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发明授权
CN108439449B 一种高效制备微米级纺锤状碳酸钙的方法 有权

一种高效制备微米级纺锤状碳酸钙的方法
摘要：
本发明公开了一种高效制备微米级纺锤状碳酸钙的方法，该方法基于氯化钙水溶液，采用NH3·H2O‑NH4Cl溶液作为缓冲溶液和沉淀剂，通入CO2气体，制备出形貌规整、长度为10～25μm、径向长度为2.40～4.80μm的纺锤状碳酸钙(长径比为2.00～10.42)，产率可达95％以上。本发明制备的微米级纺锤状碳酸钙属于轻质碳酸钙，可用作橡胶、塑料、造纸、涂料和油墨等行业的填料，用于有机合成、冶金、玻璃和石棉等生产中，也可用作牙粉、牙膏及其它化妆品的原料。
摘要（英）：

The invention discloses a method for efficiently preparing micron-sized spindle-shaped calcium carbonate. The method comprises the steps that based on an aqueous calcium chloride solution, an NH3.H2O-NH4Cl solution is adopted as a buffer solution and a precipitant, and CO2 gas is introduced to prepare spindle-shaped calcium carbonate, wherein the shape is regular, the length is 10-25 microns, theradial length is 2.40-4.80 microns, the length-diameter ratio is 2.00-10.42, and the yield can be up to 95% or above. The micron-sized spindle-shaped calcium carbonate prepared by the method belongs to lightweight calcium carbonate, can be used as filler in industries of rubber, plastic, papermaking, coating, ink and the like and a raw material for tooth powder, toothpaste and other cosmetics andcan be used in the production of organic synthesis, metallurgy, glass, asbestos and the like.

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