摘要
以硫酸为晶形控制剂，与Ｃａ（ＯＨ）２悬浮液混匀加入反应器，间歇碳化制备超细立方形ＣａＣＯ３。其条件为：硫酸用量０．０２ｍｏｌ／ｍｏｌＣａＯ，Ｃａ（ＯＨ）２悬浮液浓度９％～１１％（质量分数），碳化温度１６～２０℃，ＣＯ２浓度２０％～２５％（体积分数），碳化空塔气速０．７０～１．４２ｃｍ／ｓ。得到平均粒径为０．０４５μｍ的立方形超细ＣａＣＯ３，粒度分布窄。该法生产方法简单，生产过程系统粘度变化不大，易于操作控制。
Using sulfuric acid as the crystalform controlling agent,it mixed homogeneously with Ca(OH) 2 suspension in the reactor,then the CO 2 is passed into the reactor for batch carbonation,finally the ultrafine cubic CaCO 3 particle is got. The optimum conditions are as follows:H 2SO 4,0.02 mol/mol CaO;the concentration of the Ca(OH) 2 suspension,9%～11%;the carbonation temperature 10～20 ℃;the concentration of CO 2,20%～25%;the gas velocity of opening tower,0.70～1.42 cm/s.The average diameter of the ultrafine cubic CaCO 3 particles obtained is 0.04 μm,and the particle size distribution is narrow.This method is simple and easy to control,the viscosity of the system varies litte in the process.
出处
《无机盐工业》
CAS
1998年第6期5-7,共3页
Inorganic Chemicals Industry
关键词
超细碳酸钙
晶形控制剂
硫酸
碳酸钙
ultrafine CaCO 3,preparation,crystalline controlling agent,sulfuric acid
