Surface-treated calcium carbonate and phyllosilicate and its use in water purification
US10065872B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 14, 2014 |
| Grant date | Sep 4, 2018 |
| Priority date | — |
| Expiry date | Nov 18, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2103/32
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
The invention relates to a process for the purification of water and/or dewatering of sludges and/or sediments, to the use of a combination of a phyllosilicate and a surface-treated calcium carbonate for water purification and/or dewatering of sludges and/or sediments, as well as to the use of a combination of a phyllosilicate and a surface-treated calcium carbonate for reducing the amount of polymeric flocculation aids in water and/or sludges and/or sediments and to a composite material comprising at least one surface-treated calcium carbonate, at least one phyllosilicate and impurities originated from different sources obtainable by said process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.