Method and apparatus for precipitating colloids from aqueous sus

Details Method and apparatus for precipitating colloids from aqueous sus Method and apparatus for precipitating colloids from aqueous sus

1975-07-28

1976-06-22

Mack, John H.

Chemistry: electrical and wave energy

Apparatus

Electrolytic

204149, 204272, 204273, 204274, C25B 900, C25B 1102

Patent

active

039649911

ABSTRACT:
Colloids are precipitated from an aqueous suspension by electrolysis techniques in which a flocculation cell is provided with a soluble anode formed preferably of multi-valent material and wherein the cathode comprises a metal cylinder having an inlet at one end and an outlet at the other end and in which the anode is coaxially disposed in insulated relation to the cathode so that an aqueous suspension may be caused to flow through the cell in such manner as thoroughly and systematically to wash the inner surface of the cathode and the outer surface of the anode by following a generally helical path which inhibits formation of large clusters of hydrogen and oxygen gas established by the application of an electric potential across the cathode and anode. The pH of the aqueous solution must be controlled at a substantially neutral value and the anode preferably is formed of soluble aluminum, iron, magnesium or other multi-valent metal.

REFERENCES:
patent: 823671 (1906-06-01), Dieterich
patent: 1157233 (1915-10-01), Lashmet
patent: 1219333 (1917-03-01), Kynaston
patent: 2687996 (1954-08-01), Butler
patent: 3092566 (1963-06-01), Negus
patent: 3347786 (1967-10-01), Baer et al.
patent: 3728244 (1973-04-01), Cooley

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