Alkali recycle process for recovery of heavy oils and bitumens

Details Alkali recycle process for recovery of heavy oils and bitumens Alkali recycle process for recovery of heavy oils and bitumens

1980-06-09

1983-07-12

Warren, Charles F.

Mineral oils: processes and products

Refining

Water removal

210708, C10G 3304

Patent

active

043929443

ABSTRACT:
Heavy oils, including oil sands, are recovered from mined or in-situ formation by a novel procedure which involves an initial emulsification of the oil with aqueous alkali, usually sodium hydroxide solution, at a pH above about 11. After separation of any residual solid phase, such as sand, the resulting oil-in-water emulsion is inverted by the use of slaked lime to form a water-in-oil emulsion and thereby regenerating part of the sodium hydroxide solution. The water-in-oil emulsion is dewatered to recover the oil phase while the aqueous phase is recycled to the initial emulsification, after removal of clay particles when oil sands are treated.

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