Process for separating isomeric dichlorotoluenes by adsorption
US4766262A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 3, 1986 |
| Grant date | Aug 23, 1988 |
| Priority date | — |
| Expiry date | Nov 3, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C17/389
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for separating dichlorotoluene isomers from a mixture containing at least two dichlorotoluene isomers comprising PA0 (a) passing said mixture containing dichlorotoluene isomers through a mordenite having the following composition; in molar ratios: PA1 a H.sub.2 O: b M.sub.2/n O: Al.sub.2 O.sub.3 : (10-400 SiO.sub.2) PA0 in which M is hydrogen or at least one cation selected from an alkali metal or an alkaline-earth metal with the exception of cesium and rubidium, n is the valence of M, 0.7.ltoreq.a+b.ltoreq.1.1, and 0.ltoreq.b.ltoreq.0.2, PA0 (b) separating the non-adsorbed dichlorotoluenes from said mordenite, PA0 (c) contacting said mordenite containing the adsorbed isomers with a desorbent capable of separating said isomers from said mordenite, and PA0 (d) separating the desorbed isomers from the desorbent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.