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US 10,457,584 B2Granted
Alternative additives to enhance slurry dewatering
AssigneeEcolab USA Inc.
InventorCarl N. Urbani
Life of this patent
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Abstract
The invention provides methods and compositions for improving dewatering of mineral slurry. The method comprises adding an R-Succinic Compound (such as octadecenyl succinic acid, hexadecenyl succinic acid, and/or dodecenyl succinic acid) to the slurry. The R-Succinic Compound removes water that would otherwise be trapped within the filtered slurry cake.
Claims17
A method of separating alumina trihydrate crystals from an alumina trihydrate bearing slurry, the method comprising:
- combining an alkenyl succinic anhydride and water;
- adding the combination to the slurry;
- and separating alumina trihydrate crystals from the slurry.
A method of separating alumina trihydrate crystals from an alumina trihydrate bearing slurry, the method comprising:
- adding a composition comprising water, an R-succinic compound and an alkenyl succinic anhydride to the slurry;
- and separating alumina trihydrate crystals from the slurry, wherein the R-succinic compound has a structure selected from formula (I) or formula (II), a conjugate acid-base of the R-succinic compound having a structure selected from formula (I) or formula (II), and combinations thereof;
- wherein formula (I) is
- and formula (II) is
- and wherein R and R′ are independent, distinct, and represent alkyl, alkenyl, or aromatic hydrocarbon groups containing 1-30 carbon atoms.
2 more elements
Dependencies are inferred from the claim text.