Ammonia borane purification method
US9604850B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 19, 2014 |
| Grant date | Mar 28, 2017 |
| Priority date | — |
| Expiry date | Dec 19, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/80
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method of purifying ammonia borane is provided in which crude ammonia borane is dissolved in an organic solvent, such as an ether, and mixed with a basic aqueous solution to form a two-phase system. The pH of the aqueous solution and the temperature are adjusted to increase the solubility of the impurities and decrease the solubility of the ammonia borane in the basic aqueous solution, without causing decomposition of the ammonia borane. The impurities are separated from the crude ammonia borane solution, the mixture is phase-separated and the dissolved ammonia borane is isolated from the organic solvent fraction. High purity ammonia borane is obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.