Mineral oils: processes and products – Refining – Metal contaminant removal
Patent
1986-12-29
1988-05-31
Sneed, Helen M. S.
Mineral oils: processes and products
Refining
Metal contaminant removal
208309, 208 45, 196 1452, C10G 2102, C10G 2100
Patent
active
047479361
ABSTRACT:
An improved method for deasphalting and demetallizing heavy oils, where the improvement is a counterflow washing step which increases the yield of the product oil. A heavy oil feedstream is contacted in a countercurrent manner with a solvent in a multi-stage extraction zone and a resulting light phase stream is heated and passed into a settling zone. A second light phase stream comprised of the product deasphalted and demetallized oil and solvent is separated from a contaminant-laden heavy phase in the settling zone. The contaminant-laden heavy phase, which is termed a resin phase, contains an equilibrium amount of DMO and solvent. DMO-enriched solvent is displaced from the resin stream by means of a counterflow washing process using pure solvent.
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Cordovano Richard J.
McBride Thomas K.
Myers Helane
Sneed Helen M. S.
Spears Jr. John F.
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