A method for extracting lithium from salt lake brine and preparing lithium phosphate and use thereof
A technology of salt lake brine and lithium phosphate, applied in chemical instruments and methods, phosphorus compounds, structural parts, etc., can solve the problems of the comprehensive electrochemical performance to be improved, the regulation of the particle size of lithium iron phosphate, the complex preparation process, etc., to achieve easy industrialization Application, excellent electrochemical performance, simple operation effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0090] Method for preparing nano-scale porous lithium phosphate using salt lake brine:
[0091] The content of lithium in the salt lake brine solution described in this example is 2g / L, and the concentration of ammonium ions is 3g / L.
[0092] (1) Add the oxalic acid solution with a concentration of 1 mol / L to the salt lake brine solution until the precipitation no longer occurs, separate the solid from the liquid, take the filtrate, and in the obtained filtrate, oxalate ions and Li + The molar ratio is 1:0.5;
[0093] (2) phosphoric acid whose concentration of phosphorus element is 0.5mol / L is added dropwise to the filtrate obtained in step (1) at a rate of 60 drops / min, and the addition of the phosphoric acid makes the mol ratio of phosphorus element and Li ion in the filtrate 1:0.5; microwave heating at 160° C. for 30 min, and the microwave heating power is 500 W, filter, and wash with deionized water to obtain nano-scale porous lithium phosphate.
[0094] Wherein, the lit...
Embodiment 2
[0096] Method for preparing nano-scale porous lithium phosphate using salt lake brine:
[0097] The salt lake brine solution in this embodiment is obtained by evaporating the solvent in the salt lake brine solution, the Li content in the salt lake brine solution is 5g / L, and the concentration of ammonium ions is 7g / L.
[0098] (1) add the oxalic acid solution that concentration is 0.5mol / L in salt lake brine solution until precipitation no longer occurs, solid-liquid separation, take filtrate, oxalate ion and Li in described filtrate + The molar ratio is 1:5;
[0099] (2) the concentration of phosphorus element is that the sodium hydrogen phosphate solution of 0.25mol / L is added dropwise to the filtrate obtained in step (1) at a rate of 30 drops / min, and the addition of the sodium hydrogen phosphate makes the phosphorus element in the filtrate and the The molar ratio of Li ions is 1:0.3; microwave heating at 140° C. for 60 min with a power of 300 W, filtering, and washing wit...
Embodiment 3
[0102] The difference between this example and Example 1 is that in the obtained filtrate, oxalate ions and Li + The molar ratio is 1:5, and other conditions are exactly the same as those in Example 1.
[0103] Wherein, the lithium extraction rate is 97%, and the average size of primary particle size of lithium phosphate is 67 nm.
PUM
| Property | Measurement | Unit |
|---|---|---|
| particle size | aaaaa | aaaaa |
| particle size | aaaaa | aaaaa |
| particle diameter | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More