一步常压酸化法制备无水硫酸钙晶须
|
摘要
以生石膏为原料,一步常压酸化法制备无水硫酸钙晶须。采用单因素条件实验研究了反应温度、反应时间、浓盐酸与水的体积比对产物的影响,并借助X射线衍射(XRD)、扫描电子显微镜(SEM)、X射线能谱(EDS)对样品进行了表征。实验结果表明:在反应温度为70℃、反应时间为4 h、浓盐酸和水的体积比为4∶1的条件下,一步法制备出了长度为10~20μm、直径为0.1~0.3μm的无水硫酸钙晶须。
Using gypsum as raw material,anhydrous calcium sulfate whiskers were prepared by one-step atmospheric acidification method.The influences of reaction temperature,time,and volume ratio of concentrated-HCl/H2 O on the product were investigated by single factor tests.Whiskers were characterized by scanning electron microscopy(SEM),X-ray diffraction(XRD),and X-ray spectroscopy(EDS).The experiment results showed that,when the volume ratio of concentrated-HCl/H2 O was 4∶1,and the reaction temperature was controlled above 70 ℃ for 4 h,anhydrous calcium sulfate whisker can be formed with lengths of 10~20 μm and diameters of 0.1~0.3 μm.
Using gypsum as raw material,anhydrous calcium sulfate whiskers were prepared by one-step atmospheric acidification method.The influences of reaction temperature,time,and volume ratio of concentrated-HCl/H2 O on the product were investigated by single factor tests.Whiskers were characterized by scanning electron microscopy(SEM),X-ray diffraction(XRD),and X-ray spectroscopy(EDS).The experiment results showed that,when the volume ratio of concentrated-HCl/H2 O was 4∶1,and the reaction temperature was controlled above 70 ℃ for 4 h,anhydrous calcium sulfate whisker can be formed with lengths of 10~20 μm and diameters of 0.1~0.3 μm.
引文
[1]韩青,罗康碧,李沪萍,等.磷石膏的高效利用-硫酸钙晶须的制备与应用[J].无机盐工业,2013,45(7):46-48.
[2]杨亿,李天祥,胡宏.硫酸钙晶须用途研究进展[J].广东化工,2014,41(21):96-97.
[3]李国勇,崔益顺,付凌杰.磷石膏制备硫酸钙晶须的条件研究[J].无机盐工业,2014,46(8):59-61.
[4]张军凯,郑志武,汪小伟,等.硫酸钙晶须改性聚四氟乙烯的摩擦磨损性能研究[J].塑料工业,2012,40(10):41-44.
[5]彭龙贵,张广成,杨莎.耐水型硫酸钙晶须的低温制备与结构表征[J].材料导报,2014,28(4):74-86.
[6]厉伟光,徐玲玲,戴俊.柠檬酸废渣制备硫酸钙晶须的研究[J].人工晶体学报,2005,34(2):323-327.
[7]朱利文.常压酸化法制备无水硫酸钙晶须工艺研究[D].山东:山东科技大学,2010.
[8]耿庆钰,李建锡,郑书瑞,等.磷石膏常压酸溶液法制备二水硫酸钙晶须[J].硅酸盐通报,2015,34(12):3731-3736.
[9]段博誉,杨水斌.硫酸钙晶须的制备及其影响因素[J].无机盐工业,2015,47(6):43-46.
[10]罗康碧.硫酸钙晶须的水热制备工艺及定向生长机理研究[D].云南:昆明理工大学,2011.
[11]Li Zhibao,Demopoulos G P.Solubility of Ca SO4phases in aqueous HCl+Ca Cl2solutions from 283 K to 353 K[J].Journal of Chemical and Engineering Data,2005,50(6):1971-1982.
[2]杨亿,李天祥,胡宏.硫酸钙晶须用途研究进展[J].广东化工,2014,41(21):96-97.
[3]李国勇,崔益顺,付凌杰.磷石膏制备硫酸钙晶须的条件研究[J].无机盐工业,2014,46(8):59-61.
[4]张军凯,郑志武,汪小伟,等.硫酸钙晶须改性聚四氟乙烯的摩擦磨损性能研究[J].塑料工业,2012,40(10):41-44.
[5]彭龙贵,张广成,杨莎.耐水型硫酸钙晶须的低温制备与结构表征[J].材料导报,2014,28(4):74-86.
[6]厉伟光,徐玲玲,戴俊.柠檬酸废渣制备硫酸钙晶须的研究[J].人工晶体学报,2005,34(2):323-327.
[7]朱利文.常压酸化法制备无水硫酸钙晶须工艺研究[D].山东:山东科技大学,2010.
[8]耿庆钰,李建锡,郑书瑞,等.磷石膏常压酸溶液法制备二水硫酸钙晶须[J].硅酸盐通报,2015,34(12):3731-3736.
[9]段博誉,杨水斌.硫酸钙晶须的制备及其影响因素[J].无机盐工业,2015,47(6):43-46.
[10]罗康碧.硫酸钙晶须的水热制备工艺及定向生长机理研究[D].云南:昆明理工大学,2011.
[11]Li Zhibao,Demopoulos G P.Solubility of Ca SO4phases in aqueous HCl+Ca Cl2solutions from 283 K to 353 K[J].Journal of Chemical and Engineering Data,2005,50(6):1971-1982.