A kind of preparation method of lithium adsorbent and lithium adsorbent

Abstract

The invention discloses a lithium adsorbent and a preparation method of the lithium adsorbent. The preparation method comprises the following steps: step S1: sufficiently mixing an aluminum chloride solution with the lithium compound to form a reaction preliminary body, wherein the amount of substance of the aluminum chloride to the lithium compound is (1.8 to 2.2) to 1, and the lithium compound is one of the lithium hydroxide, lithium carbonate and lithium chloride; step S2: adding a sodium hydroxide solution in the reaction preliminary body, wherein the amount of the substance of the sodium hydroxide to the aluminum chloride is (2.5 to 3.5) to 1; reacting to generate LiCl.2.2-2.8Al(OH)3.2.7-3.9H2O so as to form a first product; step S3, performing solid-liquid separation, drying, grinding and smashing on the first product to form a second product; step S4, adding adhesive and the liquid chlorine in the second product to realize mixing granulation, thereby forming a third product; and step S5, crushing and sieving the third product to obtain the lithium adsorbent. The preparation process of the lithium adsorbent is simple and efficient, the prepared lithium adsorbent is excellent in property, and the raw material has great selectivity, so that the preparation cost of the lithium adsorbent is effectively saved.

Description

technical field

[0001] The invention relates to the technical field of lithium technology, in particular to a preparation method of a lithium adsorbent and the lithium adsorbent. Background technique

[0002] Lithium metal is widely used in rechargeable batteries, glass, ceramics, alloys, lubricants, medicine and other fields, especially rechargeable lithium batteries have received extensive attention as the main power source of hybrid and electric vehicles in recent years. In addition, there is a huge market for using lithium in existing small batteries such as mobile phones and notebook computers. As a result, lithium metal is in high demand both domestically and abroad across the industrial spectrum. The only current industrial method for producing lithium metal is lithium chloride molten salt electrolysis. Therefore, in order to meet the market demand for metallic lithium, it is necessary to greatly increase the production of lithium chloride. Lithium chloride is a ki...