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Method for carrying out extraction separation on zirconium and hafnium by bisphosphate extraction agent

An extraction agent, bisphosphoric acid technology, applied in the field of extraction and separation of zirconium and hafnium with new bisphosphoric acid extraction agent, can solve the problems of low extraction rate of zirconium and hafnium, poor separation effect, environmental pollution, etc., achieve high extraction rate, low pollution, Simple operation effect

Active Publication Date: 2020-02-04
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The novel bisphosphoric acid extractant N,N-n-octylamine di(methylene phenylphosphinic acid) used in this patent has a strong extraction ability to zirconium and hafnium under low acidity to high acidity, and has a certain effect on zirconium Recognition ability to solve problems such as low extraction rate of zirconium and hafnium, poor separation effect, environmental pollution, and high cost

Method used

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  • Method for carrying out extraction separation on zirconium and hafnium by bisphosphate extraction agent
  • Method for carrying out extraction separation on zirconium and hafnium by bisphosphate extraction agent
  • Method for carrying out extraction separation on zirconium and hafnium by bisphosphate extraction agent

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Effect test

Embodiment 1

[0024] Prepare solutions with zirconium and hafnium ion concentrations of 1 g / L and 0.02 g / L, and acidity of 0.01 mol / L as the water phase. With chloroform as the diluent, 0.005 mol / L N,N-n-octylamine bis (methylene phenyl hypophosphorous acid) was prepared as the organic phase.

[0025] The organic phase and the aqueous phase were mixed in a volume ratio of 1:1, the extraction temperature was controlled to 20°C, and after shaking for 5 minutes, the phase was separated by a centrifuge. The concentration of metal ions in the water phase is detected, and the organic phase is stripped with deionized water at 30°C. The stripping rate is as high as 99%.

[0026] The specific experimental parameters and extraction and separation performance are shown in Table 1.

Embodiment 2

[0028] The solutions of zirconium and hafnium ion concentrations of 1 g / L and 0.02 g / L and acidity of 1 mol / L were prepared as the water phase. With chloroform as the diluent, 0.005 mol / L N,N-n-octylamine bis(methylene phenyl hypophosphorous acid) was prepared as the organic phase.

[0029] The organic phase and the aqueous phase are mixed in a volume ratio of 1:1, the extraction temperature is controlled at 30°C, and after shaking for half an hour, the phase is separated by a centrifuge. Detect the concentration of metal ions in the water phase and use deionized water to strip the organic phase at 30°C. The stripping rate is as high as 99%.

[0030] See Table 1 for specific experimental parameters and extraction and separation performance.

Embodiment 3

[0032] Prepare solutions with zirconium and hafnium ion concentrations of 1 g / L and 0.02 g / L, and acidity of 3 mol / L as the water phase. With chloroform as the diluent, 0.005 mol / L N,N-n-octylamine bis (methylene phenyl hypophosphorous acid) was prepared as the organic phase.

[0033] The organic phase and the aqueous phase were mixed in a volume ratio of 1:1, the extraction temperature was controlled to 50°C, and after shaking for one hour, the phase was separated by a centrifuge. Detect the concentration of metal ions in the water phase and use deionized water to strip the organic phase at 30°C. The stripping rate is as high as 99%.

[0034] The specific experimental parameters and extraction and separation performance are shown in Table 1.

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Abstract

The invention discloses a method for carrying out extraction separation on zirconium and hafnium by virtue of a novel bisphosphate extraction agent N,N-n-octylamine di(methylene phenylhypophosphoric acid), and having an extraction rate which far exceeds the extraction rate of a common acidic organophosphorus extraction system, and mainly solves the problems of low extraction rate for zirconium andhafnium, and poor separation effect. N,N-n-octylamine di(methylene phenylhypophosphoric acid) has a great extraction effect on zirconium and hafnium under different acidities, and zirconium is preferentially extracted. Zirconium ions and hafnium ions are recovered through reverse extraction, the reverse extraction rate is up to 99% and above, and an organic phase can be repeatedly utilized. The technology is high in extraction rate, good in separation effect, less in pollution, low in cost, and capable of being used for the industrial production of separation for zirconium and hafnium.

Description

Technical field [0001] The invention belongs to the technical field of extraction and separation of zirconium and hafnium, and specifically relates to a method for extracting and separating zirconium and hafnium by using a new bisphosphonic acid extractant. Background technique [0002] With the excessive consumption of coal, oil, natural gas and other traditional fossil energy sources, and the negative impact of burning fossil fuels on the living environment of human beings increasingly apparent, nuclear energy has become an indispensable new type with many advantages such as environmental protection, economy, and safety. Alternative energy sources have developed rapidly and matured in recent decades. Zirconium and hafnium are two extremely important metal materials in the nuclear industry. Zirconium has a small thermal neutron absorption cross-section (0.18b) and good corrosion resistance. It is used for the cladding and structural materials of the reactor and is the first saf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B34/14C22B3/38
CPCC22B34/14C22B3/3842Y02P10/20
Inventor 崔玉赵嘉琳赵奕铭
Owner UNIV OF JINAN
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