Metal oxide porous ceramic membranes with small pore sizes
US5006248A · kind A · utility
64Cited by
1References
4Claims
0Family size
Assignee
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Key dates
| Filing date | Aug 6, 1990 |
| Grant date | Apr 9, 1991 |
| Priority date | — |
| Expiry date | Aug 6, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2219/00177
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method is disclosed for the production of metal oxide ceramic membranes of very small pore size. The process is particularly useful in the creation of titanium and other transition metal oxide membranes. The method utilizes a sol-gel process in which the rate of particle formation is controlled by substituting a relatively large alcohol in the metal alkoxide and by limiting the available water. Stable, transparent metal oxide ceramic membranes are created having a narrow distribution of pore size, with the pore diameter being manipulable in the range of 5 to 40 Angstroms.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.