高Ca^(2+)浓度CO_2沉淀法由电石渣制备纳米CaCO_3  

Preparation of nano CaCO_3 from calcium carbide residue by CO_2 precipitation with high Ca^(2+) concentration

作　　者：王百年[1] 葛礼响 曹萌[1] 杨保俊[1] 

机构地区：[1]合肥工业大学化学与化工学院,安徽合肥230009

出　　处：《化工环保》2016年第4期460-465,共6页Environmental Protection of Chemical Industry

摘　　要：以NH4Cl溶液为浸取剂、CO2为碳化剂、多聚磷酸钠(STP)为添加剂,由电石渣制备纳米Ca CO3。实验结果表明:电石渣浸取液Ca2+浓度为1.0 mol/L、STP加入量为3.00%时,可制备出粒径为30~60 nm的纳米Ca CO3;STP可有效控制纳米Ca CO3的粒度和形貌;在最佳工艺条件下,由电石渣制备纳米Ca CO3的产率为80%,处理1 t电石渣产生的经济效益约为2 670元。Nano CaCO3 was prepared from calcium carbide residue using NH4C1 solution as leaching agent, CO2 as carbonation agent, sodium tripolyphosphate （STP） as additive agent. The experimental results show that： When Ca2＋ concentration of calcium carbide residue leaching solution is 1.0 mol/L and STP dosage is 3.00%, the nano CaCO3 with 30-60 nm of particle size is prepared; STP has good effect on control of particle size and morphology of nano CaCO3; Under the optimum technological conditions, the yield of nano CaCO3 from calcium carbide residue is 80%, and the economic benefits of calcium carbide residue treatment is 2 670 yuan per ton.

关 键 词：纳米CACO 电石渣 氯化铵 三聚磷酸钠 CO2 

分 类 号：X705[环境科学与工程—环境工程]