doi: 10.1021/acsomega.0c04561. eCollection 2021 Jan 12.
Amine-modified Sn-β was synthesized to improve the yield of lactic acid produced from . After studying the growth of , we selected with the highest sugar content of 46.7% after 8 days of culture as the reaction substrate. The results showed that the yield of lactic acid from was greatly increased after being catalyzed by 3-aminopropyltrimethoxysilane (APTMS)-modified Sn-β. After the pretreatment of in an ice bath ultrasound, under the optimal reaction conditions (190 °C and 5 h), the yield of lactic acid reached the highest (37%). The acid-base characterization results of the catalyst confirmed that there are both Lewis acidic sites and medium-strength basic sites in the catalyst. Both of these sites can promote the hydrolysis of , while the Lewis acidic sites can promote the production of lactic acid and the basic sites can effectively inhibit the production of the byproduct 5-hydroxymethylfurfural (HMF). This study proved that this amination catalyst is a useful strategy to increase the yield of lactic acid.
合成了胺改性的Sn-β以提高由……产生的乳酸产量。在研究了……的生长后，我们选择培养8天后糖含量最高达46.7%的……作为反应底物。结果表明，经3-氨丙基三甲氧基硅烷（APTMS）改性的Sn-β催化后，由……产生的乳酸产量大幅提高。在冰浴超声预处理……后，在最佳反应条件（190℃和5小时）下，乳酸产量达到最高（37%）。催化剂的酸碱表征结果证实，催化剂中同时存在路易斯酸性位点和中等强度碱性位点。这两种位点都能促进……的水解，而路易斯酸性位点能促进乳酸的生成，碱性位点能有效抑制副产物5-羟甲基糠醛（HMF）的生成。本研究证明这种胺化催化剂是提高乳酸产量的有效策略。
