Montmorillonite-based composite lithium ion adsorbent and preparation method thereof

The invention relates to the field of lithium ion enrichment and extraction, in particular to a montmorillonite-based composite lithium ion adsorbent and a preparation method thereof. The organic-inorganic composite lithium ion adsorption material is prepared by taking natural montmorillonite as a raw material and adopting a SiO2 functionalization-chemical grafting-coprecipitation combined mode, a new method is provided for the development of a montmorillonite-based lithium ion adsorption material, extraction of a lithium resource in brine is facilitated, and effective utilization of the montmorillonite resource is also facilitated. 本发明涉及锂离子富集和提取领域，具体为一种基于蒙脱石的复合锂离子吸附剂及其制备方法。本发明以天然蒙脱石为原料，采用SiO2功能化-化学接枝-共沉淀相结合的方式制备有机-无机复合锂离子吸附材料，为蒙脱石基锂离子吸附材料开发提供了新方法，不仅有利于卤水中锂资源的提取，也有利于蒙脱石资源的有效利用。