A high-Mg-Li than the Lithium novel co-extracted and co-extraction method System

A high-Mg-Li than the Lithium novel co-extraction system, the extraction agent is constituted by co-extraction agent, the extraction agent is co potassium hexafluorophosphate, sodium hexafluorophosphate, magnesium hexafluorophosphate, calcium hexafluorophosphate , potassium fluoroborate, sodium fluoroborate, fluoro magnesium borate, calcium borate in a fluoropolymer, or a mixture of two or more. A high-Mg-Li than the Lithium novel co-extraction method, comprising the step of extraction, back extraction, precipitation to precipitate magnesium and a lithium, lithium magnesium brine is greater than 100, increasing eluted between extraction and back extraction step step. The present invention is a simple process, high lithium extraction rate, effectively reducing the brine than lithium, magnesium, ferric more traditional extraction system has obvious advantages, it can be applied to the Lithium Salt Lake, particularly suitable to solve higher than Mg-Li the lithium Salt Lake difficult.