Method and apparatus for dehydration of water-containing substance by electro-osmosis
US4549947A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 21, 1983 |
| Grant date | Oct 29, 1985 |
| Priority date | — |
| Expiry date | Dec 21, 2003 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D61/56
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method and apparatus is provided for effecting dehydration of a water-containing substance held in a receiving compartment formed in an intervening space between a cathode and an anode by means of the electro-osmotic force of a microporous membrane. The apparatus of this invention has a semipermeable membranes disposed as diaphragms for the receiving compartment and the microporous membrane disposed on the anode side of the diaphragms arranged on the cathode side. It effects the dehydration of the water-containing substance by passing electric current between the two electrodes and discharges the water resulting from the dehydration through a space formed between the microporous membrane and the cathode side diaphragm. By this invention, various water-containing substances such as aqueous solutions, colloids, pastes, dispersions, and gels, which the conventional methods and apparatuses dehydrate with great difficulty, can be dehydrated at high speed with high efficiency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.