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US 9,675,905 B2Granted
Defoamer compositions and methods of using the same
AssigneeBuckman Laboratories International, Inc.
InventorGlenn Mudaly
Life of this patent
Estimating the term…
Abstract
Defoamer compositions are described and the use of defoamer compositions in paper and pulp mills is described, especially for use at the brown stock washing steps in a pulp mill. The defoamer composition comprises: a) about 20 wt % to about 90 wt % of at least one organophosphorous component (e.g., compound or polymer, n-tributoxyethyl phosphate); b) about 1 wt % to about 10 wt % of at least one silane treated silica; c) about 0.5 wt % to about 10 wt % of at least one surfactant that is anionic or non-ionic; and d) optionally, water or an aqueous liquid.
Claims17
A defoamer composition comprising:
- a) at least one organophosphorous component, wherein said organophosphorous component is n-tributyl phosphate, n-tributoxyethyl phosphate, tris(2-ethylhexyl)phosphate, triisooctyl phosphite, tri-isobutyl phosphate, tri-phenyl phosphate, or any combination thereof, wherein said organophosphorous component is present in an amount of from about 20 wt % to about 99 wt %, based on the total weight of said defoamer composition;
- b) at least one silane treated silica, wherein said silane treated silica is present in an amount of from about 1 wt % to about 10 wt %, based on the total weight of said defoamer composition;
- c) at least one surfactant that is anionic or non-ionic, wherein said surfactant is a polyglycol ester, a sugar ester, a block copolymer ester of polyoxypropylene and polyoxyethylene, an alcohol ethoxylate, a polyalkylene glycol ester, a sorbitan ester, an amine ethoxylate, an ester ethoxylate, an alkylolamide ethoxylate, a lanolin ethoxylate, or an alkylphenol ethoxylate, a sulphosuccinate, an ether sulphate, an alcohol sulphate, an alkylaryl sulphonate, an alkane/olefin sulphonate, or a petroleum sulphonate, or any combination thereof, wherein said surfactant is present in an amount of from about 0.5 wt % to about 10 wt %, based on the total weight of said defoamer composition;
- and
- d) optionally, water.
2 more elements
Dependencies are inferred from the claim text.