## Abstract

In this work, the effect of temperature on the crystal growth rate of potassium sulfate in aqueous K
_{2}
SO
_{4}
and KCl-K
_{2}
SO
_{4}
solutions is analyzed. The crystal growth rate equation of K
_{2}
SO
_{4}
is developed on the basis of the difference of chemical potentials of K
_{2}
SO
_{4}
at the solid-liquid interface. The Lu-Maurer model is used to predict the activity coefficient of K
_{2}
SO
_{4}
. The crystal growth rate of K
_{2}
SO
_{4}
in aqueous K
_{2}
SO
_{4}
solution decreases, then increases with increasing temperature, and reaches its lowest value around 303.15 K, which is in accordance with previous experimental results. Meanwhile, the optimal crystallization temperature of K
_{2}
SO
_{4}
in aqueous KCl-K
_{2}
SO
_{4}
solution is discussed. An effective method is found to increase the yield of K
_{2}
SO
_{4}
by increasing the crystallization temperature to 333.15 K.

Original language | English |
---|---|

Pages (from-to) | 6266-6271 |

Number of pages | 6 |

Journal | Industrial and Engineering Chemistry Research |

Volume | 45 |

Issue number | 18 |

DOIs | |

Publication status | Published - 1 Aug 2006 |