Stabilized magnesium hydroxide slurry
AssigneeMartin Marietta Magnesia Specialties Inc.
InventorsAlvin Richmond, Robert J. Gutowski
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Abstract
A method for producing a stabilized magnesium hydroxide slurry comprising physically deflocculating the magnesium hydroxide solids in a starting slurry to produce a stabilized magnesium hydroxide slurry. Depending on the chloride level of the starting slurry, a cationic polymer may be added to the slurry. Optionally a thickening agent may be added to the deflocculated slurry. Also disclosed is a stabilized magnesium hydroxide slurry produced by the method which may be transported and stored without substantial agglomeration of the magnesium hydroxide solids.
Claims19
A method for producing a stabilized magnesium hydroxide slurry comprising:
- providing a starting magnesium hydroxide slurry including loose agglomerations of magnesium hydroxide solids, said slurry having a chloride content of 0.43-0.75% by weight on an MgO basis and having a viscosity which enables substantially all of the magnesium hydroxide solids in the slurry to be physically deflocculated, said magnesium hydroxide solids comprising 50 to 60%, by weight, of the slurry;
- adding Holly Fix 1, a cationic polymer, to said starting slurry;
- and
- physically deflocculating the magnesium hydroxide solids to produce a magnesium hydroxide slurry that is stabilized such that any settlement that occurs is resuspendable by air sparging within a period of 30 days from production.
A stabilized magnesium hydroxide slurry comprised of about 50 to 60%, by weight, deflocculated magnesium hydroxide solids, 0.43-0.75% by weight chloride on a MgO basis, and Holly Fix 1, a cationic polymer, said magnesium hydroxide solids suspended within the slurry such that any settlement that occurs is resuspendable by air sparging within a period of 30 days from production.
A stabilized magnesium hydroxide slurry produced by the process of:
- providing a starting magnesium hydroxide slurry including loose agglomerations of magnesium hydroxide solids, said slurry having a chloride content of 0.43-0.75% by weight on an MgO basis and having a viscosity which enables substantially all of the magnesium hydroxide solids in the slurry to be physically deflocculated, said magnesium hydroxide solids comprising 50 to 60%, by weight, of the slurry;
- adding Holly Fix 1, a cationic polymer, to said starting slurry;
- and
- physically deflocculating the magnesium hydroxide solids in the slurry to produce a magnesium hydroxide slurry that is stabilized such that any settlement that occurs is resuspendable by air sparging within a period of 30 days from production.
Dependencies are inferred from the claim text.