PROCEDURE FOR THE CONTINUOUS PREPARATION OF CARBONARO CALCICO PRECIPITADO.

摘要

Procedure for the continuous preparation of precipitated calcium carbonate with controllable particle size, by reaction of calcium hydroxide with CO2 in a separate phase of germ formation, in which predominantly calcium carbonate germs are formed, and a crystal growth phase , separated from the formation of germs, in which the germs formed in the germ formation phase grow predominantly corresponding to the supply of calcium hydroxide and CO2, characterized in that the particle size of the precipitated calcium carbonate is controlled by the concentration of calcium carbonate formed in the germ formation phase, varying the ratio of the CO2 flow introduced to the calcium hydroxide flow a) by the calcium hydroxide flow, with a constant reactor volume and a constant CO2 flow , b) keeping the calcium hydroxide flow rate constant