Determination of the Particle Size Distribution of Metatitanic Acid by Photon Correlation Spectroscopy
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摘要: 采用光子相关光谱法测定硫酸钛白工艺中水解偏钛酸的粒度分布，研究了不同分散方法和测试条件对测定结果的影响。通过研究分散介质、分散剂及其用量，偏钛酸用量，超声分散时间及稳定时间等分散方法和测试条件，得到光子相关光谱法测定偏钛酸粒度分布的适宜分散条件。试验结果表明：采用蒸馏水为分散介质，分散剂六偏磷酸钠浓度为0.05%，50 mL分散水解偏钛酸浆料0.044 g左右，超声分散5 min后立即测定其粒度分布，此为光子相关光谱法测定水解偏钛酸粒度的最佳分散测试条件。Abstract: In order to measure the particle size distribution(PSD) of metatitanic acid slurry, hydrolyzed from sulfate titanium dioxide process, the influencing factors of dispersion methods and measurement conditions on the PSD of metatitanic acid were investigated by photon correlation spectroscopy(PCS).Dispersion medium, dispersant and its dosage, metatitanic acid dosage, ultrasonic dispersion time and stabilization time were studied to determine the optimum dispersion condition.The results showed that the optimum dispersion condition for the measurement of the particle size distribution of hydrated metatitanic acid by PCS is using distilled water as dispersion medium, 50 mL sodium hexametaphosphate of 0.05% as dispersant, hydrolyzed metatitanic acid about 0.044 g, and then measuring the PSD immediately after ultrasonic dispersion time 5 min.
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