Method for concentrating lithium-containing solution by reverse osmosis

Abstract

The invention relates to a method for concentrating a lithium-containing solution by reverse osmosis, which is carried out sequentially according to the following steps: (1) adding a bactericide to the lithium-containing solution; (2) adding a reducing agent; (3) adding an acid to adjust the pH value; ( 4) pressurize to pass through the primary reverse osmosis membrane; (5) pressurize and pass through the secondary reverse osmosis membrane. The method for concentrating the lithium-containing solution by reverse osmosis of the present invention adopts two-stage reverse osmosis concentration, so that the lithium concentration in the lithium-containing solution is rapidly increased by 5 to 6 times, which saves time compared with the traditional concentration method. The invention solves the problems of long solar evaporation concentration time and large evaporation area. On the other hand, the fresh water produced can be recycled, which greatly reduces the water consumption in the process and solves the high energy consumption caused by other forced concentration methods. , There is a problem of pollution, and the economic benefit is improved.

Description

Method for concentrating lithium-containing solution by reverse osmosis Technical field The present invention relates to a kind of method utilizing reverse osmosis technology to carry out solution concentration, be specifically related to a kind of reverse osmosis concentration Lithium-containing solution method. Background technique my country is a large country of lithium resource reserves, and the proven industrial reserves of lithium resources rank second in the world, wherein Lithium brine accounts for 79%, and the prospective reserves are even more impressive. Although my country's salt lake lithium resources are huge, most of the salt lake lithium resources Mg / The lithium ratio is as high as 1000-1500, and the magnesium / lithium ratio is dozens or even hundreds of times higher than that of foreign countries. The lithium extraction process is relatively complicated. because The brine in Chaerhan Salt Lake in my country is high in magnesium and low in lithium, a...

AI Technical Summary

Problems solved by technology

Summary of the invention The object of the present invention is to provide a kind of problem that can solve solar energy evaporation concentration time long, evaporation area is big