Demulsification of bitumen emulsions using polyureas

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

1981-12-02

1983-05-24

Gantz, Delbert E.

Mineral oils: processes and products

Refining

Water removal

252358, 210708, 210735, C10G 3304, C30B 300, C09K 300

Patent

active

043849512

ABSTRACT:
A process for recovering bitumen from oil-in-water (O/W) emulsions is disclosed wherein water soluble demulsifiers are used. These demulsifiers are polyureas of average molecular weight greater than about 5,000 prepared by the reaction between a polyisocyanate and a polyoxyalkylenediamine. 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.

REFERENCES:
patent: 3594393 (1971-07-01), Buriks
patent: 3640894 (1972-02-01), Sampson
patent: 4016101 (1977-04-01), Markofsky
patent: 4029708 (1977-06-01), Seitz et al.
patent: 4321148 (1982-03-01), McCoy et al.

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