从化工废水制备高品质二水合硫酸钙晶须的研究  

Preparing Calcium Sulfate Dihydrate Whisker from Chemical Industrial Wastewater

作　　者：王寿武[1,2] 刘鹏[1] 俞子坤 计吉祥 吴争鸣[1,2] WANG Shou-wu LIU Peng YU Zi-kun JI Ji-xiang WU Zheng-ming(Department of Chemical Engineering, Huaihai Institute of Technology, Lianyungang 222005, China Jiangsu Institute of Marine Resources, Lianyungang 222005, China)

机构地区：[1]淮海工学院化学工程学院,江苏连云港222005 [2]江苏省海洋资源开发研究院,江苏连云港222005

出　　处：《广州化学》2017年第1期62-65,共4页Guangzhou Chemistry

基　　金：江苏省大学生创新项目(省级重点)(淮工院发教字〔2015〕31号);淮海工学院校级品牌专业资助项目(淮工院发〔2015〕114)

摘　　要：以含有硫酸根离子的化工废水和钙盐制得的硫酸钙为原料,十六烷基硫酸钠为分散剂,氯化镁为晶型助长剂,用硫酸调节p H,采用水热法制备二水合硫酸钙晶须。研究了反应温度和降温速度对二水合硫酸钙晶须的影响,通过扫描电镜(SEM)测量硫酸钙晶须的长径比,用热重分析仪研究了硫酸钙晶须的热重行为。结果表明,最佳反应温度为125℃、反应降温速度为30℃/30 min,长径比可达80以上。The calcium sulfate dihydrate whisker was prepared with hydrothermal method. The raw material calcium sulfate was made with chemical wastewater containing sulfuric acid root ion and calcium salt. The dispersant and crystal promoter was cetyl sodium sulfate and magnesium chloride, respectively. The solution p H was adjusted by sulfuric acid. In this paper, the effect of reaction temperature and cooling speed on the product quality of calcium sulfate dihydrate whisker was discussed. The length-diameter of calcium sulphate whisker was measured by scanning electron microscopy（SEM）, and the thermogravimetric analysis of the calcium sulfate whisker was carried out using thermogravimetric analyzer. The experimental results showed that the optimal reaction temperature was 125℃, the cooling rate of reaction was 30℃ per 30 min, and the draw ratio was more than 80.

关 键 词：化工废水 水热法 扫描电镜 长径比 

分 类 号：TQ132.3[化学工程—无机化工]