Reduced fouling of reverse osmosis membranes
US8883012B2 · kind B2 · utility
1Cited by
11References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 16, 2008 |
| Grant date | Nov 11, 2014 |
| Priority date | — |
| Expiry date | Jan 16, 2028 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2303/185
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
The present invention provides a new water purification method and system using reverse osmosis. In particular, the present invention provides methods and water purification systems using an ion exchange resin and absorbent media for pretreatment of water being fed to a reverse osmosis treatment system, where the pretreatment reduces fouling of, or deposits or chemical attack on the membrane surfaces and passageways. Particularly, a macroporous resin having an average pore diameter in the range of 1,000 to 500,000 Angstroms and a crush strength or Chatillon value of at least 24 g/bead (710 μm bead diameter) is used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.