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题名: Density estimated physicochemical properties of alanine-based ionic liquid [C7mim][Ala] and its application in selective transesterification of soybean oil
作者: Fang DaWei1, 2;  Li Meng1, 3;  Ge RiLe1;  Zang ShuLiang2, 3;  Yang JiaZhen2;  Gao YanAn1
关键词: alanine ;  ionic liquid ;  density ;  transesterification
刊名: SCIENCE CHINA-CHEMISTRY
发表日期: 2012-08-01
DOI: 10.1007/s11426-012-4646-2
卷: 55, 期:8, 页:1677-1682
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Multidisciplinary
研究领域[WOS]: Chemistry
英文摘要: Amino acid ionic liquid (AAIL) based on alanine, 1-n-heptyl-3-methylimidazolium alanine ([C(7)mim][Ala]), has been prepared and characterized. Since the IL can form strong hydrogen bonds with water, trace amount of water is a problematic impurity in the IL. Using the standard addition method (SAM), the densities were measured in the temperature range from 293.15 to 343.15 +/- 0.05 K. On the basis of the experimental data of density, the surface tension gamma, molar volume, and the molecular volume V (m), molar enthalpy of vaporization Delta(1) (g) H (m) (0), and the thermal expansion coefficients alpha, for [C(7)mim][Ala] were estimated using semi-empirical methods. Also the interstice model has been verified with good accordance. Then the [C(7)mim][Ala] was taken as catalyst in the transesterification reaction with fatty acid, where soybean oil was used as raw material and methanol as reactant. The amount of catalyst, alcohol consumption, reaction time, temperature and other factors of the reaction were investigated. Using GC determination, the conversions were calculated by the internal standard method. The main ingredients of the products were identified by GC-MS as palm methyl ester and linoleic acid methyl ester only, which showed high selectivity in palmitic acid and linoleic acid.
关键词[WOS]: SURFACE-TENSION ;  BIODIESEL ;  TEMPERATURE ;  CHLOROALUMINATE ;  SPECTROSCOPY
语种: 英语
WOS记录号: WOS:000307351500027
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/143048
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, China Ion Liquid Lab, Dalian 116023, Peoples R China
2.Liaoning Univ, Inst Rare & Scattered Elements Chem, Shenyang 110036, Peoples R China
3.Liaoning Shihua Univ, Sch Chem & Mat Sci, Fushun 113001, Peoples R China

Recommended Citation:
Fang DaWei,Li Meng,Ge RiLe,et al. Density estimated physicochemical properties of alanine-based ionic liquid [C7mim][Ala] and its application in selective transesterification of soybean oil[J]. SCIENCE CHINA-CHEMISTRY,2012,55(8):1677-1682.
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