Liquid purification or separation – Processes – Liquid/liquid solvent or colloidal extraction or diffusing...
Patent
1978-02-21
1980-09-09
Adee, John
Liquid purification or separation
Processes
Liquid/liquid solvent or colloidal extraction or diffusing...
210643, 210DIG5, 422259, B01D 1100
Patent
active
042216583
ABSTRACT:
An apparatus and method are disclosed for effecting liquid-liquid contact. An aqueous medium and an organic hydrophobic liquid medium are fed to a mixing chamber in which a "primary" dispersion, capable of disengaging sustantially completely into two separate layers on standing under gravity, is formed by suitable mixing means. Dispersion is allowed to flow upwardly and downwardly from the mixing chamber into upper and lower baffled zones positioned immediately above and below the mixing chamber respectively. Disengaged lighter medium is allowed to collect in an upper chamber above and communicating with the upper baffled zone, while disengaged heavier medium is allowed to collect in a lower chamber below and communicating with the lower baffled zone. Heavier medium is allowed to return to the mixing chamber from the upper baffled zone and lighter medium from the lower baffled zone. By removing the respective disengaged media from the upper and lower chambers at the same rates and in the same ratio as they are fed to the mixing chamber a favorable (e.g. 1:1) mixing ratio can be maintained in the mixing chamber despite a different (e.g. 5:1) volume feed ratio to the mixing chamber.
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patent: 4057493 (1977-11-01), Davies
"Design of Large Scale Mixer-Settlers," by J. B. Lott et al., SME Transactions, 252 (Mar. 1972).
"A New Concept in Solvent Extraction Technology," Davy Powergas Ltd. Bulletin No. 3-14675, 1976.
Adee John
Davy International (Oil & Chemicals) Limited
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