System for removal of halocarbon gas from waste anesthetic gases
US6729329B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Aug 6, 2001 |
| Grant date | May 4, 2004 |
| Priority date | — |
| Expiry date | Nov 27, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02C20/10
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A system for removing halocarbon gas components from waste anesthetic gases using the resource of cold oxygen from liquid oxygen which is stored cryogenically at a healthcare facility. The oxygen is warmed while cooling of waste anesthetic gases from anesthetizing locations of a healthcare facility. Two heat exchangers/condensers are provided. In the first, the waste gas is cooled to about 0° C. thereby condensing any water vapor in the waste gas. In the second, the waste gas is further cooled to about −150° C. thereby condensing and liquefying the halocarbon gas components, which are removed to a tank for recycling and/or destruction. The remainder of the waste gases (e.g., nitrogen, oxygen and nitrous oxide) are vented to the atmosphere. The warmed oxygen is piped to the healthcare facility for its normal uses after it has been warmed by the waste anesthetic gases in the two heat exchangers/condensers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.