载铁环烷酸-异辛醇-煤油体系异相水热反萃

Some factors effected on heterogeneous hydrothermal stripping from iron-loaded organic phase of naphthenic acid-isooctyl alcohol-kerosene,such as the concentrations of initial iron and naphthenic acid,the weight of"seed"of Fe2O3,temperature and time,were investigated.The process rate equation and the relation between stripping percent and time needed were established.The results showed the proces activation energy was 114 kJ·mol-1 and the heterogeneous hydrothermal stripping was controlled by the hydrolysis of naphthenic compound of iron.

集中式粉末钙源皂化稀土萃取有机相的工艺研究与工业应用

研究了采用粉末钙源直接皂化稀土萃取有机相。试验结果表明,用粉末钙源直接皂化P507有机相和环烷酸有机相,有机相皂化值分别达0.55 mol/L和0.72 mol/L,且外观清亮,流动性好。将钙皂有机相与氯化稀土料液进行萃取反应,P507有机相的分相时间为40 s,稀土负载量为0.19 mol/L;环烷酸有机相的分相时间为180 s,稀土负载量为0.19 mol/L。根据此试验数据开发了集中式粉末钙源直接皂化工艺,该工艺已经过多年工业化运行,结果表明,粉末钙源直接皂化P507有机相、环烷酸有机相,流动性好,分相快,对产品质量影响小,对有机相无长期不利影响;皂化成本只需液碱皂化的16.5%;由于皂化剂是粉末,无需制乳,与有机相直接发生皂化反应,与液碱皂化相比,废水大大减少,环保效益良好。