Surface-coated calcium carbonate-containing material and process for the purification of water
US10843932B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 3, 2016 |
| Grant date | Nov 24, 2020 |
| Priority date | — |
| Expiry date | May 25, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2103/365
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention relates to at least one surface-reacted calcium carbonate-comprising mineral material and/or a surface-reacted precipitated calcium carbonate that is/are coated with at least one anionic polymer to obtain a surface-coated calcium carbonate-comprising material as well as to a process for the preparation of the surface-coated calcium carbonate-comprising material. Furthermore, the present invention relates to a process for the purification of water and/or dewatering of sludges and/or suspended sediments and to the use of a surface-coated calcium carbonate-comprising material for water purification and/or dewatering of sludges and/or suspended sediments.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.