Asymmetric forward osmosis membranes
US7445712B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 7, 2005 |
| Grant date | Nov 4, 2008 |
| Priority date | — |
| Expiry date | Jul 30, 2026 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2325/24
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
There is disclosed a membrane formulation having high flux for forward osmosis applications. There is disclosed a forward osmosis filtration membrane having a salt rejection 99+% or greater, and comprising an asymmetric hydrophobic porous backing and cellulosic fibers. The membranes of the present invention find use in a variety of applications including osmotic-driven water purification and filtration, desalination of sea water, purification of contaminated aqueous waste streams, and the like. Specifically, there is disclosed a forward osmosis filtration membrane having a skin layer for salt rejection and a porous scaffold layer having a woven or non-woven mesh embedded within it.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.