Method for measuring the local hydraulic permeability of a sub-group of hollow fibre of a bundle of hollow fibres
US7250108B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 24, 2004 |
| Grant date | Jul 31, 2007 |
| Priority date | — |
| Expiry date | May 7, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2015/084
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method is provided for measuring the local hydraulic permeability, Lpi, of a sub-group of hollow fibres of a bundle of hollow fibres mounted in a tubular casing. The method comprises a step of placing the casing containing the bundle in a vertical position, the lateral opening of the casing being disposed toward the bottom, and sealing the lower end of the casing. A graduated, calibrated tube is applied in a vertical position over a portion of the upper cut surface of the bundle to form a sealed connection there between. A liquid is passed through the lateral opening of the casing at a defined flow rate, and the time required for the liquid to pass from a first graduation to a second graduation of the tube is measured. Lpi can then be calculated from the formula Lpi=V/tPSi in which; V represents the volume of the tube between the two graduations; t represents the time that the liquid takes to pass from the first graduation to the second graduation of the tube; P represents the transmembrane pressure; and Si represents the surface area of the hollow fibres belonging to the sub-group under consideration for the measurement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.