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US 2009/0130006 A1Published application
Use of polyols as scale control reagents in the mining processes
AssigneeNalco Company
InventorsJing Wang, Xiaojin Li, Heinrich Enoch Bode
Life of this patent
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Abstract
In the mining process, linear, branched, hyperbranched or dendrimeric polyols or mixtures thereof are employed as process stabilization aids for aqueous solutions and, or suspensions of metal salts. A specific application area of the polyols is the stabilization of bauxite liquor in the Bayer process of producing alumina from bauxite.
Claims24
A method for increasing stability in process salt solutions of mining systems by:
- i. adding to the solution one or more polyols;
- ii. distributing the polyols through the solution;
- and
- iii. stabilizing the salt in the process solution.
1 more element
A method for improving aluminate stability in pregnant Bayer liquor comprising:
- (i) adding to the pregnant Bayer liquor one or more polyols
- (ii) mixing the polyols through the pregnant Bayer liquor;
- and
- (iii) stabilizing the aluminate in the pregnant Bayer liquor.
1 more element
A method for increasing aluminate stability in the red mud circuit of the Bayer process comprising:
- iv. adding to the solution one or more polyols;
- v. distributing the polyols through the solution;
- and
- vi. stabilizing the salt in the process solution.
1 more element
Dependencies are inferred from the claim text.