银杏叶提取中NaA膜的渗透汽化与中药截留研究  

Pervaporation of NaA Zeolite Membrane in Extraction Pro⁃cess of Ginkgo Biloba Leaves and Its Separation Effect on Traditional Chinese Medicine

作　　者：李梦迪 范茏 王青[1,2] 刘峤[1] 丁爱琴 童惠娟[1] LI Mengdi;FAN Long;WANG Qing;LIU Qiao;DING Aiqin;TONG Huijuan(School of Energy,Materials and Chemical Engineering,Hefei University,Hefei 230601;State Key Laboratory of Materials-Oriented Chemical Engineering,Nanjing Tech University,Nanjing 211899,China)

机构地区：[1]合肥学院能源材料与化工学院,合肥230601 [2]南京工业大学材料化学工程国家重点实验室,南京211899

出　　处：《合肥学院学报（综合版）》2023年第2期60-66,73,共8页Journal of Hefei University：Comprehensive ED

基　　金：安徽省重点研究和开发计划项目“面向低碳流程再造的PVA混合基质膜制备关键技术与装备核心膜组件的研发”(2022a05020041);安徽省教育厅重点项目“面向CO_(2)高效分离超薄碳化硅膜的构筑与微结构调控机制研究”(KJ2021A1015);南京工业大学材料化学工程国家重点实验室开放课题基金“高性能碳化硅膜构筑与丙烷脱氢膜反应过程研究”(KL21-04)。

摘　　要：采用长度为30cm的管式NaA分子筛膜,对含有银杏叶提取物的水-乙醇体系进行渗透汽化分离;考察了操作温度、水-乙醇浓度以及银杏叶提取物的浓度对膜分离性能的影响,结果表明NaA分子筛膜具有良好的分离性能,在70℃下,对于90wt%的水/乙醇溶液,通量高达2.0kg·m^(-2)·h^(-1),且水/乙醇的分离因子高于50000。在提取工艺中,NaA分子筛膜的引入,不仅可以通过醇水分离浓缩银杏叶主要成分,而且对银杏叶主要成分异鼠李素、山奈酚以及槲皮素的化学结构无影响。长期渗透汽化(150h)运行结果表明NaA分子筛膜具有良好的分离稳定性和工作寿命。研究结果对NaA分子筛膜应用于银杏叶提取工艺中有机溶剂的回收提供了有益的参考。Tubular NaA zeolite membrane with length of 30 cm was fabricated and applied to the per-vaporation of water-ethanol system containing Ginkgo biloba extraction.The effects of operating tem-perature,water-ethanol concentration and the extraction concentration on the separation performance of the membrane were investigated.The results indicated the excellent separation performance of the NaA zeolite membrane.At 70℃,the flux of NaA zeolite membrane was as high as 2.0 kg·m^(-2)·h^(-1) for water feed of 90 wt%with separation factor of water/ethanol above 50000.The membrane separation not only concentrated the components of the Ginkgo biloba extraction,but also protected the chemical structures of the isorhamnetin,kaempferol and quercetin in the extraction.Furthermore,the long-term(150 h)operation results showed that the NaA zeolite membrane had good separation stability and du-rability.The study provided reference for the application of the membrane in the recovery of organic solvent(ethanol)in the extraction process of Ginkgo biloba leaves.

关 键 词：膜分离 银杏叶提取 NAA分子筛膜 渗透汽化 水-乙醇分离 

分 类 号：TQ028.8[化学工程]