Process for the preparation of aqueous suspensions containing at

Chemistry of inorganic compounds – Carbon or compound thereof – Oxygen containing

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423265, 106306, C01F 524, C01F 1118

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042423180

ABSTRACT:
Process for the preparation of an aqueous suspension containing at least 65% by weight of calcium carbonate, in which process calcium carbonate is crystallized in a dilute aqueous medium, a wet concentrate of calcium carbonate is separated from the resulting dilute aqueous suspension of calcium carbonate and the said calcium carbonate concentrate is fluidized and homogenized in the presence of a dispersing agent. The calcium carbonate is crystallized in the presence of a water-soluble polyelectrolyte and the calcium carbonate concentrate is separated from the dilute suspension of calcium carbonate by essentially mechanical separating means.

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patent: 4018877 (1977-04-01), Woode
Williams et al., "Effect of Polyelectrolytes on the Precipitation of Calcium Carbonate", JACS, vol. 79, Sep. 57, pp. 4898-4900.

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