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Chemcial Industry and Engineering 2017, Vol. 34 Issue (3) :37-42    DOI: 10.13353/j.issn.1004.9533.20151115
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Prediction of Refractive Indices of Ionic Liquids by a Group Contribution Method
Li Xiaobing, Cui Xianbao, Feng Tianyang, Jie Huimin, Xu Li, Lin Ruirong
State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China

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Abstract 

Based on the study of refractive indices of ionic liquids, a group contribution method is proposed to predict the refractive indices of ionic liquids at different temperatures. Refractive indices of 115 ionic liquids(ILs) including 5 kinds of cations and 26 kinds of anions were collected from literature, and 39 groups were obtained by a new group dividing method. The contribution values of 39 groups were obtained by regressing 1 161 data of refractive indices(λ=589 nm). The standard deviation and the average relative deviation the regression are 0.00897 and 0.452%, respectively. In order to testify the reliability of the model, the proposed model was used to estimate the refractive indices of two ILs which are not involved in the 115 ILs. The average relative deviations of the predictions are 0.520% and 0.284%, respectively, which proves the group contribution method for predicting the refractive indices of ionic liquids at different temperatures is reliable.

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Articles by authors
Li Xiaobing
Cui Xianbao
Feng Tianyang
Jie Huimin
Xu Li
Lin Ruirong
Keywordsgroup contribution method;   ionic liquid;   refractive index     
Received 2015-10-21;
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Li Xiaobing, Cui Xianbao, Feng Tianyang, Jie Huimin, Xu Li, Lin Ruirong.Prediction of Refractive Indices of Ionic Liquids by a Group Contribution Method[J]  Chemcial Industry and Engineering, 2017,V34(3): 37-42
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