Mineral oils: processes and products – Fractionation – Liquid extraction with solvents
Patent
1987-06-16
1988-08-02
McFarlane, Anthony
Mineral oils: processes and products
Fractionation
Liquid extraction with solvents
208321, 208323, 208324, 208339, 585803, 585804, 585811, 585835, C10G 2116, C10G 2128
Patent
active
047612223
ABSTRACT:
A mixture of normally liquid organic compounds, particularly a light cycle oil obtained by the catalytic cracking of petroleum oils, is separated by contacting the mixture with an essentially anhydrous organic sulfoxide, particularly dimethylsulfoxide, to dissolve an organic extract in said sulfoxide and form an extract phase, comprising sulfoxide and the organic extract, and a raffinate phase, comprising the organic raffinate; diluting the extract phase with about 4.0 to 10.0 wt. % of water; separating the diluted extract phase into an aqueous phase, comprising the water containing the sulfoxide dissolved therein, and an organic phase, comprising the organic extract with minor amounts of the sulfoxide and water; fractionating the organic phase to separate the water and sulfoxide from the organic extract, which is suitable for use as a flotation agent; recycling the thus separated water and sulfoxide to the dilution step; drying the aqueous phase to remove the water and produce an essentially anhydrous sulfoxide; and recycling the sulfoxide to the solvent extraction step.
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Carter Cecil O.
Coombs Daniel M.
McFarlane Anthony
Phillips Petroleum Company
Wilson Michael E.
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