Process for the production of hollow carbon fiber membranes
US5925591A · kind A · utility
9Cited by
3References
9Claims
0Family size
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Key dates
| Filing date | Mar 7, 1995 |
| Grant date | Jul 20, 1999 |
| Priority date | — |
| Expiry date | Mar 7, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2323/081
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for manufacturing a bundle of hollow carbon membranes comprising the steps of: (a) providing a bundle of hollow cellulose fibers; (b) removing substantially all the absorbed water from the said fibers; (c) heating the fibers to a range of temperatures where it pyrolyzes; (d) supplying to the said fibers, during at least part of the heating thereof and after the water has been removed, a catalytically effective amount of a gaseous catalyst selected from among Lewis acids, and ionic salts that are at least partially volatile at the pyrolysis temperature range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.