Method to make carbon molecular sieve hollow fiber membranes
US11517857B2 · kind B2 · utility
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23References
16Claims
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Key dates
| Filing date | Mar 20, 2018 |
| Grant date | Dec 6, 2022 |
| Priority date | — |
| Expiry date | Mar 24, 2038 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2323/081
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method of making a hollow fiber carbon molecular sieve is comprised of heating a hollow polymer fiber to a carbonization temperature in an atmosphere that is non-oxidizing to form a hollow fiber carbon molecular sieve, wherein during at least a portion of the heating a tensile force is applied to the hollow polymer fiber. The method may improve the separation of gases similar in size such a propylene from propane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.