High-stability uranium purification and extraction method

• Main Authors: CAO LINGHUA, NIU YUQING, ZHOU ZHIQUAN, KANG SHAOHUI, ZHAO FENGQI, SHU ZUJUN, YE KAIKAI, CAO XIAOHAO, ZHANG YONGMING, REN YAN
• Format: Patent
• Language: Chinese; English
• Published: 11.04.2023
• Subjects: CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention relates to the field of uranium purification processes, in particular to a high-stability uranium purification and extraction method. The method comprises the following steps: preparing a uranium ore concentrate nitric acid solution into an extraction stock solution, performing counter-current extraction on one part of the extraction stock solution, and performing re-extraction on the other part of the extraction stock solution by using an organic phase generated by the counter-current extraction; re-extraction residues generated by re-extraction are mixed with the uranium ore concentrate salpeter solution to prepare an extraction stock solution, one part of the extraction stock solution is returned for re-extraction, and the other part of the extraction stock solution is returned for multi-stage or continuous counter-current extraction; the organic phase subjected to counter-current extraction sequentially enters re-extraction in a counter-current manner to serve as an organic phase for re-extr