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US 4,146,573 AGranted
Red mud treatment
AssigneeNalco Chemical Company
InventorJames Kane
Life of this patent
Estimating the term…
Abstract
Red mud slurries can be solidified by adding thereto certain fatty substituted quaternary ammonium salts.
Claims3
A method of solidifying concentrated aqueous slurries of red mud which comprises:
- (A) adding to the suspension of red mud with mixing from 0.045-0.40 pounds per metric ton of red mud solids of a quaternary ammonium salt containing at least 1 aliphatic group of at least 8 carbon atoms;
- (B) continuing mixing until the red mud has set up to a rigid mass;
- and then,
- (C) recovering a solidified concentrated red mud.
1 more element
Dependencies are inferred from the claim text.