Extraction of pyrethrum
Pyrethrins are extracted from a solution of pyrethrum material in a low boiling hydrocarbon solvent with 4 to 8 C atoms into methanol or ethanol containing water. The pyrethrins are back-extracted into the hydrocarbon solvent after adjusting the partition coefficients of the pyrethrins and non-pyret...
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| Format: | Patent |
| Sprache: | eng |
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| Zusammenfassung: | Pyrethrins are extracted from a solution of pyrethrum material in a low boiling hydrocarbon solvent with 4 to 8 C atoms into methanol or ethanol containing water. The pyrethrins are back-extracted into the hydrocarbon solvent after adjusting the partition coefficients of the pyrethrins and non-pyrethrins. |
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