Compositions: ceramic – Ceramic compositions – Clay containing
Patent
1990-04-20
1993-09-07
Bell, Mark L.
Compositions: ceramic
Ceramic compositions
Clay containing
501149, 1621818, C04B 3310
Patent
active
052428745
ABSTRACT:
The present invention refers to a process for whitening kaolinitic clays by adding an aqueous acid solution containing sodium bisulfite and atomized aluminum powder, thereby causing the reduction of the contaminating iron ions present in the kaolin, resulting in a considerable increase in its whiteness index as well as a reduction of the particle size of the product obtained.
De Oliveira Fabio M.
Ortiz Nilce
Alcoa Aluminio S.A.
Bell Mark L.
D'Ambrosio Felix J.
Foryt John P.
Gallo Chris
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