Preparation method and application of iron phosphate
A technology of iron phosphate and iron phosphorus, which is applied in chemical instruments and methods, phosphorus compounds, inorganic chemistry, etc., can solve the problems of large acid-base consumption, high energy consumption, and high requirements for raw material purity, and achieves low cost and low energy consumption. , the effect of simple operation
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0045] A preparation method for iron phosphate, comprising the following steps:
[0046] (1) Weigh 80g of ferrophosphorus, calcinate it in an oxygen atmosphere at 350°C for 3 hours, and configure H + For a hydrochloric acid solution with a concentration of 10mol / L, measure 120mL of the prepared hydrochloric acid solution, dissolve the weighed ferrophosphorus into the hydrochloric acid solution at 20°C, and filter to obtain an acidic iron-phosphorus solution;
[0047] (2) Add an appropriate amount of deionized water to the obtained acidic iron-phosphorus solution, control the concentration of iron and phosphorus at 1.0mol / L, and pour the diluted acidic iron-phosphorus solution into the precipitate equipped with a self-priming stirring paddle In the reactor, add anhydrous iron phosphate according to the amount of 100g / L, the precipitation reactor is equipped with a condensation reflux device, according to the temperature rise curve of T(°C)=25+120t(h), the temperature of the sol...
Embodiment 2
[0053] A preparation method for iron phosphate, comprising the following steps:
[0054] (1) Weigh 30g iron powder and 80g diammonium hydrogen phosphate; configure H + Sulfuric acid solution with a concentration of 1mol / L, measure 1000mL of the prepared sulfuric acid solution, dissolve iron powder and diammonium hydrogen phosphate into the sulfuric acid solution at 60°C, filter to obtain an acidic iron-phosphorus solution, in which the concentration of iron and phosphorus is about At 0.5mol / L;
[0055] (2) Pour the acidic iron-phosphorus solution into the precipitation reactor equipped with conventional stirring paddles, control the linear velocity of the stirring blade tip to be 3.5m / s, add metatitanic acid and ferric phosphate dihydrate according to the amount of 300g / L, press T(°C)=25+200t(h) heating curve, raise the temperature of the solution to 100°C and stir synchronously, start timing when the temperature reaches 100°C, and continue stirring for 4 hours to obtain a sl...
Embodiment 3
[0059] A preparation method for iron phosphate, comprising the following steps:
[0060] (1) Weigh 10g of spent lithium iron phosphate cathode powder, calcinate it in nitrogen at 200°C for 3 hours, and configure H + Sulfuric acid solution with a concentration of 2.5mol / L, measure 100mL of the prepared sulfuric acid solution, dissolve the calcined waste lithium iron phosphate positive electrode powder into the sulfuric acid solution at 40°C, and filter to obtain an acidic iron-phosphorus solution, in which iron and phosphorus The concentration is about 0.5mol / L;
[0061] (2) Pour the acidic iron-phosphorus solution into the homogeneous reactor, control the linear velocity of the tip of the blade to 8m / s, do not add precipitation aids, place the homogeneous reactor containing the solution in the homogeneous reactor, press the temperature rise Curve T(°C)=[①25+80t; ②105+200t(h)] (when t<1, T=①; when t≥1, T=②), raise the temperature of the reactor to 180°C, wait until the tempera...
PUM
| Property | Measurement | Unit |
|---|---|---|
| particle diameter | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More