Phosphoric ester demulsifier composition
A phosphoric ester demulsifier composition prepared by reacting one or more alkylphenol-formaldehyde resin alkoxylates or one or more polyalkylene glycols, or a mixture thereof, with about 0.001 to about 1.0 molar equivalents of one or more phosphorous compounds selected from phosphorous oxychloride, phosphorous pentoxide and phosphoric acid and a method of using the demulsifier composition to resolve water-in-oil emulsions.
1. A phosphoric ester demulsifier comprising the reaction products of one or more polyalkylene glycols and about 0.001 to about 1.0 molar equivalents of one or more phosphorous compounds selected from phosphorous oxychloride, phosphorous pentoxide and phosphoric acid wherein the polyalkylene glycols are selected from the group consisting of reaction products of C 4 –C 12 , glycols with at least one of ethylene oxide and propylene oxide wherein the polyalkylene glycol is cross-linked by reaction with a cross linking agent having at least two functionalities capable of reacting with hydroxyl groups.
2. The demulsifier of claim 1 wherein the cross linking agent is bisphenol A epichlorohydrin.
3. A phosphoric ester demulsifier prepared by reacting a mixture of one or more alkylphenol-formaldehyde resin alkoxylates and one or more polyalkylene glycols with about 0.001 to about 1.0 molar equivalents of one or more phosphorous compounds selected from phosphorous oxychloride, phosphorous pentoxide and phosphoric acid.
4. The demulsifier of claim 3 wherein the alkylphenol-formaldehyde resin alkoxylate is selected from the group consisting of nonylphenol-formaldehyde resin alkoxylate, butylphenol-formaldehyde resin alkoxylate and amylphenol-formaldehyde resin alkoxylate, or a mixture thereof and the polyalkylene glycol is selected from the group consisting of C 4-12 glycol base polyethylene glycols, C 4-12 glycol base polypropylene glycols, C 4-12 glycol base polyethylene/polypropylene block copolymers, C 4-12 glycol base polyethylene/polypropylene mixed copolymers and C 4-12 glycol base cross-linked polyalkylene glycols.
5. The demulsifier of claim 3 wherein the polyalkylene glycol and alkylphenol-formaldehyde resin alkoxylate are cross-linked by reaction with a cross linking agent having at least two functionalities capable of reacting with hydroxyl groups.
6. The demulsifier of claim 5 wherein the cross linking agent is bisphenol A epichlorohydrin.
7. The demulsifier of claim 3 wherein the phosphoric compound is phosphorous oxychloride.
8. The demulsifier of claim 3 prepared by reacting a mixture of one or more alkylphenol-formaldehyde resin alkoxylates and one or more polyalkylene glycols with about 0.01 to about 0.5 molar equivalents of phosphorous oxychloride.
9. The demulsifier of claim 8 wherein the alkylphenol-formaldehyde resin alkoxylate is nonylphenol-formaldehyde resin alkoxylate.
10. A method of preparing a phosphoric ester demulsifier comprising reacting a mixture of one or more alkylphenol-formaldehyde resin alkoxylates and one or more polyalkylene glycols with about 0.001 to about 1.0 molar equivalents of one or more phosphorous compounds selected from phosphorous oxychloride, phosphorous pentoxide and phosphoric acid.
11. A demulsifier composition comprising one or more phosphoric ester demulsifiers according to claim 3 .