探究了含镁铝杂质硫酸氧钛溶液[1.0 mol/L TiOSO₄+0.5 mol/L MgSO₄+0.25 mol/L Al₂（SO₄）₃+2.4 mol/L H₂SO₄]的水热水解规律。热力学计算表明：110~150 ℃,加入MgSO₄ 和Al₂（SO₄）₃的总体效应使钛的理论水解率略有降低[150 ℃时,纯硫酸氧钛溶液和含镁铝杂质硫酸氧钛溶液的理论水解率分别为99.8%和99.7%,镁铝杂质分别以MgSO_4（aq）和Al（OH）²⁺为主];升高温度有利于含钛组分水解,从110 ℃升高到150 ℃含镁铝杂质硫酸氧钛溶液的理论水解率由99.1%升高到99.7%。实验结果表明：加入MgSO₄ 和Al₂（SO₄）₃后钛水解率略有降低（150 ℃时,纯硫酸氧钛溶液和含镁铝杂质硫酸氧钛溶液的水解率分别为99.2%和98.3%）,升高温度可显著强化含镁铝杂质硫酸氧钛溶液的水解（110 ℃→150 ℃,68.6%→98.3%）,与热力学计算结果相符。在150 ℃水热反应10 h,可制得原始粒径为100~300 nm、团聚粒径为1~3 μm的不规则状偏钛酸,含钛组分水解率达到98.3%。

The rule of hydrothermal hydrolysis of impurity-bearing titanyl sulfate solution containing [1.0 mol/L TiOSO₄+0.5 mol/L MgSO₄+0.25 mol/L Al₂（SO₄）₃+2.4 mol/L H₂SO₄] was studied.Thermodynamic analysis indicated that the presence of MgSO₄ and Al₂（SO₄）₃ （Mg/Al impurities mainly as MgSO_4（aq） and Al（OH）²⁺ at 110~150 ℃） led to the slight decrease of the theoretical hydrolysis ratios of titanium-bearing spices（150 ℃,99.8%→99.7%）,while the increase of temperature favored the hydrolysis of Ti-bearing spices,from 110 ℃ to 150 ℃ leading to the increase of the theoretical hydrolysis ratio of titanium-bearing spices from 99.1% up to 99.7%.The experimental research indicated that the presence of MgSO₄ and Al₂（SO₄）₃ led to the slight decrease of the hydrolysis of Ti-bearing spices（150 ℃,99.2%→98.3%）,and the increase of temperature favored the hydrolysis of Ti-bearing spices（110→150 ℃,68.6%→98.3%）,which was in good agreement with the thermodynamic analysis results.The agglomerated metatitanic acid particles（with a particle size of 1~3 μm） composed of the small primary particles（with a particle size of 100~300 nm） formed and the corresponding hydrolysis ratio of Ti-bearing spices reached up to 98.3% after treating the impurity-bearing titanyl sulfate solution at 150 ℃ for 10 h.