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US 4,382,853 AGranted
Demulsification of bitumen emulsions using combinations of chemical agents
AssigneeTexaco Inc.
InventorDavid R. McCoy
Life of this patent
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Abstract
A process for recovering bitumen from oil-in-water (O/W) emulsions is disclosed wherein water soluble demulsifiers are used. These demulsifiers are combinations of chemical agents comprising (a) poly(amidoamine) or poly(ester-amine) salts, and (b) polycarbonates. To resolve the bituminous petroleum emulsions, the process is carried out between 25.degree. and 160.degree. C. wherein the demulsifier of the invention is contacted with the bituminous emulsion.
Claims8
A process for recovering petroleum from O/W bitumen emulsions by demulsifying said emulsions by adding thereto a combination of chemical agents comprising
- (a) Salts of polymers and/or co-polymers of cationic monomers having the general structure ##STR4## where R=H or lower alkyl, X=NH or O, n>1, and R.sub.1 and R.sub.2 are hydrogen or alkyl and wherein the polymers or co-polymers have a molecular weight greater than about 2,000 and
- (b) polycarbonates.
Dependencies are inferred from the claim text.