Preparation method of silica gel loaded polyhydroxyl chelating resin for highly effective boron removal

Abstract

The invention relates to a preparation method of chelating resin for highly effective boron absorption, especially a preparation method of silica gel loaded polyhydroxyl chelating resin for highly effective boron removal. The method comprises reacting meglumine and silane coupling agent in inert organic solvent, generating meglumine modified silane coupling agent, making the meglumine modified silane coupling agent react with activated silica gel, and finally generating a silica gel loaded polyhydroxyl chelating resin for highly effective boron removal. Compared with the conventional macromolecule-based boron-removing chelating resin, the invention has simple and economical method, overcomes the detects in the present synthesis flow that the silica gel is dissolved for alkalinity of the reaction system is too high (pH more than 11) when surface modified halogen or silica gel of epoxide group reacts with meglumine to synthesize the silica gel loaded polyhydroxyl boron-removing chelating resin, or that the silica gel loaded polyhydroxyl boron-removing chelating resin cannot be synthesized for the nucleophilic substitution of halogen or epoxide group with meglumine cannot be carried out effectively when alkalinity of the reaction system is too low (pH less than 10).

Description

Technical field: [0001] The invention relates to a preparation method of a chelating resin with high-efficiency adsorption performance on boron, in particular to a preparation method of a silica gel-loaded polyhydroxy efficient boron-removing chelating resin. Background technique: [0002] my country is rich in boron resources, and boron reserves rank fifth in the world, but there are many lean ores and few rich ores. With decades of mining, high-grade solid boron ore resources are close to exhaustion. Therefore, from the salt lake brine rich in boron resources Boron extraction has become the main way to obtain boron resources in recent years. The methods for extracting boron from salt lake brine mainly include: acidification precipitation method, flotation method, chelation adsorption method, solvent extraction method, etc. Among them, chelation adsorption method is suitable for treating brine with low boron concentration, and it has strong selectivity, It has broad applica...

AI Technical Summary

Problems solved by technology

In this synthesis method, the generation of modified silane coupling agent can effectively reduce the alkalinity of meglumine in the reaction system, avoid the dissolution of silica gel in the modification process, and effectively improve the synthesis efficiency of the resin, but this method synthesizes The particle size distribution of the resin is too wide, the adsorption capacity is low, the cost is expensive and the synthesis process is complicated, it is difficult to effectively promote in practical applications (O.Kaftan, M.Acikel, A.E.Eroglu, T.Shahwan, L.Artok, C.Ni , Synthesis, characterization and application of a novel sorbent, glucamine-modified MCM-41, for the removal / preconcentration of boron from waters, Anal.Chim.Acta 2005, 547:31~41; B.Tural, Separation and preconcentration of boron with a glucamine modified novel magnetic sorbent. Clean-Soil, Air, Water 2010, 38: 321~327; H.N.Liu, X.S.Ye, Q.Li, T.Kim, B.J.Qing, M.Guo, F Ge, Z.J.Wu, K. Lee, Boron absorption using a new boron-selective hybrid gel and the commercial resin D564. Colloids and Surfaces A: Physicochemical and Engineering Aspects 2009, 341: 118~126.)

Images