Tubesheet for semipermeable membrane devices
US4800019A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 22, 1988 |
| Grant date | Jan 24, 1989 |
| Priority date | — |
| Expiry date | Apr 22, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D63/031
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for producing hollow fiber permeable devices having an essentially leak-free seal between the hollow fibers and the tubesheet that consists of heating the tubesheet containing the hollow fibers potted therein at a temperature essentially equal to or greater than the glass transition temperature of the thermoplastic material or the softening point of the thermoset material of the hollow fiber for a period of time sufficient to essentially densify the hollow fibers in the potted portion of the tubesheet and whereby a major portion of the interior diameter of the bores of the hollow fibers embedded in the tubesheet is enlarged; and the fiber permeable devices themselves.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.