C - Chemistry – Metallurgy – 25 – C
Patent
C - Chemistry, Metallurgy
25
C
204/89, 204/114.
C25C 1/00 (2006.01) C02F 1/46 (2006.01) C02F 1/461 (2006.01) C02F 1/467 (2006.01) C25C 7/00 (2006.01)
Patent
CA 1142878
ABSTRACT OF THE DISCLOSURE The present invention provides a process for electro- lytically removing metal ions from a solution thereof by means of an electrochemical cell having an anode compartment, a cath- ode compartment and a diaphragm separating said compartments, said process comprising passing the solution upwardly through a bed of particles acting as cathodes in the cathode compart- ment of the cell and thereby bringing said bed to a fluidized state, recirculating a part of the solution leaving the cathode compartment through said bed and discharging the remainder there- of from the cell, passing an anode liquid through the anode com- partment, passing said recirculated solution through a separa- tor for gas present in the solution while maintaining in the se- parator a liquid surface of the solution and ventilating the space above the solution, said separator having a dividing sur- face with at least one opening for the passage of gas bubbles, maintaining an upward flow of the treated solution, flowing under the dividing surface the solution from the cathode compartment to the separator and returning said recirculated part of the solution to the cathode compartment, maintaining the liquid sur- face above the said dividing surface. discharging the treated solution from above the dividing surface, and maintaining a liquid surface in the top of the cathode compartment with at least one highly constricted part through which at least one cathode rod passes with a small clearance. The present invention also provides an apparatus for use in the process.
328281
Geelen Marinus A.
Raats Christiaan M.s.
Marks & Clerk
Shell Internationale Research Maatschappij B.v.
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