Apparatus for the removal of dissolved solids from liquids using bipolar membranes
US4871431A · kind A · utility
78Cited by
4References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 11, 1988 |
| Grant date | Oct 3, 1989 |
| Priority date | — |
| Expiry date | Jul 11, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2201/46115
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An apparatus containing a multiplicity of two or three chamber units comprising a combination of ion exchange membranes and bipolar membranes with certain of said chambers containing a filler of ion-exchange material. The apparatus can be used to remove weakly ionized substances such as silica from water. The three chamber unit can be further used to pretreat (acidify) water prior to treatment of the water in an electrodialysis or electrodeionization stack.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.