Process for the microwave beneficiation of discolored kaolin cla

Details Process for the microwave beneficiation of discolored kaolin cla Process for the microwave beneficiation of discolored kaolin cla

1997-04-23

1998-11-03

Marcheschi, Michael

Compositions: ceramic

Ceramic compositions

Clay containing

501146, 106486, 106488, 4231181, 423132, 209 10, 209 11, B03B 102, B03B 104, B03B 500, C09C 142

Patent

active

058308180

ABSTRACT:
Kaolin clay materials containing discoloring impurities can be beneficiated by microwave irradiation in the presence of water and a polyprotic acid component to produce a beneficiated kaolin clay material having improved color and brightness.

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Francombe et al.; Structure Transformations Effected by the Dehydration of Diaspore, Goethite and Delta Ferric Oxide; Clay Minerals Bulletin; vol. 4; pp. 1-14 Aug. 1959.
Schwertmann et al.; Iron Substitution in Soil and Synthetic Anatase; 1995; Clay & Clay Minerals; vol. 43; pp. 599-606 (no month).

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