一种从钍盐中提取高丰度212Pb的方法
By combining Pb and Th selective adsorption resin columns with anion exchange resin, the problem of high 208Pb content in existing technologies has been solved, and high-abundance 212Pb extraction has been achieved, avoiding heavy metal poisoning and reducing costs.
CN122399561APending Publication Date: 2026-07-17NANHUA UNIV +1
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- NANHUA UNIV
- Filing Date
- 2026-06-16
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
Existing technologies for extracting 212Pb from thorium salts suffer from problems such as high content of stable 208Pb nuclides, which affects drug labeling efficiency and may cause heavy metal poisoning, and the separation cost is also high.
Method used
Using Pb-selective adsorption resin columns and Th-selective adsorption resin columns, combined with anion exchange resin and APA resin, the high abundance of 212Pb was separated and extracted, and the content of 208Pb was reduced through multiple adsorption, elution and desorption steps.
Benefits of technology
It achieved the extraction of high-abundance 212Pb, reduced the content of 208Pb, avoided the risk of heavy metal poisoning, improved drug labeling efficiency, and reduced separation costs.
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Figure CN122399561A_ABST
Abstract
本发明属于医用同位素分离制备领域，具体涉及一种从钍盐中提取高丰度212Pb的方法，包括如下步骤：1）将含有钍盐的氢卤酸溶液通过Pb选择性吸附树脂柱，所述Pb选择性吸附树脂柱中的填料为阴离子交换树脂；2）将过柱后的钍溶液密封保存0.5‑5天；3）将密封保存后的钍溶液通过Pb选择性吸附树脂柱，所述Pb选择性吸附树脂柱中的填料为阴离子交换树脂；4）依次将淋洗液和硝酸解吸液通过上述步骤3）中的Pb选择性吸附树脂柱，得到含有Pb的硝酸解吸液；5）含有Pb的硝酸解吸液通过Th选择性吸附树脂柱，得到高丰度212Pb，本发明方法简单，在保证活度的情况下，可以有效提高212Pb的丰度。
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Citation Information
Patent Citations
Method for extracting lead-212 and bismuth-212 from thorium-232 decay chain
CN119120899A
Method for separating and purifying 212Pb from thorium solution
CN121944786A