Extractive distillation

Distillation: processes – separatory – Adding material to distilland except water or steam per se – At least two materials

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203 54, 203 55, 203 56, 203 58, 203 62, 203 64, 203 65, 203 66, 208358, 260674A, 260674N, 260676R, 260677A, 2606815R, B01D 334

Patent

active

040533697

ABSTRACT:
In a process of extractive distillation, the combination of operating with two liquid phases in at least the uppermost trays of the column, preferably while maintaining the column operation at substantially an optimum reflux ratio, results in increased efficiencies and minimum requirements for selective solvent.

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Sherwood & Pigford, "Absorption & Extraction", Chem. Engr. Series, 2nd. Ed., pp. 399-403, McGraw-Hill, 1952.
"Chem. Engr's Hndbk", Perry, 3rd Ed., 1950, McGraw-Hill, 1950, pp. 639-651.
"Chem Engr's Hndbk", Perry, 4th Ed., McGraw-Hill, pp. 14-40 to 14-43.

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