Use and method of amino-containing neutral phosphine extractant for extracting and separating uranium
An extractant and neutral phosphine technology, which is applied in the field of amino-containing neutral phosphine extractant, extraction and separation of uranium, and can solve the problems of poor separation performance
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Embodiment 1
[0084] Preparation of the organic phase: Mix 3L of 1-(2-ethylhexylamino)methyl bis(2-ethylhexyl)phosphonate with 7L of aviation kerosene to prepare the organic phase.
[0085] The feed liquid is a sulfuric acid solution of 0.05mol / L uranium, and its acidity is 1.5mol / L.
[0086] The washing solution is 0.5mol / L sulfuric acid solution.
[0087] The stripping agent is 0.3mol / L ammonia solution.
[0088] A 250ml mixed-clarified extraction tank was used for extraction and separation experiments. First, 6-stage countercurrent extraction is carried out, and the flow ratio of the organic phase to the feed liquid is 10mL / min: 20mL / min to obtain the uranium-containing extract and uranium-extracted tail liquid. Then carry out 2-stage countercurrent washing, the flow ratio of uranium-containing extract and washing liquid is 10mL / min: 5mL / min. Then carry out 4-stage countercurrent stripping, the flow ratio of uranium-containing extract solution and stripping agent is 10mL / min: 3.5mL / mi...
Embodiment 2
[0090] Preparation of the organic phase: Mix 3L of 1-(2-ethylhexylamino)-ethylphosphonic acid bis(2-ethylhexyl) with 7L of aviation kerosene to prepare the organic phase.
[0091] The feed liquid is 0.5mol / L uranium hydrochloric acid solution, and its acidity is 1.0mol / L.
[0092] The washing solution is 0.5mol / L hydrochloric acid solution.
[0093] The stripping agent is 6mol / L hydrochloric acid solution.
[0094] A 250ml mixed-clarified extraction tank was used for extraction and separation experiments. First, 6-stage countercurrent extraction is carried out, and the flow ratio of the organic phase to the feed liquid is 10mL / min: 2mL / min to obtain the uranium-containing extraction liquid and the uranium extraction tail liquid. Then carry out 2-stage countercurrent washing, the flow ratio of the uranium-containing extraction solution and the washing solution is 10mL / min: 2mL / min. Then carry out 4-stage countercurrent back extraction, the flow ratio of the uranium-containin...
Embodiment 3
[0096] Preparation of the organic phase: Mix 2L of 1-(2-ethylhexylamino)1-ethylethylphosphonic acid bis(2-ethylhexyl), 1LCyanex 923 and 7L of aviation kerosene to prepare the organic phase.
[0097] The feed liquid is a nitric acid solution of 0.1mol / L uranium, and its acidity is 1.0mol / L.
[0098] The washing solution is 1.0mol / L nitric acid solution.
[0099] The stripping agent is 0.01mol / L nitric acid aqueous solution.
[0100] A 250ml mixed-clarified extraction tank was used for extraction and separation experiments. Firstly, 5-stage countercurrent extraction is carried out, and the flow ratio of the organic phase to the feed liquid is 10mL / min: 20mL / min to obtain the uranium-containing extraction liquid and the uranium extraction tail liquid. Then carry out 3-stage countercurrent washing, the flow ratio of the uranium-containing extraction solution and the washing solution is 10mL / min: 5mL / min. Then carry out 10 stages of countercurrent stripping, the flow ratio of th...
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