A kind of separation device of magnesium lithium ion and separation method thereof

Abstract

The invention discloses a magnesium lithium ion separating device and a separating method thereof. The device comprises a separating film, wherein a plurality of micrometer passages with consistent orientations are formed in the separation film; the diameter of each micrometer passage is 10 to 100 mum; a raw liquid region communicated with the inlet end of the micrometer passage is arranged at one side of the separating film; a separating region connected with an outlet end of the micrometer passages is arranged at the other side of the separating film; a section of negative ion exchange film is arranged on the inner wall of the micrometer passages; the outer surface of the negative ion exchange film is communicated with the inner cavity of the micrometer passages; a first electrode is arranged at one side, relative to the raw liquid region, of the separating film; a second electrode is arranged at one side, relative to the separation region, of the separating film. The device and the method have the advantages that only the hundred micrometer level hole diameter requirements need to be met; the operation pressure and the manufacturing difficulty are reduced, so that the separation cost is reduced; the industrial popularization is facilitated.

Description

technical field [0001] The invention relates to a separation device for magnesium and lithium ions and a separation method thereof. Background technique [0002] The application of lithium and its compounds has developed from traditional industries such as glass, ceramics, nonferrous metallurgy, air conditioning, medicine, lubricants, welding materials, etc. to high-tech fields such as lithium-ion batteries, national defense, etc. In recent years, with the rapid development of information technology, lithium-ion batteries have become the fastest-growing emerging industry, energy materials in the 21st century, and are known as important elements that drive the world forward. The lithium reserves contained in the ocean are about 2×10 6 Mt, but lithium concentrations in seawater are very low (0.17mgdm -3 ), the cost of extracting lithium from seawater is 10-30 times that of extracting lithium-containing ores and salt lakes. At present, lithium extraction from salt lake brin...

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to propose a method capable of efficiently separating magnesium ions (Mg 2+ ) and lithium ions (Li + ) membrane device, which only requires a pore size of 100 microns, reduces operating pressure and manufacturing difficulty, thereby reducing separation costs and contributing to industrial promotion

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