Separation of 1,2,4-trimethylbenzene from 1,2,3-trimethylbenzene

Details Separation of 1,2,4-trimethylbenzene from 1,2,3-trimethylbenzene Separation of 1,2,4-trimethylbenzene from 1,2,3-trimethylbenzene

1996-12-23

1999-10-26

Manoharan, Virginia

Distillation: processes, separatory

Adding material to distilland except water or steam per se

Organic compound

203 58, 203 60, 203 62, 203 64, 203 65, 585807, 585808, 585860, 585864, 585865, B01D 340, C07C 708

Patent

active

059721723

ABSTRACT:
1,2,4-Trimethylbenzene is difficult to separate from 1,2,3-trimethylbenzene by conventional distillation or rectification because of the proximity of their boiling points. 1,2,4-trimethylbenzene can be readily separated from 1,2,3-trimethylbenzene by extractive distillation. Effective agents are 3-nitrotoluene, m-cresol and sulfolane.

REFERENCES:
patent: 3987120 (1976-10-01), Hosler
patent: 4021311 (1977-05-01), Becker
patent: 4371428 (1983-02-01), Montagna et al.
patent: 4596655 (1986-06-01), Van Eijl
patent: 4615771 (1986-10-01), Zimmerman et al.
patent: 5032232 (1991-07-01), Lee et al.
patent: 5135620 (1992-08-01), Brown
patent: 5720857 (1998-02-01), Berg

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