Process for improving the brightness of fine-grained kaolin clays
US5810998A · kind A · utility
22Cited by
22References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 5, 1997 |
| Grant date | Sep 22, 1998 |
| Priority date | — |
| Expiry date | Jun 5, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/64
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Fine-grained kaolin clays having improved brightness can be produced by (a) using centrifugation to fractionate the clay starting material into finer and coarser fractions, (b) subjecting the coarser fraction to flotation to remove discoloring impurities and (c) combining the finer and floated coarser fractions to produce fine-grained kaolin clays having improved brightness.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.