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US 5,346,628 AGranted
Polymers for flocculating red mud from bayer process liquors
AssigneeNalco Chemical Company
InventorsAnthony G. Sommese, Robert P. Mahoney
Life of this patent
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Abstract
Red mud is flocculated from Bayer process liquors using a polymer which contains vinylamine and/or vinylformamide.
Claims8
A method for settling red mud from a Bayer process liquor, the method comprises adding to a Bayer process liquor containing suspended red mud a flocculant polymer which contains acrylic acid and from about 1 to about 99 mole percent of at least one monomer selected from the group consisting of vinylamine and vinylformamide.
Dependencies are inferred from the claim text.