Separation of ethylbenzene from para- and meta-xylenes by extrac

Details Separation of ethylbenzene from para- and meta-xylenes by extrac Separation of ethylbenzene from para- and meta-xylenes by extrac

1981-02-23

1981-11-10

Bascomb, Jr., Wilbur L.

Distillation: processes, separatory

Adding material to distilland except water or steam per se

At least two materials

203 56, 203 63, 203 65, 203 67, 585805, 585864, B01D 340, C07C 700

Patent

active

042996686

ABSTRACT:
Ethylbenzene and para-xylene and/or meta-xylene are difficult to separate by distillation because they boil only 2.3 C..degree. and 3.1 C..degree. apart. Ethylbenzene can be readily separated from the xylenes by using extractive distillation in which the extractive distillation agent is a mixture of pentachlorophenol admixed with certain chlorinated and/or oxygenated organic compounds boiling higher than the xylenes. A typical mixture comprises pentachlorophenol, benzene hexachloride and 1,2,4-trichlorobenzene.

REFERENCES:
patent: 2532031 (1950-11-01), Nixon et al.
patent: 2567228 (1951-09-01), Morrell et al.
patent: 2721170 (1955-10-01), Johnson
patent: 2799629 (1957-07-01), Clough et al.
patent: 3105017 (1963-09-01), Amir et al.
patent: 3356593 (1967-12-01), Suzuki et al.

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