Process for extracting meta-dichlorobenzene from isomer mixtures with mixed alkali metal exchanged X zeolite adsorbents
US4996380A · kind A · utility
4Cited by
8References
6Claims
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Key dates
| Filing date | Nov 8, 1989 |
| Grant date | Feb 26, 1991 |
| Priority date | — |
| Expiry date | Nov 8, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C17/389
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for separating the isomers of dichlorobenzene from a feed mixture of the same. Separation of the isomers is effected by selective absorption and desorption and is susceptible to various flow schemes for performing continuous adsorptive separations. The process uses an X-type zeolite adsorbent having a mixture of sodium and potassium ions in the exchangeable cationic sites. The desorbent may be an alkyl benzene, such as toluene, xylene, p-diethylbenzene, etc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.