Separation of m-xylene from o-xylene by extractive distillation

Details Separation of m-xylene from o-xylene by extractive distillation Separation of m-xylene from o-xylene by extractive distillation

1990-02-07

1991-05-28

Bascomb, Jr., Wilbur

Distillation: processes, separatory

Adding material to distilland except water or steam per se

At least two materials

203 56, 203 60, 203 64, 585866, B01D 340, C07C 708

Patent

active

050192175

ABSTRACT:
m-Xylene is difficult to separate from o-xylene by conventional distillation or rectification because of the close proximity of their boiling points. m-Xylene can be readily separated from o-xylene by using extractive distillation in which the extractive agent is a higher boiling ester. Typical examples of effective agents are diisononyl adipate, glycerol triacetate and dimethyl phthalate.

REFERENCES:
patent: 4488937 (1984-12-01), Berg et al.
patent: 4585526 (1986-04-01), Berg et al.
patent: 4673465 (1987-06-01), Berg et al.
patent: 4676872 (1987-06-01), Berg et al.
patent: 4676875 (1987-06-01), Berg et al.
patent: 4738755 (1988-04-01), Berg et al.

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