Kaolin clays which are conditioned prior to removing impurities
US6007618A · kind A · utility
10Cited by
9References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 10, 1997 |
| Grant date | Dec 28, 1999 |
| Priority date | — |
| Expiry date | Nov 10, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/64
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Kaolin clays are conditioned for the removal of colored titaniferous impurities by (A) first mixing the kaolin clay with a collector to condition the impurities, in the absence of a dispersant, but in the presence of sufficient water to yield a mixture having a solids content of at least 65 percent by weight and (B) then deflocculating the kaolin clay mixture at a pH of at least 4.0 with a dispersant in amounts sufficient to yield a kaolin clay slurry which is suitable for subsequent processing to remove colored titaniferous impurities.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.