Microwave-assisted extraction of Xianfeng lignite in 1-butyl-3-methyl-imidazolium chloride

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• 作者：Zhiping Lei ; ^{zplei@ahut.edu.cn} ; Lian Wu ; Yanqiu Zhang ; Hengfu Shui ; ^{shhf@ahut.edu.cn} ; Zhicai Wang ; Chunxiu Pan ; Haiping Li ; Shibiao Ren ; Shigang Kang
• 关键词：Lignite ; Extraction ; [Bmim]Cl
• 刊名：Fuel
• 出版年：2012
• 出版时间：May 2012
• 年：2012
• 卷：95
• 期：Complete
• 页码：630-633
• 全文大小：446 K

文摘

The extraction of Xianfeng lignite (XL) with ionic liquid-1-butyl-3-methyl-imidazolium chloride ([Bmim]Cl) was carried out at mild conditions under microwave irradiation in this work. The effects of the temperature, XL to [Bmim]Cl ratio and acid pretreatment on extract yield of lignite and product compositions were investigated. The extraction results of XL indicated that [Bmim]Cl has high performance on the extraction of the XL. With the increases of extraction temperature and mass ratio of [Bmim]Cl to lignite the extract yield of XL in [Bmim]Cl significantly increases. FT-IR measurements for XL, its extracts and residues at different mass ratio of XL/[Bmim]Cl indicated that [Bmim]Cl can break the non-covalent interactions such as hydrogen bonds and extracts the aromatics fractions from lignite.