Method for beneficiating discolored kaolin to produce high brightness coating clay
US5685900A · kind A · utility
33Cited by
15References
16Claims
0Family size
Assignee
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Key dates
| Filing date | Oct 18, 1995 |
| Grant date | Nov 11, 1997 |
| Priority date | — |
| Expiry date | Oct 18, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/60
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for beneficiating a low brightness fine particle size discolored kaolin crude to produce a high brightness coating clay. By combining the two beneficiating techniques of selective flocculation and ozonation, a synergistic phenomena occurs and a clay product of superior brightness and whiteness can be obtained from fine discolored clays that cannot be achieved by beneficiation with either process singularly. By passing the flocced clay through ozonation, the flocculant polymer left in the clay can be completely destroyed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.