摘要
研究了由农用碳酸氢铵与精制硫酸锌制备碱式碳酸锌的工艺及产物的热解性能．估算表明了制备过程的热力学优势．优化后的工艺条件是：碳酸氢铵对硫酸锌的过剩系数为１．００～１．２０，锌液中Ｚｎ２＋浓度约１００ｇ／Ｌ．产物主要是无定形的Ｚｎ５（ＣＯ３）２（ＯＨ）６．其热解过程主要发生在３００℃以下．焙解温度可控制在４００℃左右．
The preparation of basic zinc carbonate (BZC) from purified zinc sulfate and fertilizer-grade ammonium bicarbonate and the pyrolysis properties of BZC were systematically investigated. The results of thermodynamic calculation indicated the thermodynamic superiority of the reaction ZnSO 4+NH 4HCO 3 BZC. The preferrential process conditions were as follows: excess coefficient of NH 4HCO 3 1.00～1.20, concentration of Zn 2+ in ZnSO 4 solution about 100 g/L. The resulted BZC was mainly amorphous Zn 5(CO 3) 2(OH) 6. The thermal decomposition of BZC mainly occurred below 300℃. The roasting temperature is suggested to be controlled at about 400℃.
出处
《化工冶金》
CSCD
北大核心
1997年第1期63-66,共4页
关键词
碱式碳酸锌
制备
热解性能
Basic zinc carbonate, Preparation, Pyrolysis
