Preparation method of vanadium pentoxide adsorbent

Abstract

The invention provides a preparation method of a vanadium pentoxide adsorbent. A comonomer N-(4-bromophemyl) maleimide, 1,1-difuoro-2,2-dichloroethylene and 1,1,3,3,3-pentafluoride-1-propylene are added to styrene in cross-linked polymerization, a polymer with an imide group and a fluorine element on a framework is generated, and anion exchange resin containing amido and an imide group is prepared after chloromethylation and amination reactions and the like. The imide group is introduced on the framework of the polymer, the amination reaction efficiency is improved, the binding force of the resin and anions containing vanadium is increased, and the adsorption capacity is improved. The fluorine element increases the corrosion resistance of the framework of the resin, the surface of a sphere is protected, accordingly, the service life is prolonged, and the application range of the adsorption material is widened. The preparation method is used for extracting vanadium pentoxide, and the prepared vanadium pentoxide adsorbent has the advantages of high content of functional groups, high adsorption capacity, long service life and the like.

Description

Technical field [0001] The invention relates to a preparation method of anion exchange resin, in particular to a preparation method of vanadium pentoxide adsorbent. Background technique [0002] my country began to extract vanadium from stone coal in the 1970s. The southern provinces directly extract high-grade vanadium pentoxide (w(V2O5)>98%) products from stone coal, which are exported to the United States, Japan, West Germany, Belgium and other countries, and have achieved great results. In the early 1970s, my country conducted a series of experiments on extracting vanadium by ion exchange. By the early 1990s, the process of extracting vanadium from stone coal by 717 ion exchange resin method had been applied in production in Tongcheng, Danjiangkou, Hubei and other places. At present, the ion exchange method has also been successfully used to extract vanadium from waste vanadium catalysts. The advantages of this method are short process, low consumption of raw materials, ...

AI Technical Summary

Problems solved by technology

[0004] At present, the commonly used ion exchange resins in the vanadium extraction industry are traditional polystyrene-based anion exchange resins such as D201, D301, and D290. However, the actual adsorption capacity of ion exchange resins for vanadium extraction is still low, and is generally low in practical applications. less than 90mg / g; the resin can easily reach the saturated adsorption capacity during use, and needs to be regenerated and updated frequently, resulting in a higher total cost of vanadium extraction

The method of using organic amine and vanadium compound to participate in the polymerization reaction will affect the uniformity of polymerization, resulting in the reduction of resin strength after long-term use, which affects the use effect in industrial devices

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