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US 8,475,584 B1Granted
Zinc clays, zinc organoclays, methods for making the same, and compositions containing the same
OwnerRaymond Lee Nipinventor
Life of this patent
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Abstract
Zinc clays, methods for preparation of zinc clays, and compositions containing the same are disclosed. The methods comprise mixing a clay with a zinc ammonia complex solution to prepare the zinc clays. Zinc clays according to the present invention may further comprise quaternary ammonium salts. The present clays may be used in compositions and/or as additives in rubber and plastic formulations and products, as nutrient delivery agents, and in catalyst formulations.
Claims33
A method for preparing a zinc clay, comprising:
- a) adding a slurry of a cation-exchangeable clay having a cation exchange capacity in a range of about 50 milliequivalents per 100 grams of clay to about 150 milliequivalents per 100 grams of clay to a zinc ammonia carbonate complex solution to form a zinc clay suspension, wherein said cation-exchangeable clay is selected from the group consisting of bentonite clays, smectite clays, vermiculite clays and mixtures thereof;
- calcium montmorillonite, sodium montmorillonite, synthetic vermiculites, and mixtures thereof;
- b) agitating and then filtering the zinc clay suspension and removing zinc ions with an aqueous composition comprising ammonia and CO2 to isolate the zinc clay, wherein the isolated zinc clay includes an amount of zinc ions that are insoluble in an aqueous solution of ammonia and carbon dioxide that exceeds the cation exchange capacity of the cation-exchangeable clay;
- and
- c) heating and drying the isolated zinc clay.
2 more elements
A method for preparing a zinc organoclay, comprising:
- a) adding a slurry of a cation-exchangeable clay having a cation exchange capacity in a range of about 50 milliequivalents per 100 grams of clay to about 150 milliequivalents per 100 grams of clay and a zinc ammonia carbonate complex solution to form a zinc clay, wherein said cation-exchangeable clay is selected from the group consisting of bentonite clays, smectite clays, vermiculite clays, and mixtures thereof
- b) agitating and then filtering the zinc clay suspension to isolate the zinc clay and removing zinc ions with an aqueous composition comprising ammonia and CO2, wherein the zinc clay includes an amount of zinc ions that are insoluble in an aqueous solution of ammonia and carbon dioxide that exceeds the cation exchange capacity of the cation-exchangeable clay;
- and
- c) mixing said zinc clay with an ammonium salt having an organic group to form said zinc organoclay.
1 more element
A method for preparing a zinc clay, comprising:
- a) treating a cation-exchangeable clay having a cation exchange capacity in a range of about 50 milliequivalents per 100 grams of clay to about 150 milliequivalents per 100 grams of clay with an acid, wherein said cation-exchangeable clay is selected from the group consisting of bentonite clays, smectite clays, vermiculite clays and mixtures thereof;
- calcium montmorillonite, sodium montmorillonite, synthetic vermiculites, and mixtures thereof;
- b) adjusting the pH of the cation-exchangeable clay to about 9 or greater with a base;
- c) adding a slurry of said cation-exchangeable clay to a zinc ammonia carbonate complex solution to form a zinc clay suspension;
- d) agitating the zinc clay suspension;
- e) heating the agitated zinc clay suspension to remove ammonia from the zinc clay suspension and precipitate zinc oxide and/or zinc carbonate onto said cation-exchangeable clay in said zinc clay suspension;
- f) filtering the heated zinc clay suspension to isolate a zinc clay, wherein the isolated zinc clay includes (i) an amount of zinc ions that are insoluble in an aqueous solution of ammonia and carbon dioxide that exceeds the cation exchange capacity of the cation-exchangeable clay and (ii) excess zinc in the isolated zinc clay;
- and
- g) drying the isolated zinc clay.
6 more elements
A method for preparing a zinc organoclay, comprising:
- a) adding a slurry of a cation-exchangeable clay having a cation exchange capacity in a range of about 50 milliequivalents per 100 grams of clay to about 150 milliequivalents per 100 grams of clay and a zinc ammonia carbonate complex solution to form a zinc clay, wherein said cation-exchangeable clay is selected from the group consisting of bentonite clays, smectite clays, vermiculite clays, and mixtures thereof;
- b) agitating and then filtering the zinc clay suspension and removing zinc ions with an aqueous composition comprising ammonia and CO2 to isolate the zinc clay, wherein the isolated zinc clay includes an amount of zinc ions that are insoluble in an aqueous solution of ammonia and carbon dioxide that exceeds the cation exchange capacity of the cation-exchangeable clay;
- c) spraying said zinc clay with a solution of an ammonium salt having an organic group;
- and
- d) mixing and heating said zinc clay sprayed with said solution of an ammonium salt to form said zinc organoclay.
2 more elements
Dependencies are inferred from the claim text.