Systems and methods for alumina production
AssigneeSolenis Technologies, L.P.
InventorsClive Roscoe, Lawrence J. Andermann
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Abstract
A method for isolating a humic substance from alumina process liquor is provided herein. Separate from or within the method, bauxite is processed to form the alumina process liquor. The method includes providing a diallyldimethylammonium chloride-containing polymer. The method further includes providing an amine-containing polymer. The method further includes combining the diallyl dimethyl ammonium chloride, the amine-containing polymer, and the alumina process liquor, to isolate the humic substance from the alumina process liquor.
Claims14
A method for isolating a humic substance from alumina process liquor, wherein bauxite is processed to form the alumina process liquor, the method comprising:
- providing a diallyldimethylammonium chloride-containing polymer;
- providing an amine-containing polymer chosen from polyethyleneimine, polyallylamine, polydimethylamine, or copolymers thereof;
- the reaction product of a polyamine and an amine-functionalized crosslinking agent containing two or more amine moieties;
- and
- combinations thereof;
- and
- combining the diallyl dimethyl ammonium chloride, the amine-containing polymer, and the alumina process liquor to isolate the humic substance from the alumina process liquor.
A method for isolating a humic substance from alumina process liquor, wherein bauxite is processed to form the alumina process liquor, the method comprising:
- providing polydiallyldimethylammonium chloride;
- providing poly(dimethylamine-co-epichlorohydrin);
- and
- combining the polydiallyldimethylammonium chloride, the poly(dimethylamine-co-epichlorohydrin), and the alumina process liquor to isolate the humic substance from the alumina process liquor, wherein the polydiallyldimethylammonium chloride and the poly(dimethylamine-co-epichlorohydrin) are combined in a weight ratio of from 1:2 to 2:1 and in a combined amount of from about 50 ppm to about 200 ppm based on a total amount of the alumina process liquor.
Dependencies are inferred from the claim text.