Gas phase fractionation method using porous ceramic membrane
US5487774A · kind A · utility
21Cited by
25References
19Claims
0Family size
Assignee
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Key dates
| Filing date | Nov 8, 1993 |
| Grant date | Jan 30, 1996 |
| Priority date | — |
| Expiry date | Nov 8, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D53/228
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Flaw-free porous ceramic membranes fabricated from metal sols and coated onto a porous support are advantageously used in gas phase fractionation methods. Mean pore diameters of less than 40 .ANG., preferably 5-20 .ANG. and most preferably about 15 .ANG., are permeable at lower pressures than existing membranes. Condensation of gases in small pores and non-Knudsen membrane transport mechanisms are employed to facilitate and increase membrane permeability and permselectivity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.