From: Using metrics and sustainability considerations to evaluate the use of bio-based and non-renewable Brønsted acidic ionic liquids to catalyse Fischer esterification reactions
Catalyst
Molar equivalents of ethanol
Solvent
Temp./K
Yield (purity)
Ref.
[H-NMP][OCym] (25 mol%)
3 equivalents
None
293
50% (66%)
This work.
p-CSA (1 mol%)
1 equivalent
p-Cymene
323
71% (>95%)
[32]
5 (5 mol%)
30 equivalents
Aqueous ethanol
353
85% (>99%)
[49]
Sulphuric acid (2 mol%)
2 equivalents
Benzene
81%
[50]