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

1987-06-15

1989-04-18

Caldarola, Glenn

Chemistry of hydrocarbon compounds

Purification, separation, or recovery

By plural serial diverse separations

208313, 585807, 585856, 203 58, 203 57, C07C 2984, B01D 340

Patent

active

048229474

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 dimethylsulfoxide or a mixture of it with certain high boiling organic compounds. Typical examples of effective agents are: dimethylsulfoxide; dimethylsulfoxide and 1,4-butanediol; dimethylsulfoxide, nitrobenzene and diethylene glycol.

REFERENCES:
patent: 4488937 (1984-12-01), Berg et al.

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