D-allose crystal and production method thereof
US11673906B2 · kind B2 · utility
0Cited by
1References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 9, 2020 |
| Grant date | Jun 13, 2023 |
| Priority date | — |
| Expiry date | Apr 18, 2041 |
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.