Method for deeply removing fluorine from LiCl solution recovered from waste batteries

A technology for used batteries and solutions, applied in battery recycling, waste collector recycling, recycling technology, etc., can solve the problems of unfavorable production, large investment, and high cost of defluorination, and achieves simple process, low production cost, and the solution to the problem. The effect of corrosion on equipment
CN111139367AInactive Publication Date: 2020-05-12江西赣锋循环科技有限公司
8 Cites 12 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
江西赣锋循环科技有限公司
Publication Date
2020-05-12
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
Patent Text Reader

Abstract

The invention discloses a method for deeply removing fluorine from an LiCl solution recovered from waste batteries. According to the method, the LiCl solution is used as a raw material for preparing battery-grade lithium carbonate. The method comprises the following steps of A, preparing the raw material; B, activating a fluorine removal agent; C, adjusting a pH of the system; D, removing the fluorine from the LiCl solution; and E, regenerating the fluorine removal agent. According to the method, deep fluorine removal can be achieved through adding a small amount of the fluorine removal agentinto the LiCl solution, and then the LiCl solution is regenerated and reused through a sodium hydroxide solution. The method is good in fluorine removal effect, simple and rapid, and the fluorine removal agent can be regenerated and reused for multiple times, so that the production cost is greatly reduced; and meanwhile, the method has the advantages of short process flow, high fluorine removal efficiency, simplicity in operation, greenness, environmental friendliness and the like, and large-scale industrial production can be realized.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the technical field of battery recovery, in particular to a method for deep defluorination of LiCl solution recovered from waste batteries. Background technique

[0002] Lithium is the lightest and most active metal element in nature. Lithium and its compounds are widely used in pottery, glass, pharmaceuticals, aluminum products, synthetic rubber, plastics, lithium batteries, refrigerants, military industry, high-tech, etc. Lithium has the reputation of "the energy metal that promotes human progress".

[0003] Therefore, the recovery and reuse of lithium resources is also an important issue. The recovery of various waste batteries in the recovery of lithium resources is the top priority. At present, domestic waste batteries mainly rely on wet extraction. In this process, due to the existence of electrolyte in waste batteries and the limitation of the process flow, it will inevitably lead to the enrichment of fluoride ions in ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More