SILOXANE CROSS-LINKED DEMULSIFIERS

摘要

A composition comprising one or more siloxane cross-linked demulsifiers wherein said siloxane cross-linked demulsifiers are prepared by reacting one or more alkylphenol-formaldehyde resin alkoxylates, one or more polyalkylene glycols, or a mixture thereof, with up to about 1.0 molar equivalents of one or more silicon-based cross-linkers of formula R₁R₂R₃R₄Si wherein R₁, R₂, R₃, R₅, R₆ and R₇ are independently selected from H, Cl, C₁-C₄ alkyl and C₁-C₄ alkoxy; R₄.is selected from H, Cl, C₁-C₄ alkyl, C₁-C₄ alkoxy and a group of formula L₁SiR₅R₆R₇; L₁ is absent or is selected from -O-, arylene and C₁-C₁₂ alkylene, optionally interrupted by one or more -O- or -N(R₈); and R₈ is H or C₁-C₄ alkyl and a method of using the demulsifier composition to resolve water-in-oil emulsions.