Liquid composition for purification of oil
AssigneeSkf Recondoil AB
InventorsThomas Persson, Tomas Östberg, Fred Sundström
Life of this patent
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Abstract
A liquid composition for use in purifying an oil contains a polar polymer, a surface active hydrotrope/solubilizer, and a co-tenside. The polar polymer may be a polyalkylene glycol, such as polyethylene glycol. The hydrotrope/solubilizer may be an anionic sulfonic acid, a phosphate ester-based substance or a non-ionic surfactant from the poly-glycoside family. The co-tenside may be at least one amphoteric co-surfactant, such as sodium caprylimino dipropionate.
Claims20
A method for purifying a contaminated oil, comprising:
- mixing a liquid composition that is at least substantially insoluble in oil with the contaminated oil to form a two-phase mixture containing an oil phase and a polar phase, whereby the polar phase absorbs contaminating solids and/or dissolved impurities in the contaminated oil, and
- separating the oil phase of the two-phase mixture from the polar phase;
- wherein the liquid composition comprises a polar polymer, a surface active hydrotrope/solubilizer, and a co-tenside.
A liquid composition comprising a polar polymer, a surface active hydrotrope/solubilizer, and sodium caprylimino dipropionate.
A method for purifying a contaminated oil, comprising:
- mixing a liquid composition with the contaminated oil to form a two-phase mixture containing an oil phase and a polar phase, and
- filtering the two-phase mixture such that the oil phase passes through a filter and the polar phase and contaminants are retained in the filter;
- wherein the liquid composition comprises a polar polymer, a surface active hydrotrope/solubilizer, and a co-tenside.
Dependencies are inferred from the claim text.