Treatment of water
US5156746A · kind A · utility
22Cited by
8References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 19, 1991 |
| Grant date | Oct 20, 1992 |
| Priority date | — |
| Expiry date | Jul 19, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S210/912
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A water quality improvement process is provided for acid water containing sulphate and/or sulphite ions. The water is continuously fed into a fluidized bed containing calcium carbonate particles. The water consumes calcium carbonate and has its pH increased while calcium sulphate CaSO.sub.4 and/or CaSO.sub.3 are produced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.