摘要
二氧化碳碳分法制备氧化铝过程中间产物氢氧化铝含有杂质钠,影响最终产物氧化铝的纯度、性能。选择盐酸溶液为脱钠剂,酸洗脱除碳分产物中的杂质钠。结果表明:氢氧化铝煅烧为γ-氧化铝有利于钠的脱除,在最优条件超声波功率150 W、酸洗温度60℃、时间35 min、初始酸浓度0.5 mol/L下,氧化铝中钠含量降低为0.00415%。超声波辅助酸洗可实现碳分产物中钠的大幅度脱除。
In the process of preparing alumina by carbon dioxide carbonation,the intermediate product aluminum hydroxide contains impurity sodium,which affects the purity and properties of the final product alumina.Hydrochloric acid solution was used as sodium remover to remove impurity sodium from carbon products by acid pickling.The results showed that calcination of aluminum hydroxide toγ-alumina was beneficial to sodium removal.Under optimal conditions of ultrasonic power 150 W,temperature 60℃,pickling time 35 min,initial acid concentration 0.5 mol/L,the sodium content in alumina was reduced to 0.00415%.Ultrasonic assisted pickling remove sodium from carbonation products greatly.
作者
袁杰
刘遇萍
王金涛
Yuan Jie;Liu Yuping;Wang Jintao(School of Chemistry and Materials Engineering,Liupanshui Normal University,Liupanshui 553004,China)
出处
《山东化工》
CAS
2022年第13期28-30,共3页
Shandong Chemical Industry
关键词
高纯氧化铝
脱钠
酸洗
超声波
high purity alumina
sodium removal
acid pickling
ultrasonic
