De-asphalting heavy crude oil and heavy crude oil/water emulsion

Details De-asphalting heavy crude oil and heavy crude oil/water emulsion De-asphalting heavy crude oil and heavy crude oil/water emulsion

1984-10-22

1987-01-06

Metz, Andrew H.

Mineral oils: processes and products

Fractionation

Deasphalting

208188, 208187, 210708, 210729, C10G 3300, C10G 3304, B01D 2101

Patent

active

046345205

ABSTRACT:
A process for the simultaneous de-emulsification and de-asphalting of heavy oil/water emulsions containing asphaltics enables de-asphalted oil, asphaltics and emulsion water to be separately recovered. A heavy oil/water emulsion is mixed with a solvent to cause the emulsion to be broken with consequent dissolution of oil by the solvent and coalescence of emulsion water and asphaltics as fast settling particles, the solvent comprising a light C.sub.4 to C.sub.7 paraffinic composition and the weight of solvent being from about 2 to about 5 times the weight of heavy oil. The water/asphaltic particles are separated from the bulk of the oil/solvent phase and are fed into a water bath to produce relatively large stable asphaltic agglomerates with exclusion of emulsion water. The asphaltic agglomerates are removed from the hot water bath, and de-asphalted oil is recovered from the oil/solvent phase. Heavy oil containing asphaltics can also be treated by the process, with the separated asphaltics agglomerating in the hot water bath.

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