New Brønsted-Acidic Ionic Liquids Based on 8-hydroxyquinoline Cation as Catalysts for the Esterification Reaction of n-hexylic acid
- DOI
- 10.2991/ap3er-15.2015.60How to use a DOI?
- Keywords
- ionic liquid; 8-hydroxyquinoline; catalyst; esterification; long-chain fatty acid
- Abstract
Five new acidic ionic liquids were firstly synthesized from 8-hydroxyquinoline and five kinds of acid such as H2PO4, H2SO4, CH3SO3H, TSOH, HBF4 by one-pot method. The structures of the synthesized compounds were characterized by 1H NMR, IR and MS. Acidities of the ILs was determined by Hammett acidity with the method of UV-Vis spectroscopic measurement. Because of the combinational advantages of homogeneous and heterogeneous catalysis, these new catalysts showed good reactivity under mild conditions and recoverability by simple filtration after reaction. The yield of esterification reaction was measured by GC. The acidity order of the novel ILs is HSO4- > BF4-> CH3SO3->TSO-> H2PO4-. The order of acidity of ILs were shown in the result of acidities of the ILs and the yield related the ILs showed the same trend. Therefore, The ionic liquid with HSO4- as anion exhibited the best catalytic performance. The conversion yield of n-hexylic acid was up to 91.4% under the conditions.
- Copyright
- © 2015, the Authors. Published by Atlantis Press.
- Open Access
- This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).
Cite this article
TY - CONF AU - Lincai Peng AU - Lingxiang Pu AU - Chen Chen AU - Shun Yao AU - Tian Yao AU - Hang Song PY - 2015/06 DA - 2015/06 TI - New Brønsted-Acidic Ionic Liquids Based on 8-hydroxyquinoline Cation as Catalysts for the Esterification Reaction of n-hexylic acid BT - Proceedings of the 2015 Asia-Pacific Energy Equipment Engineering Research Conference PB - Atlantis Press SP - 257 EP - 260 SN - 2352-5401 UR - https://doi.org/10.2991/ap3er-15.2015.60 DO - 10.2991/ap3er-15.2015.60 ID - Peng2015/06 ER -