冰晶石结晶母液制备研究  

Preparation of crystallization mother liquor of cryolite

作　　者：王利[1] 王明花[1,2] 李晓辉 张宏忠[1,2] 李晓旭[1] 徐雨[1] 

机构地区：[1]郑州轻工业学院材料与化学工程学院,河南郑州450001 [2]环境污染治理与生态修复河南省协同创新中心 [3]禹州市德亿化工产品有限公司

出　　处：《无机盐工业》2015年第9期56-58,61,共4页Inorganic Chemicals Industry

基　　金：河南省高校科技创新人才支持计划项目(2013HASTIT031);河南省科技攻关项目(122102210222);郑州轻工业学院2013年国家级大学生创新训练计划项目(201310462106)

摘　　要：为改善现有技术生产的粗冰晶石(Na3Al F6)的结晶性能,确定最佳的制备结晶母液的条件,利用氢氧化钠、氟化氢、氯化铝3种物质为原料制备冰晶石结晶母液。研究了加料顺序、结晶母液p H、结晶时间、结晶温度对结晶母液结晶性能的影响,并对结晶母液自结晶产品进行X射线衍射(XRD)、扫描电镜(SEM)、透射电镜(TEM)表征。研究表明,按照冰晶石分子组成[n(钠)∶n(铝)∶n(氟)=3∶1∶6],采用氯化铝和氟化氢混匀后再加入氢氧化钠的加料顺序,在结晶温度为20℃、弱碱性(p H=8.42)条件下,结晶时间越长,越有利于冰晶石的产生与结晶,结晶母液的结晶性能越好。Na OH,HF,and Al Cl3 were used as the raw materials for preparing the crystallization mother liquor to improve the crystallization properties of the coarse cryolite（Na3Al F6）produced under present technologies,and the best conditions were confirmed.The influences of material feeding sequence,mother liquor pH,crystallization time,and crystallization temperature on crystallization properties of mother liquor were investigated,and the products were characterized by XRD,SEM,and TEM.Results showed that according to the molecular amount-of-substance ratio of cryolite（Na∶Al∶F=3∶1∶6）,choosing the order of‘Al Cl3＋HF full mixed firstly and then add Na OH＇,the longer the time,the more conducive to the generation of cryolite and crystallization,and the better the crystallization properties of the liquor under week base（pH=8.42） conditions at 20 ℃.

关 键 词：冰晶石 结晶母液 制备 表征 

分 类 号：TQ124.3[化学工程—无机化工]