Loading a suspension of cellulose fibers with calcium carbonate, useful e.g. to prepare paper, comprises introducing e.g. calcium hydroxide followed by carbon dioxide into the suspension, precipitating calcium carbonate and adding fillers

摘要

Loading of fibrous material suspension (S) of cellulose fibers with calcium carbonate comprises introducing calcium hydroxide in liquid or dry state, or calcium oxide into the fibrous material suspension; introducing carbon dioxide (8) into the fibrous material suspension; precipitating (3) calcium carbonate from the calcium hydroxide by means of carbon dioxide; and adding a mixture of fillers (11) that are produced by the precipitation of calcium carbonate.