Separation membrane elements, separation membrane module, and process for producing separation membrane element
US8709253B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 9, 2009 |
| Grant date | Apr 29, 2014 |
| Priority date | — |
| Expiry date | Jun 2, 2030 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/755
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The invention offers a separation membrane element that can be produced by a method in which a membrane-sealing portion is formed by, first, immersing end portions of hollow-fiber-shaped porous separation membranes in a resinous liquid and, then, curing the resin, that has a feature in that the membrane-sealing portion is formed of a casting resin and pores of the hollow-fiber-shaped porous separation membranes are filled with a pore-filling resin at the portion at which the membranes are in contact with the membrane-sealing portion, so that the casting resin is strongly bonded with the pore-filling resin, and that has the hollow-fiber-shaped porous separation membranes whose basal portions are flexible, so that breakage of the basal portions and leakage of gas or liquid are less likely to occur when in use; a separation membrane element that has a feature in that in the membrane-sealing portion, at least the surface at a side that is to be in contact with a liquid to be treated is formed of a thermosetting fluororesin, so that the membrane-sealing portion has excellent chemical resistance comparable to that of the conventional membrane-sealing portion formed of a thermoplastic flu…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.