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林产化学与工业

林产化学与工业 ›› 2008, Vol. 28 ›› Issue (3): 23-27.

• 论文 • 上一篇    下一篇

分子短程蒸馏分离银杏叶聚戊烯醇的研究

王成章1, 王婉苓2, 叶建中1, 郑光耀1, 周昊1, 陈西娟1   

  1. 1. 中国林业科学研究院, 林产化学工业研究所;国家林业局, 林产化学工程重点开放性实验室, 江苏, 南京, 210042;2. 武汉大学电子信息学院, 湖北, 武汉, 430079
  • 收稿日期:2007-08-06 修回日期:1900-01-01 出版日期:2008-06-30 发布日期:2008-06-30

Studies on Seperation of Polyprenols from leaves of Ginkgo biloba L.by Molecular Short Distillation

WANG Cheng-zhang1, WANG Wan-ling2, YE Jian-zhong1, ZHENG Guang-yao1, ZHOU Hao1, CHENG Xi-zhuan1   

  1. 1. Instutute of Chemical Industry of Forest Product, CAF;Key and Open Lab.on Forest Chemical Engineering, SFA, Nanjing 210042, China;2. School of Electronic Information, Wuhan University, Wuhan 430079, China
  • Received:2007-08-06 Revised:1900-01-01 Online:2008-06-30 Published:2008-06-30

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摘要： 以银杏叶为原料,采用皂化反应、溶剂萃取和冷冻制备聚戊烯醇不皂化物,皂化剂为5% NaOH-EtOH,石油醚软膏与皂化剂的比例为1:5(g:mL),首次采用分子短程蒸馏分离聚戊烯醇不皂化物,最佳工艺为:Ⅰ级分子蒸馏,工艺参数为冷凝温度2.5℃,循环水温度60℃,物料加热温度60℃.蒸馏温度160℃,进料速率180 mL/h,刮膜转速200 r/min,蒸馏真空度0.5～1.0 Pa;Ⅱ级分子蒸馏,工艺参数为循环水温度80℃,物料加热温度60℃,蒸馏温度280℃,进料速率180 mL/h,刮膜转速300 r/min,蒸馏真空0.1～0.5 Pa.结果表明:溶剂中聚戊烯醇为55.6%,银杏叶聚戊烯醇(GP)回收率为98.5%,馏余物中聚戊烯醇的含量由不皂化物中的46.2%提高到83.7%,而且无溶剂残留,是工业化制备高纯度聚戊烯醇理想的分离方法.

关键词: 银杏叶, 聚戊烯醇, 不皂化物, 分子短程蒸馏

Abstract: Non-saponifiable matter of polyprenols from Ginkgo biloba L. was obtained by saponification,extraction and solvent refrigeration, using 5% NaOH-EtOH as saponifier,ratio of paste of petroleum ether to saponifier 1:5(g:mL).Molecular short distillation was first used to purify non-saponifiable matter of polyprenols. For the I grade molecular distillation, the optimum operation parameters were: condensation temperature 2.5℃, circulating-water temperature 60℃, feed temperature 60℃,distillation temperature 160℃,feed flow rate 180mL/h,scraper rate 200r/min,operation pressure 0.5--0.5Pa. The results showed that content of polyprenols in solution was raised to 55.6%,recovery rate of polyprenols from G. biloba L.(GP) was 98.5%, content of polyprenols in distillate residue could be raised from 46.2% to 83.7% of non-saponifiable matter, and there was no solvent residue. Thus, this mehod would be an ideal separation method to prepare high-purity polyprenols industrially.

Key words: leaves of Ginkgo biloba L, polyprenols, non-saponifialble matter, molecular short distillation

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