Liquid purification or separation – Processes – Making an insoluble substance or accreting suspended...
Patent
1992-11-23
1993-06-08
Silverman, Stanley S.
Liquid purification or separation
Processes
Making an insoluble substance or accreting suspended...
210730, 423121, C01F 746, C02F 156
Patent
active
052176207
ABSTRACT:
A process for improved flocculation of Bayer process red mud-containing liquor uses a conventional water soluble anionic flocculant to form a red mud phase and a supernatant from the red mud-containing liquor, the supernatant containing suspended solids. The process is characterized by the addition of a water soluble clarification aid in addition to the conventional flocculant, wherein the clarification aid is pullulan, lactan, zooglan, rhamsan, or combinations thereof. The clarification aid is added to the red mud-containing liquor in an amount sufficient to reduce the concentration of suspended solids in the supernatant.
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Connelly Lawrence J.
Mahoney Robert P.
Wetegrove Robert L.
Barrett Joseph B.
McCarthy Neil M.
Miller Robert A.
Nalco Chemical Company
Norek Joan I.
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