Permeable membrane and method
US6503294B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 2001 |
| Grant date | Jan 7, 2003 |
| Priority date | — |
| Expiry date | Feb 28, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2323/04
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Permeable membrane porous substrate and a functional layer provided on the surface of and/or inside the porous substrate, the functional layer having a hydrogen permeation rate of 1×10−10 mol/s·m2·Pa or more, and satisfying at least one of the following properties (1) through (3):(1) Hydrogen is selectively caused to permeate preferentially to water vapor.(2) When a test tube containing ethylene glycol and sealed with the permeable membrane is placed in a 85° C. oven, the ethylene glycol decrease rate measured is 1×10−2 g/hour or less, per square centimeter (1 cm2) of the permeable membrane.(3) When a test tube containing 5% ammonium adipate ethylene glycol solution and sealed with the permeable membrane is placed in a 85° C. oven for 2 days, the acid quantity of the solution is 5×10−3 equivalent or less, per square centimeter of the permeable membrane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.