Liquid membranes
Liquid membranes
Membrane Technology
" Liquid Membranes
Membrane contactors
Organic liquid + surfactant (membrane)
Possible
configuration
for LM.
Aqueous phase
Emulsion liquid Mem.
Receiving phase
Porous Organic liquid impregnated
Support into the pores
SLM
Membrane based processes Extraction of valuable organics
MBSE (Extraction) MBSS (Stripping)
Loaded stripping solution
Feed
Feed Solvent Solvent Stripping
& &
solution
VF1, cF1 VR2 , cR2
Sw
Sw
&
VS1 , cS1
Fiber Fiber
F S S R
wall
wall
Extractor Stripper
RSw
(MBSE) (MBSS)
Sw S
F S Sw R
&
cSw, F VS2 , cS2
cS
cSw,S
Solvent
&
cF circuit VR1, cR1
Raffinate
cFS
cSR
cSw,S
&
VF2, cF2 Fresh stripping
cS cR
solution
RSb RSw RR
RF RSw RSb
S.Schlosser, Permea 2005 S.Schlosser, Permea 2005
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Membrane Technology
O
O O
Ag+
" Liquid Membranes
Bioreactor with separation unit O O
O
MB
Ag+ M + B
O
M: selectively separated B: selective carrier
O O
O O diphenyl-18-crown-6
O
N
MB
M M
O
B
P
Liquid Membrane
Facilitated Transport in Liquid Membrane.
S.Schlosser, J.Martak, R.Keresz, SepPurTechnol, 41(2005)237
Membrane Technology
" Liquid Membranes
- ELM: low practical interest
- SLM: lab scale and few applications restricted
high added value compounds.
- Hydrophobic Membranes (PE, PP ...).
- Hollow fibers.
- Potential applications:
" Selective removal and concentration of cations in solution.
" Selective separation of gases.
" Recovery of acid or basic compounds.
" Organic compound separation in complex mixtures.
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