Preparation method of lithium phosphate
A technology of lithium phosphate and lithium carbonate, applied in chemical instruments and methods, phosphorus compounds, inorganic chemistry, etc., can solve the problems of cumbersome process and low recovery rate, and achieve the effect of simple process, high recovery rate and single phase
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[0023] Example 1
[0024] (1)1.8M 3 Add 1400L of pure water to the stainless steel reaction tower, turn on carbon dioxide, control the pressure at 0.2Mpa, add 60Kg of industrial grade lithium carbonate, then add 0.12Kg of oxalic acid and 0.29Kg of barium hydroxide, continue to introduce carbon dioxide until the pH of the solution is 9, and then add The obtained solution was filtered with a polypropylene plate and frame filter press to collect the lithium bicarbonate solution;
[0025] (2) At 5M 3 In the stainless steel reaction kettle, add 4000L of the lithium bicarbonate solution of step (1), add 186Kg of food-grade phosphoric acid under stirring, to about pH=6 of the solution, heat to 70°C and stir for 30 minutes, and adjust the solution with ammonia water with a weight concentration of 25% pH=8, then carry out solid-liquid separation at 95°C, and the separation time is not less than 30 minutes to obtain 182.66Kg of lithium phosphate wet material, and the weight content of...
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[0028] Example 2
[0029] (1)1.8M 3 Add 1400L of pure water to the stainless steel reaction tower, turn on carbon dioxide, control the pressure at 0.15Mpa, add 60Kg of industrial grade lithium carbonate, then add 0.16Kg of oxalic acid and 0.32Kg of barium hydroxide, continue to introduce carbon dioxide to the pH of the solution = 8, and then add The obtained solution was filtered with a polypropylene plate and frame filter press to collect the lithium bicarbonate solution;
[0030] (2) At 5M 3 In the stainless steel reaction kettle, add 4000L of the lithium bicarbonate solution of step (1), add 188Kg of food-grade phosphoric acid under stirring, to about pH=6.0 of the solution, heat to 70 ° C and stir for 30 minutes, adjust the solution with ammonia water with a weight concentration of 25% pH=8.2, then carry out solid-liquid separation at 95°C, and the separation time is not less than 30 minutes to obtain 183.95Kg of lithium phosphate wet material, and the weight content of ...
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