Separation of ethyltoluene isomers
US4996388A · kind A · utility
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Key dates
| Filing date | Jul 26, 1990 |
| Grant date | Feb 26, 1991 |
| Priority date | — |
| Expiry date | Jul 26, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C7/13
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process of separating the ortho, meta and para isomers of ethyltoluene. One aspect employs a ferrierite absorbent which separates the para isomer from a mixture of the same and at least one of the meta and ortho isomers. A second aspect employs a silicalite absorbent which separates the ortho isomer from a mixture of the same and the meta isomer. A third aspect combines the ferrierite and silicalite absorbents in sequence to separate a mixture of the ortho, meta and para isomers into the essentially pure compounds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.