In response to the problems of limited variety, low purity, and difficulty in deep purification and impurity removal of domestic high-end rare earth oxide and halide reagents, a systematic study was conducted on the mass transfer mechanism of key impurity elements in the deep purification and impurity removal process of rare earth oxide, as well as the deep purification and impurity removal technology, to form a kilogram scale preparation capability.

    1. A new type of ion exchange separation system capable of applying external fields (temperature field, force field, etc.) has been developed, with ytterbium oxide as the research target. The resin characteristics, feed flow rate and concentration during the loading and rinsing process of purifying ytterbium oxide by ion exchange separation method have been investigated pH、 The regulation rules of separation coefficients between rare earth elements under different institutional conditions such as temperature and pressure have clarified the ion exchange characteristics between different rare earth elements, especially between adjacent rare earth elements, achieving deep removal of rare earth impurities.

    2. Two key sensitive impurity removal technologies have been developed based on different new modified adsorption materials. The high selective adsorption ability of the adsorption materials for impurity elements such as Co, Ni, Mn, Th, and U is coupled with the competitive complexation effect of chelating agents on metal elements to achieve directional removal of key sensitive impurities. By comparing the directional impurity removal performance of adsorption materials through static and dynamic column adsorption/desorption test systems, key sensitive impurity removal technologies have been broken through, achieving directional removal of sensitive impurities (Co, Ni, Mn, Th, U, etc.).

    3. The system investigated the occurrence behavior and mechanism of alkaline earth metal impurities such as calcium and magnesium, as well as acid ion (Cl -, NO3-, and other anions) impurities during the precipitation process. Based on this, the influence of different precipitants and dosages on impurity removal was investigated, and the process parameters of the precipitation process were further optimized. Finally, the development and optimization of efficient precipitation impurity removal technology were breakthrough, and the purity of rare earth reagents was improved.

    4. Based on laboratory preparation processes, further exploration of kilogram scale preparation processes was carried out, and the construction and commissioning of five kilogram scale production lines for rare earth oxide reagents were completed. Five high-purity rare earth oxide reagent kilogram scale processes were developed, and kilogram scale process documents were established. The purity and radioactive indicators of kilogram scale products met the requirements.

    Due to the special nature of rare earth materials, this dataset is not publicly available and only shares metadata. To obtain the entity of the dataset, please contact the data manager.