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US6270626B1   Paper making retention system of bentonite ...

US6270626B1 Paper making retention system of bentonite ...

This dehydroxylation process results in the oxidation of Fe 2+ to Fe 3+ in ferrous-iron-bearing clay The water-retention capacity of clay minerals is generally proportional to their surface area see the Table. As the water content increases, clays become plastic and then change to a near-liquid state

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