Method and apparatus for the production of purified liquids and vapors
US7413596B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 5, 2004 |
| Grant date | Aug 19, 2008 |
| Priority date | — |
| Expiry date | Nov 5, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2237/31705
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
The present invention provides methods and apparatus for the production of liquids and vapors that are free of, or substantially free of, dissolved or trapped gases. In one embodiment, a liquid is placed in a sealed vessel and subjected to a temperature below the freezing point of the liquid for sufficient time to substantially, if not completely, turn the liquid into a solid. Concurrent with or subsequent to the cooling of the liquid, the interior of the vessel is subjected to a vacuum so as to evacuate all or substantially all of the gaseous atmosphere. Thereafter, the vessel is heated to a temperature above the melting point of the liquid, allowing the frozen material to return to its liquid form or sublimate to form a vapor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.