Selective solvent extraction of symmetrical tetrachloropyridine
US4329474A · kind A · utility
2Cited by
4References
8Claims
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Key dates
| Filing date | Apr 20, 1981 |
| Grant date | May 11, 1982 |
| Priority date | — |
| Expiry date | Apr 20, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D213/61
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Sym-tet (2,3,5,6-tetrachloropyridine) is selectively extracted from a reaction mixture comprising sym-tet, iodide ions and an aprotic solvent by contacting an extractant solvent with the reaction mixture. The extractant solvent is an alkane having at least six carbon atoms.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.