Liquid purification or separation – Processes – Preventing – decreasing – or delaying precipitation,...
Patent
1998-11-30
2000-07-11
Hruskoci, Peter A.
Liquid purification or separation
Processes
Preventing, decreasing, or delaying precipitation,...
210734, 423121, 423122, B01D 2101
Patent
active
06086771&
ABSTRACT:
The present invention is directed to improvements in the Bayer mining process, used for the recovery of alumina from bauxite ore. Water-continuous emulsion polymers are advantageously used to improve the clarification, filtration and scale control of red-mud containing liquors generated during the Bayer process. Preferred polymers are high molecular weight poly(methyl acrylate/acrylic acid), poly(methyl acrylate), poly(vinyl acetate/acrylic acid/methyl acrylate) and a combination of a high molecular weight poly(methyl acrylate/acrylic acid) with a lower molecular weight poly(methyl acrylate/acrylic acid).
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Counter James A.
Phillips Everett C.
Selvarajan Radhakrishnan
Strominger Michael G.
Breininger Thomas M.
Hruskoci Peter A.
Martin Michael B.
Nalco Chemical Company
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