D-allose crystal and production method thereof
US12122802B2 · kind B2 · utility
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5Claims
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Key dates
| Filing date | Apr 24, 2023 |
| Grant date | Oct 22, 2024 |
| Priority date | — |
| Expiry date | Apr 24, 2043 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07B2200/13
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
High-purity hydrous D-allose crystals and a method of efficiently obtaining the crystals are provided. To a D-allose-containing solution having a purity of D-allose of at least 80% (g/g) in a solute, in a metastable region in a supersaturated state of 30° C. or less, D-allose seed crystals are added. Then, the temperature of the solution is lowered by 10° C. or more for cooling and crystallization to initially obtain “hydrous D-allose crystals”, and the crystallization water thereof is removed in a specified temperature zone to obtain novel “anhydrous D-allose crystals”.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.