Process for the separation of isomeric dichlorotoluenes
US5126498A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 9, 1990 |
| Grant date | Jun 30, 1992 |
| Priority date | — |
| Expiry date | Nov 9, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C17/389
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The process for the separation of isomeric dichlorotoluenes, comprising the steps of: PA1 (a) passing a mixture containing isomeric dichlorotoluenes over a zeolite of the ZSM5 type having the composition (expressed in molar ratios) of (0.9+0.2) M.sub.2/n O:Al.sub.2 O.sub.3 : (10-100) SiO.sub.2 : z H.sub.2 O in which M is at least one cation selected from H, an alkali metal, an alkaline earth metal or a tetraalkylammonium cation; n is the valency of M; and z is between 0 and 40: PA1 (b) separating the non-adsorbed dichlorotoluenes; PA1 (c) contacting the zeolite containing the adsorbed isomers with an eluent; and PA1 (d) separating the isomers from the eluent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.