Chemistry: electrical and wave energy – Processes and products – Electrostatic field or electrical discharge
Patent
1983-03-24
1985-02-26
Williams, Howard S.
Chemistry: electrical and wave energy
Processes and products
Electrostatic field or electrical discharge
204180R, 204185, 210748, C02F 146
Patent
active
045016488
ABSTRACT:
An aqueous suspension of fine mineral solids, for example oil sand tailings sludge, is separated into separate solid and liquid components by first chemically conditioning the suspension with the addition of lime, and thereafter passing an electrical potential between electrodes submerged in the suspension. The electrical potential causes the solids to migrate toward, and deposit on, the positive of the electrodes. The lime pre-treatment allows the electrode deposit to dry, through electroosmosis, to render it sufficiently dry by disposal. The chemical conditioning step preferably includes adding a carbonate- or bicarbonate-forming reagent after the lime addition.
REFERENCES:
patent: 541335 (1895-06-01), Salzburger
patent: 3962069 (1976-06-01), Inoue et al.
patent: 4367132 (1983-01-01), Bell et al.
Alberta Oil Sands Technology and Research Authority
Chapman Terryence
Johnson Ernest Peter
Williams Howard S.
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