Coated composite hollow fiber gas separation membranes with improved permeance and separation layer adhesion
US12017190B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 10, 2022 |
| Grant date | Jun 25, 2024 |
| Priority date | — |
| Expiry date | Oct 10, 2042 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2325/20
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Composite hollow fiber gas separation membranes with improved permeance and separation layer adhesion are manufactured by providing dipping a hollow fiber membrane substrate in a pre-coat layer coating composition followed by drying to thereby provide a pre-coated substrate and dipping the pre-coated substrate in a separation layer coating composition followed by drying to thereby provide the composite hollow fiber gas separation membranes. The pre-coating composition includes a first polymer dissolved in a first solvent and the separation layer composition includes a second polymer dissolved in a second solvent. The first and second polymers are the same or different, each of the first and second polymers is at least 1 wt % soluble in a same third solvent, the first and second solvents are the same or different, the first and third solvents are the same or different, and the second and third solvent are the same or different.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.