METHOD FOR MANUFACTURING CALCIUM CARBONATE WHISKER

摘要

PROBLEM TO BE SOLVED: To continuously manufacture calcium carbonate whisker useful as a functional filler for paper making, plastics, rubber or the like by using caustification reaction. SOLUTION: The calcium carbonate whisker useful as a functional filler for paper making, plastics, rubber or the like is obtained by continuously adding a suspension of calcium hydroxide and an aqueous solution essentially comprising sodium carbonate to a reaction chamber to cause a caustification reaction. The concentration and flow rates for addition of the calcium hydroxide suspension and the aqueous solution essentially comprising sodium carbonate are controlled to bring the product of the calcium ion concentration and carbonate ion concentration [Ca2+][CO32-] in the reaction tank and the ratio of the calcium ion concentration to the carbonate ion concentration [Ca2+]/[CO32-] into specified ranges. The reaction temperature is also controlled. COPYRIGHT: (C)2004,JPO