Demulsification of bitumen emulsions using polyureas

Details Demulsification of bitumen emulsions using polyureas Demulsification of bitumen emulsions using polyureas

C - Chemistry, Metallurgy

10

C

196/40

C10C 3/02 (2006.01) C10G 33/04 (2006.01)

Patent

CA 1205767

DEMULSIFICATION OF BITUMEN EMULSIONS USING POLYUREAS ABSTRACT OF THE DISCLOSURE A process for recovering bitumen from oil-in-wa-ter (O/W) emulsions is disclosed wherein water soluble demulsi- fiers are used. These demulsifiers are polyureas of average molecular weight greater than about 5,000 prepared by the reaction between a polyisocyanate and a polyoxyalkylenedi- amine. To resolve the bituminous petroleum emulsions, the process is carried out between 25 and 160°C wherein the de- mulsifier of the invention is contacted with the bituminous emulsion. -I-

424527

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