Purification of cadaverine using high boiling point solvent
US10464880B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Feb 21, 2018 |
| Grant date | Nov 5, 2019 |
| Priority date | — |
| Expiry date | Feb 21, 2038 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C211/09
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention relates to a method for the purification of cadaverine from an aqueous cadaverine salt composition comprising one or more involatile impurities, the method comprising: (1) mixing the aqueous cadaverine salt composition with one or more bases to provide an aqueous cadaverine composition having a pH of at least about 12; (2) distilling or evaporating the aqueous cadaverine composition to produce an aqueous cadaverine solution, wherein one or more solvents are added to the evaporation/distillation system before the evaporation/distillation stops, and the one or more solvents comprise at least one or more high boiling point (HBP) solvents having a boiling point of at least 185° C. (1 atm); and (3) subjecting the aqueous cadaverine solution to one or more rectification steps to provide a cadaverine product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.