Liquid purification or separation – Processes – Liquid/liquid solvent or colloidal extraction or diffusing...
Patent
1982-03-11
1986-11-18
Sadowski, David
Liquid purification or separation
Processes
Liquid/liquid solvent or colloidal extraction or diffusing...
210675, 210189, 210264, 210268, B01D 1502
Patent
active
046234667
ABSTRACT:
This invention provides a method and an apparatus for effecting counter-current mass exchange between two non-miscible phases A and B, for example a liquid phase A and a liquid or solid phase B, circulating in opposite directions from one end to an opposite end of a vertical tower comprising a plurality of superposed chambers in which the first phase A is caused to circulate continuously and the second phase B is caused to circulate discontinuously. One chamber is empty and is adapted to receive the phase B contained in the next chamber thereabove, the two chambers being isolated from any supply of phases A and B. A small fraction of the liquid phase A is diverted for directing continuously this phase to the other chambers of the tower, the thus diverted fraction being introduced into the next chamber above the empty chamber for carrying away the phase B contained in the lower empty chamber, this diverted fraction being reintroduced into the circuit.
REFERENCES:
patent: 3136719 (1964-06-01), Serra
patent: 3862032 (1975-01-01), Dixson et al.
patent: 4035292 (1977-07-01), Himsley
patent: 4229292 (1980-10-01), Mori et al.
Degremont
Sadowski David
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