Mineral oils: processes and products – Fractionation – Liquid extraction with solvents
Patent
1990-08-03
1993-07-06
Morris, Theodore
Mineral oils: processes and products
Fractionation
Liquid extraction with solvents
208321, 208322, 208333, 208334, B01D 340
Patent
active
052250725
ABSTRACT:
Processes are disclosed for the separation of aromatic hydrocarbons from feedstreams containing mixtures of aromatic and non-aromatic hydrocarbons using extractive distillation with an aromatic selective solvent in order to separate the aromatic hydrocarbons from the non-aromatic hydrocarbons. A rich solvent stream comprising the aromatic hydrocarbons and solvent is withdrawn from the extractive distillation column and passed to a steam stripping column to provide a regenerated lean solvent stream, a side-cut stream comprising the aromatic hydrocarbons and a stripper overhead stream comprising non-aromatic hydrocarbons which are passed as a reflux stream to the extractive distillation column. Various solvents are disclosed and an especially preferred solvent is sulfolane.
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Diemler William C.
McBride Thomas K.
Morris Theodore
Silverman Richard P.
Tolomei John G.
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