Process for removal of fluoride and phosphorus-type contaminants from acidic wastewater
US4734200A · kind A · utility
33Cited by
2References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 4, 1986 |
| Grant date | Mar 29, 1988 |
| Priority date | — |
| Expiry date | Apr 4, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J47/11
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for treating acidic process waste water containing SiF.sub.6.sup.2- is disclosed. The process is carried out by contacting the waste water with a strong base ion exchange resin and loading SiF.sub.6.sup.2- onto the resin. Phosphate ions are then removed from the waste water by raising the pH of the waste water to between about 5.0 and 7.0 and contacting the waste water with a strong base ion exchange resin and loading phosphate ions onto the resin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.