Removal of aluminum and sulfate ions from aqueous solutions
US5338457A · kind A · utility
8Cited by
13References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 19, 1993 |
| Grant date | Aug 16, 1994 |
| Priority date | — |
| Expiry date | Apr 19, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F1/441
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for removing aluminum and sulfate values from an aqueous solution containing the same which comprises passing the solution through a semi-permeable membrane in a pressure vessel. The permeate solution is depleted of aluminum and sulfate ions and the concentrate solution is concentrated in aluminum and sulfate ions. The concentrate solution can be re-used in alum manufacture and the permeate solution can be discharged into public waterways without further purification.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.