Process for treating refinery slurries

Details Process for treating refinery slurries Process for treating refinery slurries

C - Chemistry, Metallurgy

10

G

C10G 33/04 (2006.01) B01D 11/02 (2006.01) B01D 17/00 (2006.01)

Patent

CA 2052655

CASE 3322 "PROCESS FOR TREATING REFINERY SLURRIES" Abstract A refinery slurry containing water, oil and a solid fraction, is brought into contact with carbon dioxide gas in order to adjust the pH value of said slurry at an acidic value and, in that way, improve the separation, by mechanical means, of a first water phase and a first oil phase, from a sludge. The latter is submitted to an extraction with carbon dioxide, under suparcritic conditions, in order to separate a second water phase and a second oil phase from a residual sludge, which is disposed of. The process makes it possible most water, and, in particular, most oil contained in said slurry to be removed and a sludge to be disposed of, which shows a reduced propensity to the elution of the residual oil.

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