Draw solute for forward osmosis, draw solution including the same, forward osmosis water treatment device using the same, and forward osmosis method for water treatment using the same
US9399193B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 16, 2012 |
| Grant date | Jul 26, 2016 |
| Priority date | — |
| Expiry date | May 10, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F1/445
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A draw solute for forward osmosis may include a copolymer including a first structural unit, where a temperature-sensitive side chain is graft polymerized, and a second structural unit including a hydrophilic functional group. The temperature-sensitive side chain may include a structural unit for a side chain including a temperature-sensitive moiety. The temperature-sensitive moiety may be represented by Chemical Formula 1, Chemical Formula 2, or Chemical Formula 3:wherein R1 and R2 are each independently hydrogen or a linear or branched C3 to C5 alkyl group, provided that at least one of R1 and R2 is not hydrogen, R3 is a C3 to C5 alkylene group, and R4 is a linear or branched C3 to C5 alkyl group. The draw solute may be used to form an osmosis draw solution for use in a forward osmosis water treatment device and method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.