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

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

C - Chemistry, Metallurgy

10

G

196/246

C10G 33/00 (2006.01) C10G 21/00 (2006.01) C10G 33/04 (2006.01)

Patent

CA 1239371

ABSTRACT OF THE DISCLOSURE A process for the simultaneous de-emulsifica- tion and de-asphalting of heavy oil/water emulsions containing asphaltics enables de-asphalted oil, asphal- tics 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 com- prising a light C4 to C7 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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