Process for separating isomers of disubstituted benzenes and age

Details Process for separating isomers of disubstituted benzenes and age Process for separating isomers of disubstituted benzenes and age

1991-05-22

1993-01-05

McFarlane, Anthony

Chemistry of hydrocarbon compounds

Purification, separation, or recovery

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

585833, 585865, 564424, 570190, 570211, C07C 700, C07C20900, C07C 1700

Patent

active

051773023

ABSTRACT:
This invention is concerned with a process for separating isomers of disubstituted benzenes, wherein a mixture of isomers of disubstituted benzenes is contacted with a substituted cyclodextrin to form inclusion complexes, and desired isomers are recovered therefrom in a highly selective manner. The invention also provides substituted cyclodextrins suited for use in the process. Substituted cyclodextrins used in the process can be recovered and used repeatedly.

REFERENCES:
patent: 3456028 (1969-07-01), Gerhold et al.
patent: 5095173 (1992-03-01), Uemasu et al.
Staerke, vol. 39, No. 10, Oct. 1987, Weinheim De, pp. 357-362; J. Szejtli: "Application of cyclodextrins in the chromatography", p. 358, paragraph 2.1, Germany.
Patent Abstracts of Japan, vol. 12, No. 426 (C-542) (3273) Nov. 10, 1988 of JP-A-63 154 703 (Nikken Kagaku), Jun. 28, 1988, Japan.

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