Process for beneficiating Minnesota kaolin

Compositions: ceramic – Ceramic compositions – Clay containing

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501147, 106486, 106488, 1621818, 423156, C04B 3304

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active

053766059

ABSTRACT:
A process for increasing the brightness of Minnesota kaolin clay containing chlorite and siderite mineral impurities comprising treating the clay with a strong mineral acid preferably in combination with magnetic separation.

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Xie et al. "High Gradient Magnetic Separation and Chemical Bleaching of Guoshan Kaolin" (1986) Feijinshukang (1), 30-6, 42 Peoples Republic of China.
"Magnetic Separations Near Market Breakthrough" (Jan. 28, 1974) C9EN pp. 21-22.

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