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首页> 外文期刊>Solvent Extraction and Ion Exchange >The universal solvent extraction (unex) process.I.Development of the Unex Process solvent for the separation of cesium,strontium,and the actinides from acidic radioactive waste
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The universal solvent extraction (unex) process.I.Development of the Unex Process solvent for the separation of cesium,strontium,and the actinides from acidic radioactive waste

机译：通用溶剂萃取（unex）工艺。I.开发用于从酸性放射性废物中分离铯，锶和the系元素的Unex工艺溶剂

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摘要

A synergistic extraction mixture containing chlorinated cobalt dicarbollide (CCD), carbamoylmethyl phosphine oxide (CMPO), and polyethylene glycol (PEG) has been investigated for the simul- taneous recovery of cesium, strontium, lanthanides, and actinides from highly acidic media. The extraction properties of this mixture depend on the concentration ratio of the components. For recov- ery of all major radionuclides, the optimal ratio of [CCD]:[PEG]: [CMPO] = 5: 1: 1 should be used. The use of diphenyl-N,N- dibutylcarbamoylmethyl phosphine oxide and PEG-400 provides the most efficient recovery of cesium, strontium, lanthanides, and actinides. The possibility of using polyfluorinated ethers, esters, ketones, and sulfones as diluents was examined. Phenyltrifluo- romethyl sulfone was the most suitable diluent tested. The use of this diluent allaws good extraction properties, chemical and radia- tion stability, excellent explosion/fire-safety properties, and favor- able hydrodynamic characteristics. The extraction of radionuclides from HNO_3 media by mixtures of CCD:PEG:CMPO in phenyltri- fluoromethyl sulfone and the subsequent stripping behavior were evaluated.
机译：为了从高酸性介质中同时回收铯，锶，镧系元素和act系元素，已经研究了一种协同萃取混合物，该混合物包含氯化钴，二氨基甲酸钴（CCD），氨基甲酰基甲基氧化膦（CMPO）和聚乙二醇（PEG）。该混合物的萃取性能取决于组分的浓度比。为了回收所有主要的放射性核素，应使用[CCD]：[PEG]：[CMPO] = 5：1：1的最佳比例。二苯基-N，N-二丁基氨基甲酰基甲基氧化膦和PEG-400的使用可最有效地回收铯，锶，镧系元素和act系元素。研究了使用多氟化醚，酯，酮和砜作为稀释剂的可能性。苯基三氟甲基砜是最合适的稀释剂。这种稀释剂的使用具有良好的萃取性能，化学和辐射稳定性，优异的防爆/防火性能以及良好的流体动力学特性。通过在苯基三氟甲基砜中的CCD：PEG：CMPO混合物从HNO_3介质中提取放射性核素进行了评估。

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