Method of treating aqueous solutions
US4632760A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Sep 11, 1985 |
| Grant date | Dec 30, 1986 |
| Priority date | — |
| Expiry date | Sep 11, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D11/04
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Method of treating an aqueous solution of a non-volatile inorganic solute to produce a more concentrated solution or to crystallize solid solute from the solution. The solution is contacted at a higher temperature T.sub.1 with a suitable organic liquid to extract water and form an organic phase (organic liquid contacting water). The organic phase, separated, cooled and contacted at a lower temperature T.sub.2 with a drying medium to dry the organic liquid which is then re-used to treat a further quantity of aqueous solution. The drying medium may be a portion of the concentrated aqueous solution resulting from the first step, or it may be a concentrated aqueous solution or a slurry from an outside source, or it may be a combination of two such drying media.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.