Both water and bioethanol distilled at 90-100 oC and not able to separate out. I will try fractional distillation and desiccants to remove the water. Is there any other effective method to separate bioethanol from water?
Dear Abdul Majeed Khan,
In chemical engineering, azeotropic distillation usually refers to the specific technique of adding another component to generate a new, lower-boiling azeotrope that is heterogeneous (e.g. producing two, immiscible liquid phases), such as the example below with the addition of benzene to water and ethanol.
Dear Baboo, thanks for valuable information. The benzene will form the new azeotrope. The BP of ethanol is 78 and that of benzene is 80. How we can separate the ethanol from benzene?
@Abdul Majeed Khan. You can separate Ethanol benzene by exploiting its pressure sensitive behavior. You can try pressure swing distillation for this azeotrope.
🙋 Clean method : distillation at reduced pressure.
Below 70 Torr, EtOH do not build azeotrope with H2O and distilled in pure form (with minute amounts of water).
Liquid-ring pumps are most suitable https://en.wikipedia.org/wiki/Liquid-ring_pump because of fit vacuum range, relative cheap, robust construction and use of water as working fluid. ✌
You can try separation of the azeotropic mixture of bio-ethanol and water using benzene as a solvent.
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