正交试验法优化柠檬酸法氧化铝生产工艺  

Orthogonal Optimized Synthesis of Dawsonite from Aluminum Citrate

作　　者：陈咏梅[1] 朱军利[2] 余章龙[1] 万平玉[1] 

机构地区：[1]北京化工大学理学院,北京100029 [2]西北化工研究院,西安710600

出　　处：《应用化学》2012年第1期84-89,共6页Chinese Journal of Applied Chemistry

基　　金：中央高校自主创新资助项目(JD0907)

摘　　要：采用正交试验设计法,以丝钠铝石的收率为指标,考察了碳酸氢钠用量、pH值、反应温度和反应时间等因素对柠檬酸法氧化铝生产工艺的影响。在优选工艺条件下:NaHCO3与Al摩尔比为5,pH=11,反应温度为80℃,反应时间为3 h,柠檬酸铝至丝钠铝石的转化率从原有的65%提高至76%。The conversion of aluminum citrate （AlCit） to dawsonite is the key step to the alumina process named ＂AlCit-dawsonite-alumina＂. The reaction conditions including the dosage of sodium bicarbonate, pH, reaction temperature and reaction time, were found to be related to the conversion of AlCit. Orthogonal experimental design was employed to optimize the reaction conditions. About 76% of AlCit was conversed to dawsonite under the optimized conditions ： NaHCO3/Al molar ratio of 5, pH of 11, temperature of 80 ℃ and reaction time of 3 h, comparing to 65% obtained under preliminary experimental conditions.

关 键 词：正交试验法 柠檬酸铝 丝钠铝石 氧化铝 

分 类 号：O611[理学—无机化学]