从废石油裂解催化剂中回收稀土试验研究  

Recovery of Rare Earth From Spent Petroleum Cracking Catalyst

作　　者：卢国俭[1] 邹翔[1] 朱英杰[1] 胡振宇[1] 

机构地区：[1]连云港师范高等专科学校,江苏连云港222006

出　　处：《湿法冶金》2016年第6期498-502,共5页Hydrometallurgy of China

基　　金：2015年江苏省连云港市产业前瞻重点研发项目(SH1505)

摘　　要：研究了从粒度小于20gm、污染较重、不适宜复活的废催化剂中回收稀土。试验结果表明：控制浸出温度60℃、盐酸浓度3．33mol／L、浸出时间3h，废催化剂中91．3％～94．5％的镧、铈被浸出；用50％P507＋50％磺化煤油，在温度25℃、萃取相比Uo：Va=2：1、萃取时间30min条件下从稀土浸出液中萃取镧铈，镧铈萃取率为94．5％；对负载有机相，采用1.8mol／L盐酸反萃取，控制相比Uo：Va=1：3，稀土镧铈的反萃取率为98．1％；对反萃取液用草酸进行沉淀，沉淀物灼烧，获得工业级氧化镧铈产品。Recovery of rare earth from heavily polluted spent catalyst with granularity of 〈20 μm which was not suitable for regeneration was studied. Experiment results show that the total leaching rate of lanthanum and cerium is between 91. 3% and 94. 5% under the conditions of leaching temperature of 60℃, hydrochloric acid concentration of 3. 33 mol/L, leaching time of 3 h. For rare earth in the leaching solution,using 50%P507＋50%kerosene as extractant to solvent extract,under the conditions of temperature of 25 ℃ ,phase ratio of 2 ： 1,extracting time of 30 rain,the extract rate is up to 94.5%. Then using hydrochloric acid of 1.8 mol/L to back-extract, under the phase ratio of 1 ： 3, the recovery rate of lanthanum and cerium is 98.1%. Industrial product of lanthanum and cerium can be obtained by oxalic acid sedimentation and roasting.

关 键 词：废石油裂解催化剂 镧铈 浸出 萃取 回收 

分 类 号：X742[环境科学与工程—环境工程] TF845.6[冶金工程—有色金属冶金]