Metal oxide porous ceramic membranes with small pore sizes
US5104539A · kind A · utility
40Cited by
8References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 5, 1991 |
| Grant date | Apr 14, 1992 |
| Priority date | — |
| Expiry date | Apr 5, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2111/00801
- 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.