Method of preparing aluminum citrate by clay mine
A technology of aluminum citrate and clay ore, applied in carboxylate preparation, organic chemistry, etc., can solve the problems of low income, large environmental pollution, high cost of alumina, etc., and achieve the effect of promoting dissolution and increasing hydrolysis rate
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Embodiment 1
[0025] After crushing and ball milling, the 1# ore sample has a particle size of less than 74 μm. It is placed in a muffle furnace and roasted at 625°C for 3 hours. It is leached with a citric acid solution with a mass concentration of 6%. 10%, the treatment time is 6 hours, four stages of continuous leaching, and the leaching slag of the previous stage is used as the leaching ore sample of the latter stage. After each stage of leaching is completed, filter while hot. The slag after four stages of leaching was taken to analyze the content of Al2O3, SiO2 and Fe2O3. The crude filtrate was placed at room temperature for 12 hours, a large amount of white precipitate was formed, and microfiltration was performed to purify the precipitate. The microfiltrate is returned to the leaching section for recycling.
[0026] chemical composition
Embodiment 2
[0028]Will 2 # After crushing and ball milling, the ore sample has a particle size of less than 165 μm. It is placed in a muffle furnace and roasted at 575°C for 2.5 hours. The time is 4 hours, and three stages are continuously leached, and the leached slag of the former stage is used as the leached ore sample of the latter stage. After each stage of leaching is completed, filter while hot. The slag after two stages of leaching was taken to analyze the content of Al2O3, SiO2 and Fe2O3. The crude filtrate was placed at room temperature for 12 hours, a large amount of white precipitate was formed, and microfiltration was performed to purify the precipitate. The microfiltrate is returned to the leaching section for recycling.
[0029] chemical composition
Embodiment 3
[0031] Will 3 # After crushing and ball milling, the ore sample has a particle size of less than 110 μm. It is placed in a muffle furnace and roasted at 675°C for 3.5 hours. It is leached with a citric acid solution with a mass concentration of 4%. The stirring intensity is 300r / min, the pulp concentration is 10%, and the processing time is For 5 hours, three sections were continuously leached, and the leaching slag of the previous section was used as the leaching ore sample of the latter section. After each stage of leaching is completed, filter while hot. The slag after three stages of leaching was taken to analyze the content of Al2O3, SiO2 and Fe2O3. The crude filtrate was placed at room temperature for 12 hours, a large amount of white precipitate was formed, and microfiltration was performed to purify the precipitate. The microfiltrate is returned to the leaching section for recycling.
[0032] chemical composition
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