Separation of xylenes by extractive distillation

Details Separation of xylenes by extractive distillation Separation of xylenes by extractive distillation

1994-05-23

1995-08-15

Bascomb, Jr., Wilbur

Distillation: processes, separatory

Adding material to distilland except water or steam per se

At least two materials

203 56, 203 57, 203 60, 203 63, 203 65, 203 67, 585808, 585860, 585864, 585866, B01D 340, C07C 708

Patent

active

054416086

ABSTRACT:
p-Xylene cannot be separated from m-xylene by distillation or rectification because of the proximity of their boiling points. p-Xylene can be separated from m-xylene by means of extractive distillation. Effective agents are 3-ethylphenol and 1,1,2-trichloroethane. Effective agents for separating mixtures of p-xylene, m-xylene and o-xylene are 2-butoxyethyl acetate and 1,1,1-trichloroethane.

REFERENCES:
patent: 2494274 (1950-01-01), Woerner
patent: 2721170 (1955-10-01), Johnson
patent: 4673465 (1987-06-01), Berg et al.
patent: 5039380 (1991-08-01), Berg
patent: 5091059 (1992-02-01), Berg
patent: 5094723 (1992-03-01), Berg
patent: 5094725 (1992-03-01), Berg

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