降温速率对磷酸二氢铵介稳区影响的研究
|
摘要
采用聚焦光束反射测量(FBRM)技术测定了磷酸二氢铵溶液介稳区宽度。测定了不同降温速率下磷酸二氢铵溶液的成核温度,得到对应的磷酸二氢铵结晶介稳区宽度。结果表明:在降温速率一定时,磷酸二氢铵溶液过冷度随温度降低而增加,介稳区变宽;在不同降温速率下,介稳区宽度随降温速率增加而增加,其中降温速率为1.0℃/min时介稳区宽度最大,降温速率为0.2℃/min和0.1℃/min时介稳区宽度不变。
The technology of focused beam reflectance measurement(FBRM) was used to test the crystallization metastable zone width of the ammonium dihydrogen phosphate solution.By determination of the nucleation temperature of ammonium dihydrogen phosphate solution under different cooling rates,the ammonium dihydrogen phosphate′s metastable zone width data were obtained.Results showed that the supersaturated concentration and metastable zone width of ammonium dihydrogen phosphate solution increased along with the decrease of temperature under the same cooling rate.Under different cooling rates,ammonium dihydrogen phosphate metastable zone width increased with the increase of cooling rate,and the largest metastable zone width was generally at the cooling rate of 1.0 ℃/min.When the cooling rates were 0.2 ℃/min and 0.1 ℃/min,the width of metastable zone remained constant.
The technology of focused beam reflectance measurement(FBRM) was used to test the crystallization metastable zone width of the ammonium dihydrogen phosphate solution.By determination of the nucleation temperature of ammonium dihydrogen phosphate solution under different cooling rates,the ammonium dihydrogen phosphate′s metastable zone width data were obtained.Results showed that the supersaturated concentration and metastable zone width of ammonium dihydrogen phosphate solution increased along with the decrease of temperature under the same cooling rate.Under different cooling rates,ammonium dihydrogen phosphate metastable zone width increased with the increase of cooling rate,and the largest metastable zone width was generally at the cooling rate of 1.0 ℃/min.When the cooling rates were 0.2 ℃/min and 0.1 ℃/min,the width of metastable zone remained constant.
引文
[1]Luo J H,Li J,Yang J,et al.Study on Mg2+removal from ammonium dihydrogen phosphate solution by predispersed solvent extraction[J].Ind.Eng.Chem.Res.,2009,48:2056-2060.
[2]樊玉光,魏婷,华和维.降温速率对过硫酸铵结晶介稳区影响的研究[J].无机盐工业,2014,46(10):23-25.
[3]Qian Y Y,Lu G M,Sun Y Z,et al.Metastable zone width of Sr Cl2·6H2O during cooling crystallization[J].Cryst.Res.Technol.,2014,49(1):78-83.
[4]Lindenberg C,Mazzotti M.Effect of temperature on the nucleation kinetics of alpha L-glutamic acid[J].J.Cryst.Growth,2009,311(4):1178-1184.
[5]Sun X X,Sun Y Z,Yu J G.Cooling crystallization of aluminum sulfate in pure water[J].J.Cryst.Growth,2015,419:94-101.
[6]Buchanan G H,Winner G B.The solubility of mono-and diammonium phosphate[J].Ind.Eng.Chem.,1920,12(5):448-451.
[7]汤秀华,李军,周堃,等.磷酸二氢铵结晶介稳区宽度的研究[J].化工矿物与加工,2007(6):10-12.
[8]林晶,党亚固,费德君,等.磷酸二氢铵结晶介稳区的研究[J].无机盐工业,2007,39(10):21-23.
[9]党亚固,费德君,林晶,等.杂质对于磷酸二氢铵结晶的影响[J].四川大学学报:工程科学版,2010,42(1):98-101.
[2]樊玉光,魏婷,华和维.降温速率对过硫酸铵结晶介稳区影响的研究[J].无机盐工业,2014,46(10):23-25.
[3]Qian Y Y,Lu G M,Sun Y Z,et al.Metastable zone width of Sr Cl2·6H2O during cooling crystallization[J].Cryst.Res.Technol.,2014,49(1):78-83.
[4]Lindenberg C,Mazzotti M.Effect of temperature on the nucleation kinetics of alpha L-glutamic acid[J].J.Cryst.Growth,2009,311(4):1178-1184.
[5]Sun X X,Sun Y Z,Yu J G.Cooling crystallization of aluminum sulfate in pure water[J].J.Cryst.Growth,2015,419:94-101.
[6]Buchanan G H,Winner G B.The solubility of mono-and diammonium phosphate[J].Ind.Eng.Chem.,1920,12(5):448-451.
[7]汤秀华,李军,周堃,等.磷酸二氢铵结晶介稳区宽度的研究[J].化工矿物与加工,2007(6):10-12.
[8]林晶,党亚固,费德君,等.磷酸二氢铵结晶介稳区的研究[J].无机盐工业,2007,39(10):21-23.
[9]党亚固,费德君,林晶,等.杂质对于磷酸二氢铵结晶的影响[J].四川大学学报:工程科学版,2010,42(1):98-101.