Method for recovering indicine-N-oxide
US4458082A · kind A · utility
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2References
4Claims
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Key dates
| Filing date | Aug 23, 1982 |
| Grant date | Jul 3, 1984 |
| Priority date | — |
| Expiry date | Aug 23, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D487/04
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
An improved process for recovering Indicine-N-oxide from plant sources which involves water extracting the plant material, preferably by water buffered at pH 7, followed by adsorbing the Indicine-N-oxide from the extract, after which the Indicine-N-oxide is eluted from the adsorbent in alcoholic solution, then concentrated and purified as heretofore. Desirably, the adsorbed Indicine-N-oxide is water washed prior to elution so as to remove any water soluble impurities that had been adsorbed from the extract. A preferred adsorbent is a cross linked polystyrene.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.