A kind of phosphine oxide modified pillar [5] arene derivative and its application

Abstract

The invention relates to a phosphine oxide-modified pillar (5) arene derivative and an application thereof, belonging to the technical field of selective separation and extraction agents for thorium (IV) and uranium (VI) from rare earth elements. The phosphine oxide-modified pillar (5) arene derivative is diphenyl phosphine oxide-substituted pillar (5) arene, is used as an extraction agent for selectively separating thorium and uranium from rare earth elements, and can realize the selective separation of uranium to thorium in actinide elements to a certain extent. The extraction agent, namely the phosphine oxide-modified pillar (5) arene in the invention has the advantages of single composition, good chemical stability, simple synthesis and easiness in obtainment, and is suitable for industrial production; furthermore, the using quantity of the extraction agent is low, and the thorium and the uranium can be selectively separated from the rare earth elements under high acidity; and in addition, the extraction agent further has the advantages of high extraction speed, high phase splitting speed and the like. The product disclosed by the invention has great economic benefits and practical application prospects.

Description

technical field [0001] The present invention relates to a class of pillar [5] arene derivatives and applications thereof, more specifically, the present invention relates to a phosphine oxide modified pillar [5] arene derivatives and applications thereof, which belong to rare earth elements and thorium (IV) and Uranium (Ⅵ) selective separation extraction agent technical field. Background technique [0002] The energy problem is one of the most severe challenges facing the world today. Low-carbon products are related to the sustainable development of society, economy and environment. Compared with other energy sources, nuclear energy has many advantages such as high efficiency, cleanness and high energy. Thorium and uranium belong to the actinides, which are the basic source of nuclear fuel and play an important role in nuclear chemistry. For example, the widely used thermal neutron reactor is based on 235 U is the fuel, and 232 Th can be produced by neutron bombardment 23...

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Problems solved by technology

[0007] The invention aims to solve the problems of large consumption, low extraction capacity, weak selectivity and slow extraction speed when the existing extractant selectively separates thorium and uranium from rare earth elements, and provides a phosphine oxide modified column [ 5] arene derivatives, the present invention uses pillar[5]arenes as a pre-organization platform, introduces phosphine oxides with coordination groups onto pillar[5]arenes, and utilizes the chelation of its multifunctional groups to achieve rare earth Selective separation of thorium and uranium ions in elements, as an extractant, it can efficiently and selectively separate thorium and uranium from rare earth ions under relatively acidic conditions

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