Process for the treatment of effluent streams
US6280630A · kind A · utility
18Cited by
6References
22Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 8, 2000 |
| Grant date | Aug 28, 2001 |
| Priority date | — |
| Expiry date | Mar 8, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S210/912
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
This invention relates to a process for removing sulphates and calcium from a water stream which includes the steps of: combining the water stream and an amount of amorphous aluminum trihydroxide (Al(OH).sub.3); allowing the formation of ettringite (3CaO.Al.sub.2 O.sub.3.3CaSO.sub.4.31/32H.sub.2 O) as a precipitate; and removing the precipitated ettringite from the water stream.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.