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Effects of impurity ions on solubility and metastable zone width of phosphoric acid

✍ Scribed by Yong Ma; Jiawen Zhu; Hongrui Ren; Kui Chen

Publisher
John Wiley and Sons
Year
2009
Tongue
English
Weight
332 KB
Volume
44
Category
Article
ISSN
0232-1300

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✦ Synopsis

Abstract

Effects of two typical impurity ions as Fe^2+^ and SO~4~^2–^ in phosphoric acid on solubility and metastable zone width (MZW) had been studied. It was shown that polythermal method was suitable for solubility measurement in this study. The solubility experimental data was correlated with a polynomial equation. Being compared with Fe^2+^, SO~4~^2–^ had a greater impact on the phosphoric acid solubility; and the variation in phosphoric acid MZW was just opposite. Phosphoric acid apparent secondary nucleation order was calculated to be 3.50 by means of modified regression method. And also the influence of impurity ions on apparent secondary nucleation order was investigated in this paper. (Β© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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