CALCIUM CARBONATE, AND METHOD FOR PRODUCING THE SAME

摘要

Calcium carbonate particles having an average shorter diameter of primary particles of 0.1 to 0.5 mu m, an average longer diameter of primary particles of 0.15 to 1.5 mu m and an aspect ratio of 1.5 to 3.0 and preferably in the shape of a grain of rice, a straw ricebag or a cylinder having rounded corners; and a method for producing calcium carbonate through the reaction of calcium hydroxide with carbon dioxide, characterized in that an organic compound having a hydroxyl group is added to the carbonization reaction system in an amount of 20 to 200 parts by weight relative to 100 parts by weight of calcium oxide which is a raw material used as the source of calcium. Said calcium carbonate particles exhibit good dispersibility and are produced by the above method.