Page 26 - PIGNAT catalogue 2020 GB_092020

LIQUID-LIQUID EXTRACTION

ELA/2000 STIRRED LIQUID-LIQUID EXTRACTION

➢ Liquid - Liquid extraction in a stirred column

Study of a continuous liquid-liquid extraction
Process parameters
Interphase level determination

Ternary diagram
Mass balance
Column effiency determination (HUT/NUT)

General specifications • Inter-phase level setting by lateral
crosshead.
• 2 SS/PEEK pumps.
• 4 sampling valves.
• Glass decanter with light phase
outlet, heavy phase feeding. • Polyethylene storage tank, 10 L.

• Glass column. Instrumentation
• Stirring shaft, made of SS • 2 flowmeters.
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www.pignat.com Dim: 140 x 60 x 240 cm - 120 kg
Rushton type stirrer.

• Glass decanter with heavy phase
100 - 240 V
Ventilation
outlet, light phase feeding.
1ϕ - 50/60 Hz

9

7
11

3 6
8
Liquid-liquid extraction is a fundamental material transfer
operation based on the varying solubility of the
components of a mixture. It entails extracting a compound
from a solution (solute dissolved in a diluent) by selective PE PE PE PE
transfer to a second liquid (solvent), non-miscible with the 0,5 L 0,5 L
first and with different density. 2 P1 5 P2 10
12 13
A stirring device 9, allows to stir the liquid in the column,
increasing the contact between the two phases and the
mass transfer from one to another.
1 4
10 L 10 L
10 L 10 L

26 Chemical engineering & unit operations