Demulsification of bitumen emulsions

Details Demulsification of bitumen emulsions Demulsification of bitumen emulsions

1980-05-22

1982-03-23

Wyse, Thomas G.

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

208 11R, 208188, 252341, 252331, B01D 1704, C10G 100

Patent

active

043211488

ABSTRACT:
A process for recovering bitumen from oil-in-water (O/W) emulsions is disclosed wherein water soluble demulsifiers are used. These demulsifiers are hydrophilic polyurethanes wherein the ethylene oxide content of the polyol portion of the polyurethane is greater than about 70% by weight. To resolve the bituminous petroleum emulsions, the process is carried out between 25.degree. and 120.degree. C. wherein the demulsifier of the invention is contacted with the bituminous emulsion.

REFERENCES:
patent: 2964478 (1960-12-01), Monson
patent: 3296117 (1967-01-01), Ross et al.
patent: 3594393 (1971-07-01), Buriks et al.
patent: 4058453 (1977-11-01), Patel et al.

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