| 表面活性剂双水相萃取分离氨基酸研究 |
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| 引用本文： | 朱慎林,朴香兰,沈刚. 表面活性剂双水相萃取分离氨基酸研究[J]. 化学工程, 2006, 34(3): 4-6 |
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| 作者姓名： | 朱慎林 朴香兰 沈刚 |
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| 作者单位： | 清华大学,化学工程联合国家重点实验室,北京,100084;清华大学,化学工程联合国家重点实验室,北京,100084;清华大学,化学工程联合国家重点实验室,北京,100084 |
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| 摘 要： | 用溴化十二烷基三乙铵(C12NE)与十二烷基硫钠(SDS)混合体系形成双水相,测定混合摩尔比与分相比例的关系,并以苯丙氨酸为萃取对象研究其在双水相体系中的分配及多级错流萃取效果。实验结果表明,当C12NE与SDS摩尔比为(1.6∶1)—(1.7∶1)时体系有分相,其中当C12NE与SDS摩尔比为1.65∶1时,分相所得上下相体积比为1∶1,且分相时间为10 m in左右,为适合实验条件。双水相体系萃取苯丙氨酸的结果表明,单级萃取率可达80%以上,二级萃取率可达99%以上。
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| 关 键 词： | 表面活性剂 双水相 萃取分离 氨基酸 |
| 文章编号： | 1005-9954（2006）03-0004-03 |
Separation of amino acids by aqueous surfactants two-phase extraction |
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| ZHU Shen-lin,PIAO Xiang-lan,SHEN Gang. Separation of amino acids by aqueous surfactants two-phase extraction[J]. Chemical Engineering, 2006, 34(3): 4-6 |
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| Authors: | ZHU Shen-lin PIAO Xiang-lan SHEN Gang |
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| Affiliation: | State Key Laboratory of Chemical Engineering, Tsinghua University, Beijing 100084, China |
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| Abstract: | Aqueous surfactants two-phase system was formed by dodecyl thiethylammonium bromide(C_(12)NE cationic surfactant) and sodium dodecyl sulfate(SDS,anionic surfactant) mixture,and the effect of surfactant molar ratio on two phase volume ratio was measured.The distribution coefficient of phenylalanine in ASTP and multi-stage cross-current extraction were also studied.The results show that aqueous two-phase system can be formed as(C_(12)NE)/ SDS at(1.6 ∶1)-(1.7 ∶1),two phase volume ratio is 1 ∶1 as C_(12)NE/ SDS at 1.65 ∶1 and its separation time is (about) 10 min.With two phase volume ratio at 1 ∶1,ASTP extraction rate can reach 80% above by one-stage(extraction) and 99% above by two-stage cross current extraction. |
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| Keywords: | surfactants aqueous two phases extraction amino acids |
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