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US 5,707,912 AGranted
Process for the treatment of clay materials to provide slurries having improved rheological properties
AssigneeThiele Kaolin Company
InventorsRobert A. Lowe, Prakash B. Malla
Life of this patent
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Abstract
Clay materials, such as kaolin, containing expandable layer-silicates are chemically treated with a source of magnesium cations, followed by a pH adjustment, to provide a slurry product having improved rheological properties.
Claims20
A process for treating clay materials which contain expandable layer-silicates, wherein the process comprises the steps of:
- A. obtaining an initial slurry of a clay material which contains expandable layer-silicates;
- B. treating the clay slurry with a source of magnesium cations;
- and
- C. adding a base solution to the treated clay slurry to achieve a molar ratio of hydroxide:magnesium ions of about 1.0:1.0 to about 2.5:1.0,
- whereby a treated clay is produced having rheological properties which are improved over the rheological properties of the initial clay slurry when compared at equivalent solids content.
2 more elements
A clay slurry produced by a process which comprises the steps of:
- A. obtaining an initial slurry of a clay material which contains expandable layer-silicates;
- B. treating the clay slurry with a source of magnesium cations;
- and
- C. adding a base solution to the treated clay slurry to achieve a molar ratio of hydroxide:magnesium ions of about 1.0:1.0 to about 2.5:1.0,
- whereby a treated clay is produced having rheological properties which are improved over the rheological properties of the initial clay slurry when compared at equivalent solids content.
2 more elements
Dependencies are inferred from the claim text.