Aluminum hydroxide, made via the bayer process, with low organic carbon
AssigneeNalco Company
InventorJohn T. Malito
Life of this patent
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Abstract
A composition of matter which is aluminum hydroxide, produced using the Bayer Process, wherein the aluminum hydroxide produced has a Total Organic Carbon of less than about 0.5 milligrams Total Organic Carbon/gram aluminum hydroxide.
Claims9
In a composition of matter which is aluminum hydroxide, produced using the Bayer Process, the improvement comprising producing an aluminum hydroxide wherein the Total Organic Carbon of the aluminum hydroxide is less than about 0.5 milligrams Total Organic Carbon/gram of aluminum hydroxide.
In the Bayer Process to produce aluminum hydroxide, the improvement comprising producing said aluminum hydroxide with a Total Organic Carbon of less than about 0.5 milligrams Total Organic Carbon/gram aluminum hydroxide;
- comprising the steps of:
- a) dispersing the aluminum hydroxide in water, wherein the pH of the water is greater than about 10, to create a slurry of aluminum hydroxide in water, wherein said slurry comprises from about 50 to about 1000 grams of solids per liter of water, wherein the temperature of said slurry is from about 5° C. to about 95° C.;
- b) maintaining the solids in suspension in the slurry using any appropriate agitation technique;
- c) contacting said slurry with a mixture of ozone in oxygen wherein the concentration of ozone in oxygen is from about 1 weight percent to about 20 weight percent and the temperature of the ozone in oxygen mixture is from about 0° C. to about 30° C.;
- and
- d) collecting the aluminum hydroxide from the slurry.
Dependencies are inferred from the claim text.