Use of Polyols as Scale Control Reagents in the Mining Processes
AssigneeNalco Company
InventorsJing Wang, Xiaojin Harry 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.
Claims21
1-24. (canceled)
A method of increasing stability of a pregnant liquor of a Bayer process comprising:
- adding to the pregnant liquor of a Bayer process a linear or branched polyol having a molecular weight of from 500 to 1,000,000.
A pregnant Bayer liquor comprising a branched polyol having a molecular weight of from 500 to 1,000,000 at a concentration of at least 0.1 ppm.
A pregnant Bayer liquor comprising a linear polyol having a molecular weight of from 500 to 1,000,000 at a concentration of at least 0.1 ppm.
Dependencies are inferred from the claim text.