Cleaning pipeline interior with gelled pig
AssigneeThe Dow Chemical Company
InventorRobert J. Purinton, Jr.
Life of this patent
Estimating the term…
Abstract
Organic gels comprising (a) a nonpolar, liquid, organic solvent and (b) a gelling amount of a mixture of (1) an alkyl oleyl phosphate and (2) an alkali metal aluminate. The gels have many uses, one of which is as a gelled pig for pipeline cleaning.
Claims18
A method of cleaning the interior of a pipeline comprising passing through said pipeline a gelled pig which comprises (a) a nonpolar, liquid, organic solvent, and (b) a gelling amount of a gelling agent mixture of (1) a phosphate ester component which is composed predominantly of an alkyl oleyl phosphate and (2) an alkali metal aluminate.
A method of cleaning the interior of a pipeline comprising passing through said pipeline a gelled pig which comprises (a) a nonpolar, liquid, organic solvent, and (b) a gelling amount of a gelling agent mixture of (1) an alkali metal aluminate and (2) an alkyl oleyl phosphate prepared by first reacting a substantially equal molar mixture of a trialkyl phosphate and phosphorous pentoxide and thereafter reacting the resulting reaction product with oleyl alcohol.
Dependencies are inferred from the claim text.