Rare earth-containing alloys and method for purification of hydrogen gas therewith
US4215008A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jun 27, 1978 |
| Grant date | Jul 29, 1980 |
| Priority date | — |
| Expiry date | Jun 27, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S420/90
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An efficient and economical method for the purification of hydrogen gas is proposed by use of an alloy of a rare earth metal with nickel and/or cobalt plus, optionally, iron, copper or chromium, utilizing the great selectivity of the alloy for the adsorption of hydrogen gas with very little adsorptivity for impurity gases commonly found in an impure hydrogen gas. The purification process is carried out by the pressurized adsorption of hydrogen on the alloy powder, followed by the recovery of high-purity hydrogen gas released from the alloy under reduced pressure or by heating. The alloy in the form of powder is preferably activated prior to use by repeated adsorption-desorption cycles of hydrogen on and from the alloy powder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.