Method of improving the selectivity of carbon membranes by chemical carbon vapor deposition
US5695818A · kind A · utility
14Cited by
5References
9Claims
0Family size
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Key dates
| Filing date | Aug 21, 1996 |
| Grant date | Dec 9, 1997 |
| Priority date | — |
| Expiry date | Aug 21, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2111/00801
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for manufacturing carbon membranes having controlled pore sizes comprises the steps of: a) causing a stream of a pyrolysable carbon-containing gas to come into contact with a carbon membrane having a pore size and/or distribution larger than the desired pore size and/or distribution; b) raising the ambient temperature of the said membrane to or above the temperatures at which the adsorbed carbon-containing gas pyrolyzes; and c) substantially purging the atmosphere surrounding the membrane from carbon-containing gas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.