HYDROGEN FLUORIDE ADSORBENT AND SELECTIVE REMOVAL OF HYDROGEN FLUORIDE USING THE SAME

摘要

The present invention relates to a hydrogen fluoride adsorbent including a porous polymer functionalized with an amine group and adsorbing hydrogen fluoride in an aqueous solution including fluoride salt and the hydrogen fluoride. The hydrogen fluoride adsorbent according to the present invention includes the porous polymer which has a surface functionalized with the amine group and is capable of selectively removing only the hydrogen fluoride in the aqueous solution including the fluoride salt and the hydrogen fluoride. By a hydrogen fluoride removal method using the same, the hydrogen fluoride included in the aqueous solution including the fluoride salt can be selectively removed, and thus alkali metal fluoride obtained in a final stage of an alkali metal fluoride production process can have a high level of purity. In addition, the hydrogen fluoride which is highly corrosive and highly harmful is selectively removed in advance from the aqueous solution, and thus device protection can be ensured during recrystallization and drying processes.