Process for separating nitrogen from mixtures thereof with less polar substances
US4859217A · kind A · utility
121Cited by
10References
7Claims
0Family size
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Key dates
| Filing date | Jun 30, 1987 |
| Grant date | Aug 22, 1989 |
| Priority date | — |
| Expiry date | Jun 30, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S95/902
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The highly lithium exchanged forms of zeolite X, particularly the low silica forms of zeolite X which contain more than ninety equivalent percent lithium cations, have been found to exhibit extraordinary capacities and selectivities for nitrogen adsorption. Such adsorbents are to a surprising degree effective in separating nitrogen from gas streams such as air and mixtures of nitrogen with less polar substances such as hydrogen, argon and methane. Pressure swing adsorption separation process are well suited to take advantage of the exceptional properties of these absorbents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.