Preparation and use of hydroxyl oximated calix[6]arene efficient uranium extractant

Abstract

The invention discloses a synthetic method of hydroxyl oximated calix[6]arene suitable for efficient uranium extraction. The synthetic method is completed by two steps: firstly, performing reaction between calix[6]arene and ethyl bromoacetate under the catalytic effect of anhydrous potassium carbonate to obtain a calix[6]arene ethyl acetate derivative; and secondly, performing reaction between the calix[6]arene ethyl acetate derivative and hydroxylamine hydrochloride under the catalytic effect of potassium hydroxide to obtain hydroxyl oximated calix[6]arene. The method is simple and convenient in synthetic line, mild in reaction condition and easy to control and realize; and synthesized hydroxyl oximated calix[6]arene has efficient extraction performance and selective complexation performance to uranium and has wide application prospect in uranium separation, uranium-bearing wastewater treatment and uranium recovery.

Description

technical field [0001] The invention belongs to the field of organic oligomer materials, and in particular relates to the synthesis of calixarene derivatives suitable for high-efficiency extraction of uranium. Background technique [0002] With the rapid development of nuclear power in my country, the demand for uranium is increasing year by year. At present, the domestic production capacity of natural uranium can only meet 1 / 3 of the demand, and the supply of uranium is under great pressure. However, a large amount of waste liquid produced by uranium mining and metallurgy and low content of uranium in waste water pose a threat to the ecological environment, and the existing treatment technology cannot fully recover uranium in such waste water and waste liquid. In order to improve the utilization rate of uranium resources, ensure the uranium supply for nuclear power development, promote the clean production and environmental protection of uranium mining and metallurgy, it is...

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Problems solved by technology

According to the published literature reports, the synthetic routes of calixarene hydroxime derivatives are either complicated, or the reaction time is long and the reaction conditions are harsh.

For example, the synthesis method of calixarene-hydroxamic acid disclosed in Document 1 (Sichuan University 2003 master's degree thesis "Design and Synthesis of Calixarene-Hydroxamic Acid and the Enzyme-like Function of Transition Metal Complexes") uses four One-step or five-step synthetic route, there are many reaction parameters that need to be controlled; Document 2 (Yangzhou University 2005 Master's Degree Thesis "Synthesis of Calixarene Amide Derivatives-Research on Properties and Coordination Reaction") discloses calixarene hydroxamic acid In the synthetic method of derivatives, although there are only two steps, the reaction time of the first step and the second step are as long as 5 days, and the second step reaction needs to be completed in an ice bath.

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