Process for the purification of water using surface treated calcium carbonate
US8728322B2 · kind B2 · utility
1Cited by
13References
37Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 19, 2008 |
| Grant date | May 20, 2014 |
| Priority date | — |
| Expiry date | Dec 6, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2982
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
The present invention relates to a process for the purification of water, wherein a surface-reacted natural calcium carbonate is brought into contact with the water to be purified, the surface-reacted natural calcium carbonate being the reaction product of a natural calcium carbonate with an acid and carbon dioxide, which is formed in situ by the acid treatment and/or supplied externally.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.