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US 5,843,336 AGranted
Silicate defoaming composition and methods
AssigneeJ.M. Huber Corporation
InventorAlvin E. Steelman
Life of this patent
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Abstract
Defoaming formulations for aqueous systems are produced by treating silicates such as sodium magnesium aluminosilicates with a source of aluminum to provide an aluminum content therein in the range of 0.1 to 2.5 wt. %, preferable 0.3 to 1.2 wt. %, and forming a defoaming formulation from said aluminum treated silicate by hydrophobizing with a silicone fluid, and dispersing in oil and/or water to form a defoamer formulation.
Claims9
A method for defoaming aqueous compositions subject to foaming which comprises adding thereto to a defoamer composition comprising:
- a) a hydrophobized aluminum treated silicate prepared by treating silicate particles with aluminum sulfate in an amount sufficient to provide an aluminum treatment level about 0.3-1.2 wt. % based on the silicate, and
- b) a defoaming carrier.
Dependencies are inferred from the claim text.