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Application and method of neutral phosphamide extraction agent for extracting and separating thorium

A technology of phosphoramide and extractant, which is applied to the extraction and separation of thorium by neutral phosphoramide extractant, and the field of extraction and separation of thorium by neutral phosphoramide extractant, which can solve the problems of low capacity and low reuse rate, and achieve the extraction capacity. Strong, wide application range, cost-saving effect

Active Publication Date: 2014-11-05
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But above-mentioned method still has deficiency, as adopted neutral phosphine extractant load thorium capacity is relatively low (30% extractant is 40g / l to the load of thorium), and adopted neutral phosphine extractant is in strong acid The stability under conditions, although considerably improved compared to TBP, is still slightly insufficient, resulting in a lower reuse rate

Method used

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  • Application and method of neutral phosphamide extraction agent for extracting and separating thorium
  • Application and method of neutral phosphamide extraction agent for extracting and separating thorium
  • Application and method of neutral phosphamide extraction agent for extracting and separating thorium

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Embodiment

[0109] In order to further illustrate the solution of the present invention, specific examples of the present invention are provided to help those skilled in the art understand and implement the present invention, but the present invention is not limited to these examples.

[0110] Reagents and sources

[0111] Sulfonated kerosene (No. 260 kerosene) was purchased from Luoyang Aoda Chemical Co., Ltd.

[0112] P350, P204, P507, P229 and No. 3 aviation kerosene were purchased from Shanghai Laiyashi Chemical Co., Ltd.

[0113] Cyanex272 and Cyanex923 were purchased from Shanghai Cyanex Chemical Co., Ltd.

[0114] The feed liquid, washing liquid, and stripping agent were self-made in the laboratory, and other reagents (such as acids, etc.) were commercially available analytical reagents.

[0115] Product purity was determined by ICP-OES (instrument model: Optical-8000, manufacturer: Perkin Elmer).

[0116] The nuclear magnetic resonance instrument is Varian Mercury300.

[0117]...

preparation Embodiment 1 2

[0118] Preparation Example 1 The synthesis of diisooctyl-isooctyloxyphosphoramide

[0119]

[0120] For the synthesis method of diisooctyl-isooctyloxyphosphoramide, refer to Preparation Example 2 of Chinese Patent Application No. 201410040023.5. 1 H NMR spectrum (in CDCl 3 in) such as figure 1 shown.

preparation Embodiment 2 3

[0121] The synthesis of three (diisobutyl) phosphoramides of preparation example 2

[0122]

[0123] Take 9.3ml of phosphorus oxychloride, add 100ml of dichloromethane as diluent, slowly add 106ml of diisobutylamine in the ice-salt bath, control the temperature below 5°C during the whole process, after the addition, react for 5 hours, and depressurize The hydrochloric acid gas was pumped out, and the reaction was carried out at room temperature for 12 hours; the obtained reaction product was washed with water until it was nearly neutral, and the dichloromethane was removed by rotary evaporation to obtain the desired tris(diisobutyl)phosphoramide. 1 H NMR spectrum (in CDCl 3 in) such as figure 2 shown.

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Abstract

The invention relates to a thorium separation and purification method and in particular relates to an application of a neutral phosphamide extraction agent shown as a general formula I in the specification for extracting and separating thorium, as well as a method for extracting and separating thorium by using the neutral phosphamide extraction agent.

Description

technical field [0001] The invention relates to a method for separating and purifying thorium, more specifically, to a use of a neutral phosphoramide extractant for extracting and separating thorium and a method for extracting and separating thorium using the neutral phosphoramide extractant. Background technique [0002] Thorium is one of the actinides and is a radioactive element. After neutron bombardment, uranium-233 can be obtained, so it is a potential nuclear fuel. At present, China's proven thorium reserves are about 280,000 to 300,000 tons, ranking first in the world, and most of them are associated with rare earth resources. However, currently in China, the utilization rate of thorium is almost zero, and a large amount of thorium enters the slag and tailings with the mining of rare earths, causing great environmental pollution and waste of resources. [0003] The early thorium separation process used tributyl phosphate (TBP) as the extractant to extract and separa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/38C22B60/02
CPCY02P10/20
Inventor 廖伍平李艳玲张志峰卢有彩
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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