Method for purification through sublimation
US6840968B2 · kind B2 · utility
1Cited by
2References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 28, 2003 |
| Grant date | Jan 11, 2005 |
| Priority date | — |
| Expiry date | Jun 19, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D7/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for purification through sublimation includes a step of compressing a powdered object to be purified in a tight and compact manner such as granules or cakes under a preset pressure, temperature and time for containing a greater amount of substances in a unit volume so that the object to be purified has an improved heat transfer efficiency and heating power is more stable. During sublimation process a flowing inertia gas is channeled to carry the sublimated and purified substances so that the purified substance flow in the same direction for depositing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.