TY - GEN
T1 - Pilot plant mass transfer efficiency evaluation for toluene + methylcyclohexane separation by extractive distillation with [HMIM][TCB]
AU - Quijada-Maldonado, E
AU - Meindersma, G.W.
AU - de Haan, AB
PY - 2014
Y1 - 2014
N2 - Separation of the close-boiling mixture: toluene ¿ methylcyclohexane
(MCH) has been carried out by extractive distillation (ED) using the
ionic liquid [HMIM][TCB]. High solvent-to-feed ratios are needed to
maintain one liquid phase and increased liquid phase viscosities are
expected compared to the reference solvent NMP. Experiments in an
extractive distillation pilot plant were carried out at a solvent-to-feed
mass ratio of 5 to evaluate the effect of solvent selectivity and
viscosity on the separation performance and mass transfer efficiency.
The results confirm that at the used operating conditions one liquid
phase was maintained and that with [HMIM][TCB] a MCH purity
>99.7% could be achieved. The liquid phase viscosities in the ED
column when using [HMIM][TCB] appeared four times higher than
with NMP. As a result the mass transfer efficiency decreased, which
was reflected in a doubling of the HETP (height equivalent to a
theoretical plate) compared to NMP
AB - Separation of the close-boiling mixture: toluene ¿ methylcyclohexane
(MCH) has been carried out by extractive distillation (ED) using the
ionic liquid [HMIM][TCB]. High solvent-to-feed ratios are needed to
maintain one liquid phase and increased liquid phase viscosities are
expected compared to the reference solvent NMP. Experiments in an
extractive distillation pilot plant were carried out at a solvent-to-feed
mass ratio of 5 to evaluate the effect of solvent selectivity and
viscosity on the separation performance and mass transfer efficiency.
The results confirm that at the used operating conditions one liquid
phase was maintained and that with [HMIM][TCB] a MCH purity
>99.7% could be achieved. The liquid phase viscosities in the ED
column when using [HMIM][TCB] appeared four times higher than
with NMP. As a result the mass transfer efficiency decreased, which
was reflected in a doubling of the HETP (height equivalent to a
theoretical plate) compared to NMP
M3 - Conference contribution
SP - 1
EP - 7
BT - conference proceedings 10th International Conference on DISTILLATION & ABSORPTION
A2 - s.n., null
PB - s.n.
CY - s.l.
T2 - 10th International Conference on DISTILLATION & ABSORPTION 2014, Friedrichshafen · Germany
Y2 - 14 September 2014 through 17 September 2014
ER -