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US 7,001,534 B2Granted
Alum pellets
AssigneeHalliburton Energy Services, Inc.
InventorsCharles R. Landis, Danny Oaks, Ricky P. Rothermel, Robert A. Harvey, Steven Reed Gray
Life of this patent
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Abstract
Compositions including pellets of alum, a smectite mineral material, and optionally sodium or calcium carbonate, that can be delivered to a phosphate impoundment located at or near the bottom of a body of water. The pellets of alum, smectite mineral material and optionally sodium or calcium carbonate are dropped in a body of water, and the alum is released over time, as the pellet descends to the bottom of the body of water.
Claims29
A composition for treating phosphate in a body of water comprising:
- a) alum;
- and
- b) a smectite mineral material;
- which composition, when added to a body of water, retains at least about 90 percent of the integrity of its form for at least about two minutes;
- and
- which composition has a density sufficient to allow the composition to settle to a sediment water interface in the body of water and release alum at the sediment water interface.
3 more elements
A composition comprising:
- a) alum;
- and
- b) a smectite mineral material;
- which composition is in a form selected from a tablet, extruded noodle, pellet, briquette and ribbon;
- which composition, when added to a body of water, retains at least about 90 percent of the integrity of the selected form for at least about two minutes;
- and
- which composition has a density sufficient to allow the composition to settle to a sediment water interface in the body of water and release alum at the sediment water interface.
4 more elements
A composition comprising
- a) alum, in an amount of from about 30 to about 99 percent by weight;
- b) a smectite mineral material, in an amount of from about 1 to about 70 percent by weight;
- and
- having a moisture content of from about 1 to about 15 percent by weight,
- which composition, when added to a body of water, retains at least about 90 percent of the integrity of the selected form for at least about two minutes;
- and
- which composition has a density sufficient to allow the composition to settle to sediment water interface in the body of water and release alum at the sediment water interface.
4 more elements
Dependencies are inferred from the claim text.