Citation: WANG Lu-lu, WANG Ji-lin, FENG Rui-jiang, ZHANG Yang, ZHANG Fan. Synthesis of Brønsted dicationic basic ionic liquid and its catalytic activity for biodiesel production[J]. Journal of Fuel Chemistry and Technology, ;2015, 43(1): 59-64. shu

Synthesis of Brønsted dicationic basic ionic liquid and its catalytic activity for biodiesel production

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School of Petroleum and Chemical Technology, College of Chemistry, Chemical Engineering and Environmental Engineering, Liaoning Shihua University, Fushun 113001, China

Corresponding author: WANG Ji-lin,
Received Date: 31 July 2014
Available Online: 8 October 2014
Fund Project: 辽宁省科技厅博士启动项目(20141126) (20141126) 辽宁省教育厅科学研究一般项目(L2013153) (L2013153) 辽宁石油化工大学博士启动基金(2013XJJ-006). (2013XJJ-006)

A new Brønsted basic dicationic morpholine ionic liquid (IL) was synthesized with N-methyl morpholine and 1,4-dibromobutane via a two-step procedure. The structure of new dicationic IL was characterized by FT-IR, ¹H NMR spectra and elemental analysis and the thermal stability was analyzed by TGA. Meanwhile, the alkalinity and solubility of the dicationic IL were measured and its catalytic activity in the transesterification of soybean with methanol to produce biodiesel was investigated. The results show that under the optimized conditions of n(methanol)/n(soybean oil) = 14, catalyst amount of 5% based on soybean oil, 60 ℃ and 5 h, the yield of biodiesel reaches 95.6%. After recycled by drying under vacuum, the dicationic IL can be reused for more than 6 times without significant decrease in the catalytic activity.
- dication,
- basic ionic liquid,
- biodiesel,
- soybean oil,
- transesterification
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