Process of reducing the oxygen content in gas mixtures
US4541997A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 16, 1983 |
| Grant date | Sep 17, 1985 |
| Priority date | — |
| Expiry date | Feb 16, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B15/023
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process of reducing the oxygen content in gas mixtures to 0.0-1.5% by volume, in which process the gas is contacted with a solution containing anthrahydroquinone derivatives capable of being oxidized with molecular oxygen under formation of hydrogen peroxide. The supply of oxygen is so adjusted that the amount of oxygen supplied, upon quantitative formation of hydrogen peroxide, stoichiometrically corresponds to not more than 90%, preferably 50%, of the supplied amount of anthrahydroquinone derivative. The hydrogen peroxide content at the contact surfaces between the solution and the gas must not exceed 100 millimols per liter at a simultaneous oxygen gas pressure of not more than 100 millibars. The oxygen-poor gas mixture in accordance with the process of this invention may be used as a protective or inert gas in chemical process industries where use is made of inflammable gases.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.