中文摘要：

金属锂与锂盐在新兴能源和化学工业中具有广阔的应用前景。中国盐湖锂资源极为丰富，且多为高镁锂比的盐湖卤水，但锂资源的开发利用尚存在技术障碍。开展锂镁分离及锂资源合理开发利用对国民经济的快速发展至关重要。归纳总结了沉淀法、吸附法、萃取法以及纳滤膜分离技术等方法在分离提取锂镁方面的进展，以及各方法的优缺点。为盐湖锂盐资源的有效开发提供了参考，并指出锂镁分离研究的重点和方向。

英文摘要：

Lithium metal and lithium salts have a wide application prospect in the new energy and chemical industries. Although there are large amount of lithium resources in China with a character of high ratio of magnesium to lithium ,the effective techniques for the separation and recovery of lithium and magnesium from brines are still scare. Presently, the most important for the rapid development of national economy is to carry out the separation of lithium and magnesium as well as rational development and utilization of lithium resources. Progress of extractive methods, such as precipitation method, absorption method, extraction method, and nano-fihration membrane separation technique etc. , in terms of magnesium and li- thium separation and recovery were summaried, advantages and disadvantages of each method were also compared. Reference for the exploiting of lithium resourse from salt lake was provided. At last, future research priority and direction of magnesiumlithium separation were pointed out.