Process for extracting 2,5-dichlorotoluene from isomer mixtures with sodium-L zeolite adsorbents
US4922040A · kind A · utility
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16Claims
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Key dates
| Filing date | Dec 28, 1988 |
| Grant date | May 1, 1990 |
| Priority date | — |
| Expiry date | Dec 28, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C17/389
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for separating the isomers of dichlorotoluene from a feed mixture of the same. Separation of the isomers is effected by selective adsorption and desorption and is susceptible to various flow schemes for performing continuous adsorptive separations. The process uses an L-type adsorbent having alkali metal cations, or mixtures thereof as cations and a desorbent containing 1,2-dichlorobenzene or chlorobenzene alone or either admixed with saturated aliphatic hydrocarbons having less than 9 carbon atoms.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.