Gas anti-solvent recrystallization process
US5360478A · kind A · utility
24Cited by
4References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 28, 1991 |
| Grant date | Nov 1, 1994 |
| Priority date | — |
| Expiry date | Jun 28, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC30B29/54
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Disclosed is a method for recrystallizing solid materials (e.g. RDX) from systems comprised of a solute, which is the eventual material recrystallized, a liquid which is a suitable solvent for the solute, and a gaseous component which is soluble within the solvent and whose presence therein causes the solvent to approach or attain a supersaturated state, thereby precipitating (recrystallizing) the solute material. By control of process parameters (pressure, temperature, time, and rate, rate of injection of gas, etc.) the operator can influence the properties of the material recrystallized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.