Method for efficiently preparing micron-sized regular hexagonal calcium carbonate

The invention discloses a method for efficiently preparing micron-sized regular hexagonal calcium carbonate. According to the method, based on an aqueous solution of calcium chloride, a NH3 H2O-NH4Clsolution is used as a buffer solution and a precipitating agent, soluble zinc salt is a crystal form controlling agent, CO2 gas is introduced, and the regular hexagonal calcium carbonate with a regular shape and a side length of 4.5-10 microns is prepared. The method has the advantages of simple preparation and high yield, and the obtained micro-sized regular hexagonal calcium carbonate belongs tolight calcium carbonate, can be used as a filler in industries such as rubber, plastic, papermaking, coating, ink and the like, can be used for production of organic synthesis, metallurgy, glass, asbestos and the like, and can also be used as a raw material for tooth powder, toothpaste and other cosmetics. 本发明公开了种高效制备微米级正六边形碳酸钙的方法，该方法基于氯化钙水溶液，采用NH·HO-NHCl溶液作为缓冲溶液和沉淀剂，可溶性锌盐为晶型控制剂，通入CO气体，制备出形貌规整、边长为4.5～10μm的正六边形碳酸钙。本发明制备方法简