Separation of o-xylene from p-xylene and m-xylene by extractive

Details Separation of o-xylene from p-xylene and m-xylene by extractive Separation of o-xylene from p-xylene and m-xylene by extractive

1995-05-31

1997-02-11

Straub, Gary P.

Chemistry of hydrocarbon compounds

Purification, separation, or recovery

By addition of extraneous agent, e.g., solvent, etc.

203 57, 203 60, 203 63, 203 64, 203 65, 585833, B01D 340, C07C 708

Patent

active

056022948

ABSTRACT:
o-Xylene cannot be separated from p-xylene and m-xylene by conventional distillation or rectification because of the proximity of their boiling points. o-Xylene can be readily separated from mixtures of p-xylene and m-xylene by extractive distillation. Effective agents are o-cresol, dichloroacetic acid, methyl salicylate and 1-tetradecanol.

REFERENCES:
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patent: 4822947 (1989-04-01), Berg et al.
patent: 5094723 (1992-03-01), Berg
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patent: 5445715 (1995-08-01), Berg
patent: 5453167 (1995-09-01), Berg
patent: 5466345 (1995-11-01), Berg

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