Liquid defoamer and defoaming process
AssigneeDrew Chemical Corporation
InventorFrancis J. Boylan
Life of this patent
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Abstract
A free flowing aqueous defoamer comprised of a solid alcohol, a solid fatty acid, a soap of a solid fatty acid and an anionic and/or non-ionic surfactant which prevents formation of a gelled mass of the solids and provides a free flowing dispersion of the solids in the water, with the solids contents being at least 5%, preferably at least 20%, all by weight, and with such solids having been treated to provide hydrophobic surfaces. A water soluble salt of a metal having a valence of greater than 1, such as aluminum, iron, magnesium, or calcium may be added to the composition to provide hydrophobic particle surfaces.
Claims28
A pumpable free flowing aqueous defoaming composition which can be stored in a ready to use form, comprising:
- (a) water;
- (b) at least one solid alcohol having from 14 to 28 carbon atoms;
- (c) at least one solid fatty acid;
- (d) at least one soap of a solid fatty acid, said components (b), (c) and (d) being present in the water in an effective defoaming amount and to provide a dispersed solids content in the water of at least 5%;
- (e) a surfactant comprised of at least one member selected from the group consisting of non-ionic surfactants and anionic surfactants selected from the group consisting of:
- alcohol sulfates
- alkaryl sulfonates
- ethoxylated alcohol sulfates
- sulfates and sulfonates of ethoxylated alkyl phenols
- sulfates of fatty esters
- sulfates and sulfonates of alkyl phenols
- sulfonates of condensed naphthalenes
- sulfonates of naphthalene
- sodium derivatives of sulfo-succinates
- alkali salts of petroleum sulfonates
- alkali phosphate esters
- sulfonated alkyl esters
- sodium polymeric carboxylic acid
- which surfactant prevents formation of a gelled mass of the solids to provide a pumpable free flowing dispersion of the solids in the water, said dispersed solids having been treated with at least one water soluble salt selected from the group consisting of calcium, iron, magnesium, barium and aluminum salts to provide hydrophobic surfaces.
Dependencies are inferred from the claim text.