Enhancement of Metastable Zone of Some Aqueous Solutions

水溶液晶體成核介穩區之放大探討

N. P. Rajesh ； P. Santhana Raghavan ； P. Ramasamy ； 藍崇文(C. W. Lan)

《Journal of the Chinese Institute of Chemical Engineers》 33卷4期 (2002/07) Pp. 325-331

https://doi.org/10.6967/JCICE.200207.0325

摘要

本文探討許多水溶液系統成核，包括K2SO4, Na2CrO4‧4H2O, CuSO4‧5H2O, NaBr‧2H2O, NH4Cl, KNO2, NH4NO3, NaNO3, 介穩區受EDTA的影響。同時討論影響介穩區的因子，並計算成核參數。尤其，螯合劑、溫度及濃度的效應也一併討論。

並列摘要

The metastable zone width studies were carried out for various temperatures for supersaturated aqueous solutions of various inorganic materials K2SO4, Na2CrO4·4H2O, CuSO4·5H2O, NaBr·2H2O, NH4Cl, KNO2, NH4NO3, NaNO3 with pure and EDTA added solutions. The various factors affecting the metastable zone width are discussed and the critical nucleation parameters are calculated. The effect of temperature, chelating agent and the concentration of the solution are discussed.

並列關鍵字

Metastable zone ； Nucleation rate ； Chelating agent ； Heat of crystallization