Method for processing fine kaolin
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United States of America Patent
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Issued Date -
Aug 24, 2006
app pub date -
Jan 30, 2006
filing date -
Jan 31, 2005
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Abandoned
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Abstract
A method for processing fine kaolin which is comprised of the steps of dispersing (Dp) kaolin by adding the chemical dispersion agent in the optimum amount required, so that the pulp reaches a minimum viscosity and a maximum dispersion of particles, and submitting same to a deaeration step (Ds), and the latter is followed by the stages of conditioning (Co), centrifugation (Ce1, Ce2), magnetic separation (Sp), chemical bleaching (Br), said method also being comprised of the steps of: (a) introducing chemical dispersion agents in said aqueous kaolin suspension after the deaeration step (Ds), so that the titanium impurities can aggregate into one another; (b) adjusting the pH of the aqueous kaolin solution by adding a suitable amount of basic reagents; (c) submitting the pulp to a vigorous agitation, so that the kaolin is fully dispersed and also the titanium particles collide against one another to form micro-aggregates.
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