Inclusion-complexing agent for use in isolation of xylene isomer

Details Inclusion-complexing agent for use in isolation of xylene isomer Inclusion-complexing agent for use in isolation of xylene isomer

1991-04-10

1993-04-06

Nutter, Nathan M.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carbohydrates or derivatives

106208, 127 30, 127 31, C08B 3716, C13K 500

Patent

active

052005178

ABSTRACT:
A mixture of xylene isomers or a mixture of a xylene isomer(s) and ethylbenzene is brought into contact with at least one specific substituted .alpha.-cyclodextrin to form an inclusion complex(es) of the substituted .alpha.-cyclodextrin with a xylene isomer or ethylbenzene included therein, from which the xylene isomer(s) and/or ethylbenzene is then extracted to isolate, or separate, the same. Inclusion-complexing agents usable in isolation, or separation, of the xylene isomer(s) and/or ethylbenzene are substituted .alpha.-cyclodextrin in the form of .alpha.-cyclodextrin having the hydrogen atom of at least one hydroxyl group thereof substituted with at least one member selected from the group consisting of a glucosyl group, a maltosyl group, maltooligosaccharide residues, a hydroxyethyl group, a hydroxypropyl group, a methyl group, a sulfonic group, alkylenesulfonic groups, and carboxyalkyl groups.

REFERENCES:
patent: 3456028 (1969-07-01), Gerhold et al.
patent: 3465055 (1969-09-01), Gleim et al.
Jerry L. Atwood, "New Inclusion Methods for Separations Problems" 1984-85, Separation Science & Technology 19 (11, 12) pp. 751-759.
J. E. D. Davies, "Inclusion Compounds--Past, Present, and Future," 1983 Journal of Inclusion Phenomena 1, 3-44.

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