Process for isolating xylene isomer(s) and/or ethylbenzene and inclusion-complexing agent for use in isolation of xylene isomer(s) and/or ethylbenzene
US5095173A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Sep 17, 1990 |
| Grant date | Mar 10, 1992 |
| Priority date | — |
| Expiry date | Sep 17, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C7/152
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
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 substitited .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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.