Title:
TRIVALENT ACTINIDES AND LANTHANIDES, AND TRIVALENT ACTINIDE INTEGRATED EXTRACTION AND SEPARATION METHOD AND SYSTEM
Document Type and Number:
WIPO Patent Application WO/2023/131068
Kind Code:
A1
Abstract:
The present invention relates to trivalent actinides and lanthanides, and a trivalent actinide integrated extraction and separation method. The method comprises: adjusting a pH value of a solution containing trivalent lanthanide and actinide ions to a suitable value, the actinide ions comprising americium ions and curium ions, adding an aqueous phase complexing agent, then enabling the solution to be in contact with an extractant organic phase containing alkyl dithiophosphonic acid and a nitrogen-containing reagent, extracting the actinide ions into the organic phase, and washing, by using an aqueous phase having a certain pH value, a loaded organic phase containing the actinide ions; reversely extracting the loaded organic phase by using the aqueous phase having a certain pH value, and reversely extracting the curium ions into the aqueous phase, so as to implement americium and curium separation; and then enabling the organic phase to be in contact with a dilute nitric acid solution, and reversely extracting the americium ions in the organic phase into the aqueous phase. According to the present invention, a separation factor of americium and curium can be significantly increased, and an operating pH value is reduced. Moreover, in a same system, by means of extraction and segmented washing, mutual separation of the trivalent actinides and lanthanides and the trivalent actinide ions are implemented at the same time, thereby simplifying a separation operating process and improving separation efficiency.
Inventors:
ZHU LIYANG (CN)
FANG TUO (CN)
GUO QILING (CN)
HAO XUAN (CN)
LIU QIAN (CN)
ZHOU JIN (CN)
YANG SULIANG (CN)
TIAN GUOXIN (CN)
FANG TUO (CN)
GUO QILING (CN)
HAO XUAN (CN)
LIU QIAN (CN)
ZHOU JIN (CN)
YANG SULIANG (CN)
TIAN GUOXIN (CN)
Application Number:
PCT/CN2022/143836
Publication Date:
July 13, 2023
Filing Date:
December 30, 2022
Export Citation:
Assignee:
CHINA INST OF AMOMIC ENERGY (CN)
International Classes:
C22B60/02; C22B3/40; C22B7/00
Foreign References:
| CN114525419A | 2022-05-24 | |||
| CN107958717A | 2018-04-24 | |||
| CN102549176A | 2012-07-04 | |||
| CN102471824A | 2012-05-23 | |||
| US5966584A | 1999-10-12 | |||
| CN104894372A | 2015-09-09 | |||
| CN109517992A | 2019-03-26 | |||
| JP2002001007A | 2002-01-08 | |||
| CN107177744A | 2017-09-19 |
Attorney, Agent or Firm:
BEIJING TIANYUE GIP LAW FIRM (CN)
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