Method for selective isolation of Dichlorobenzene
US4873383A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 29, 1988 |
| Grant date | Oct 10, 1989 |
| Priority date | — |
| Expiry date | Jan 29, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C17/389
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A selective isolation of m-dichlorobenzene is carried out at a high efficiency by bringing an isomeric mixture containing m- and o- and/or p-dichlorobenzenes into contact with an absorbing material comprising a TPZ-3 type zeolite consisting of at least one aluminosilicate compound of the formula (I): EQU M.sub.2/n O.multidot.Al.sub.2 O.sub.3 .multidot..sub.x SiO.sub.2 .multidot..sub.m H.sub.2 O (I) wherein M = a mono or di-valent cation, for example, H.sup.+, Li.sup.+ or Na.sup.+, n=1 or 2, x=10 or more, and m=0 or 1 or more, to selectively absorb dichlorobenzene by the absorbing material, and then, by collecting the non-absorbed fraction of the isomeric mixture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.