| 乙酸乙酯混合溶剂精制塔拉单宁工艺研究 |
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| 引用本文： | 秦清,徐浩,王金鍫,陈文文,杜运平,张宗和,黄嘉玲. 乙酸乙酯混合溶剂精制塔拉单宁工艺研究[J]. 林产化学与工业, 2012, 32(2): 83-86 |
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| 作者姓名： | 秦清 徐浩 王金鍫 陈文文 杜运平 张宗和 黄嘉玲 |
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| 作者单位： | 1. 中国林业科学研究院 林产化学工业研究所;生物质化学利用国家工程实验室;国家林业局 林产化学工程重点开放性实验室;江苏省生物质能源与材料重点实验室, 江苏 南京 210042;;2. 南京龙源天然多酚合成厂, 江苏 南京 210032 |
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| 基金项目： | 国家林业局林业公益性行业科研专项(201004013) |
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| 摘 要： | 用乙酸乙酯萃取精制粗塔拉单宁,粗单宁、水、乙酸乙酯之比1∶1.5∶4(g∶mL∶mL),60℃下萃取30 min,其单宁得率为40.2%,单宁纯度80.4%,得率与纯度均偏低。用乙酸乙酯二次萃取其残留水相得率也偏低。对粗制的塔拉单宁用乙酸乙酯与S溶剂(体积比4∶1)混合溶剂进行精制,其最佳工艺条件是:料液比为m(粗单宁)∶V(水)∶V(混合溶剂)1∶1.5∶5(g∶mL∶mL),萃取温度60℃,萃取时间30 min。在该工艺条件下产品得率68.2%,单宁纯度86.0%,单宁提取率87.7%,得率和纯度都有提高。
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| 关 键 词： | 塔拉 单宁 乙酸乙酯 混合溶剂 |
Refining of Tara Tannin with Ethyl Acetate Mixed Solvent |
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| QIN Qing,XU Hao,WANG Jin-qiao,CHEN Wen-wen,DU Yun-ping,ZHANG Zong-he,HUANG Jia-ling. Refining of Tara Tannin with Ethyl Acetate Mixed Solvent[J]. Chemistry & Industry of Forest Products, 2012, 32(2): 83-86 |
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| Authors: | QIN Qing XU Hao WANG Jin-qiao CHEN Wen-wen DU Yun-ping ZHANG Zong-he HUANG Jia-ling |
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| Affiliation: | 1.Institute of Chemical Industry of Forest Products,CAF;National Engineering Lab.for Biomass Chemical Utilization;Key and Open Lab.of Forest chemical Engineering,SFA;Key Lab.of Biomass Energy and Material,Jiangsu Province, Nanjing 210042,China;2.Nanjing Longyuan Natural Polyphenol Synthesis Factory,Nanjing 210032,China) |
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| Abstract: | Crude tara tannin was extracted by water and ethyl acetate at 60 ℃ for 30 min.The ratio of crude tannin-water-ethyl acetate was 1 ∶ 1.5 ∶ 4(g ∶ mL ∶ mL).The yield of product was 40.2 % and the purity of tannin was 80.4 %.Both yield and purity are low.The yield was still low when ethyl acetate was used to extract the recidual water phase.Refining tara tannin with mixed solvent of ethyl acetate and S-solvent(4 ∶ 1) was studied.The optimum conditions are: solid to liquid ratio of m(crude tara tannin) ∶ V(water) ∶ V(mixed solvent)1 ∶ 1.5 ∶ 5(g ∶ mL ∶ mL),extraction temperature 60 ℃,extraction time 30 min.Under this condition,the yield of product was 67.1 %-69.0 %,the purity of tannin was 85.3 %-86.5 %,the extraction rate of tannin was 87.2 %-88.6 %.The yield and purity has been improved. |
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| Keywords: | tara tannin ethyl acetate mixed solvent |
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