Macroporous ion exchange resin with function of highly selectively adsorbing rhenium metal ions and preparation method of macroporous ion exchange resin

Abstract

The invention relates to a preparation method of a macroporous ion exchange resin capable of highly selectively adsorbing rhenium metal ions. According to the invention, gradient pore-forming is carried out by adopting a multi-element pore-forming agent, so that the pore channel structure is improved, the ion exchange resistance is reduced, and the ion exchange rate is increased. Glutaraldehyde isused as an amino modified cross-linking agent, so that the amino grafting amount is increased, the active center is increased, rapid diffusion and ion exchange of rhenium are facilitated, and the exchange capacity is further improved. Fe and Ce are adopted to carry out inorganic modification on the ion exchange resin together, so that the rhenium adsorption capacity is enhanced, and the selectivity is improved. When other ions are contained, the macroporous ion exchange resin prepared by the method has high rhenium selectivity, and the result shows that the macroporous ion exchange resin hashigh rhenium selectivity.

Description

technical field [0001] The invention belongs to the field of ion exchange resins, in particular to a macroporous ion exchange resin with highly selective adsorption of rhenium metal ions. Background technique [0002] Rhenium is a rare refractory metal, which not only has good plasticity, mechanical properties and creep resistance, but also has good wear resistance and corrosion resistance. Rhenium and its alloys are widely used in aerospace, electronics, petrochemical and other fields. The global reserves of rhenium are very small, and the price is relatively expensive. Therefore, the separation and collection of rhenium is very critical. [0003] Common methods for rhenium separation and enrichment are extraction separation, ion exchange, redox, precipitation separation, activated carbon adsorption and so on. There are certain problems in the enrichment and recovery of rhenium by the extraction method. For example, rhenium and molybdenum have co-extraction properties, a...

AI Technical Summary

Problems solved by technology

There are certain problems in the enrichment and recovery of rhenium by the extraction method. For example, rhenium and molybdenum have co-extraction properties, and the extraction and separation effect is not ideal. The emulsification phenomenon is also prone to occur during the extraction process, resulting in the loss of the extraction agent and the decrease in the yield. In addition, common organic extraction agents have Certain toxicity brings difficulties to wastewater treatment

The chemical method requires many reagents, complicated process, and the yield of rhenium is relatively low. There is also the problem of a large amount of waste water and waste residue in the production process.

[0004] Compared with the extraction separation method and chemical method, the ion exchange method has low toxicity, simple operation and good selectivity, but the current rhenium ion exchange resin has the disadvantages of low ion exchange capacity and poor adsorption selectivity.

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