ZSM-5纳米片催化乳酸一步合成丙交酯  

ZSM-5 Nanosheets Catalyzed One-Step Synthesis of Lactide from Lactic Acid

作　　者：刘召霞 吴迪 孙杰 席志祥 徐人威 姜涛 LIU Zhaoxia;WU Di;SUN Jie;XI Zhixiang;XU Renwei;JIANG Tao(College of Chemical Engineering and Materials Science,Tianjin University of Science and Technology,Tianjin 300457,China;PetroChina Lanzhou Petrochemical Company,Lanzhou 730600,China;Zhonghua Quanzhou Energy Technology Co.,Ltd.,Quanzhou 362000,China)

机构地区：[1]天津科技大学化工与材料学院,天津300457 [2]中国石油兰州石化公司,兰州730600 [3]中化泉州能源科技有限责任公司,泉州362000

出　　处：《天津科技大学学报》2025年第1期28-34,共7页Journal of Tianjin University of Science & Technology

基　　金：国家自然科学基金项目(22071178)。

摘　　要：乳酸一步法合成丙交酯是一种节能高效的丙交酯制备方式。本研究合成了不同硅铝比的纳米片状ZSM-5分子筛,并探究其对乳酸一步合成丙交酯的催化效果。结果表明:以L–乳酸水溶液为原料,以硅铝比为40的纳米片状ZSM-5分子筛为催化剂,反应2 h后丙交酯产率达91%以上。相比其他分子筛催化剂,该纳米片状ZSM-5分子筛在催化乳酸一步合成丙交酯反应中具有显著优势。ZSM-5纳米片分子筛中丰富的介孔及其特有的短b轴结构,可有效降低乳酸及其低聚物在微孔中的扩散阻力,减少乳酸低聚物等副产物的生成。The one-step synthesis of lactide from lactic acid is an energy-saving and efficient method for preparing lactide.In our current research we studied the catalytic effect of ZSM-5 nanosheets with different Si/Al ratios on the one-step synthe-sis of lactide from lactic acid.The results showed that using L-lactic acid aqueous solution as raw material and ZSM-5 nanosheets with Si/Al ratio of 40 as catalyst,the yield of lactide reached over 91%after two hours of reaction.Compared with other molecular sieve catalysts,ZSM-5 nanosheets had significant advantages in catalyzing the one-step synthesis of lactide from lactic acid.The rich mesoporous and unique short b-axis structure in ZSM-5 nanosheets can effectively decrease the diffusion resistance of lactic acid and its oligomers in micropores,which can reduce the generation of by-products such as lactic acid oligomers.

关 键 词：聚乳酸 丙交酯 ZSM-5纳米片 

分 类 号：TQ426[化学工程]