Crystallization Process of Sodium Aluminate Enhanced by Ultrasonic Wave
SUN Wen-le ZHANG Yang, MA Shu-hua WANG Yue-jiao DING Jian TANG Zhen-hua ZHENG Shi-li
Key Laboratory of Green Process and Engineering, Institute of Process Engineering, CAS Institute of Process Engineering, Chinese Academy of Sciences Key laboratory of Green Process and Engineering, Institute of Process Engineering, CAS (1. Key laboratory of Green Process and Engineering, Institute of Process Engineering, CAS Beijing University of Technology, Metallurgical and Ecological Engineering Institute of Process Engineering, Chinese Academy of Sciences
Abstract：The effects of ultrasonic frequency and power on the crystallization efficiency and morphology of sodium aluminate crystal were examined, and the optimum process conditions obtained: crystallization temperature 60℃, ultrasonic frequency 45 kHz and power 100 W. At these conditions, the crystalline product was monosodium aluminate hydrate (4NaAlO2×5H2O), the crystal morphology had flaky, eight-face, irregular and other forms. Ultrasound could significantly shorten the crystallization induction period by 66%, the conductivity of the solution increased 1.5 times, and the SiO2 concentration decreased to 5 g/L.
2013, Vol. 13 
