Ammonia borane purification method
US9005562B2 · kind B2 · utility
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8References
32Claims
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Key dates
| Filing date | Dec 28, 2012 |
| Grant date | Apr 14, 2015 |
| Priority date | — |
| Expiry date | Sep 24, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B21/087
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method of purifying ammonia borane is provided whereby crude ammonia borane is dissolved in a basic aqueous solution, the solution is heated to decompose and precipitate impurities found in the crude ammonia borane, and the impurities are separated by filtration. The aqueous solution containing dissolved ammonia borane is then cooled to a temperature of from 10° C. to −10° C., to precipitate the ammonia borane, which is recovered and dried to yield a high-purity product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.