Polyorganosiloxane demulsifier compositions and methods of making same
AssigneeMomentive Performance Material Inc.
InventorsAnubhav Saxena, Monjit Phukan, Senthilkumar U., Ian Procter, Sigfredo Gonzalez, Kalman Koczo, Sabine Azouani, Vikram Kumar
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Abstract
The invention relates to a method for separating emulsions of oil and water, the method comprising incorporating a demulsifying-effective amount of a polyorganosiloxane demulsifier into an emulsion comprising an oil phase and an aqueous phase. The invention also relates to compositions containing polyorganosiloxane demulsifier and the water and oil phases of an emulsion.
Claims27
A method for separating emulsions of oil and water, the method comprising incorporating a demulsifying-effective amount of at least one polyorganosiloxane demulsifier into an emulsion comprising an oil phase and an aqueous phase, the polyorganosiloxane demulsifier having a molecular structure comprising a polysiloxane backbone of at least two siloxane units covalently bound to (i) one or more pendant alkylene oxide groups comprising one or more alkylene oxide units independently having 1 to 6 carbon atoms, and (ii) one or more pendant groups having the formula (CrH2r)B wherein r equals 0 to 30 and B is an aryl radical;
- and (iii) one or more pendant alkyl groups having at least 4 and up to 40 carbon atoms.
A composition comprising:
- a) a demulsifying-effective amount of at least one polyorganosiloxane demulsifier having a molecular structure comprising a polysiloxane backbone of at least two siloxane units covalently bound to (i) one or more pendant alkylene oxide groups comprising one or more alkylene oxide units independently having 1 to 6 carbon atoms, (ii) one or more pendant groups having the formula (CrH2r)B wherein r equals 0 to 30 and B is an aryl radical;
- and (iii) one or more pendant alkyl groups having at least 4 and up to 40 carbon atoms;
- b) an aqueous phase;
- and
- c) an oil phase.
Dependencies are inferred from the claim text.