Technique for producing potassium fluoride from potassium fluosilicate
A technology using potassium fluorosilicate and potassium fluoride, applied in the direction of alkali metal fluoride, etc., can solve the problems of high cost of hydrofluoric acid and resource consumption of fluorite, etc., to reduce raw material costs, reduce raw material costs, and improve separation Effect
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Embodiment 1
[0024] 1. Add liquid potassium hydroxide with a mass percentage concentration of 48% into the reaction kettle, start stirring, add sodium nitrilotriacetate in an amount of 0.2% of the weight of liquid potassium hydroxide, and uniformly follow 0.9 times the number of moles required by the reaction formula Add solid potassium fluorosilicate, fully react, and the pH value at the end of the reaction is 8.5-9.
[0025] 2. After the reaction in the reactor is complete, the reaction liquid is separated from the solid and liquid, and the solid is beaten and cleaned to become high-purity silica, which can be sold as white carbon black after drying.
[0026] 3. Add 2 / 3 of the reaction liquid in the second step into the sodium fluoride synthesis kettle, start stirring, and add sodium hydroxide at a uniform speed according to 1 times the molar number required by the reaction formula. After the reaction is completed, separate the solid from the liquid, and dry the solid Drying is the finis...
Embodiment 2
[0030] 1. Add liquid potassium hydroxide with a mass percentage concentration of 48% into the reaction kettle, start stirring, add sodium nitrilotriacetate in an amount of 0.2% of the weight of liquid potassium hydroxide, and uniformly follow 0.9 times the number of moles required by the reaction formula Add solid potassium fluorosilicate, fully react, and the pH value at the end of the reaction is 8.5-9.
[0031] 2. After the reaction in the reactor is complete, the reaction liquid is separated from the solid and liquid, and the solid is beaten and cleaned to become high-purity silica, which can be sold as white carbon black after drying.
[0032] 3. Add 2 / 3 of the reaction liquid in the second step into the sodium fluoride synthesis kettle, start stirring, and add sodium hydroxide at a uniform speed according to 1 times the molar number required by the reaction formula. After the reaction is completed, separate the solid from the liquid, and dry the solid Drying is the finis...
Embodiment 3
[0036] 1. Add liquid potassium hydroxide with a mass percentage concentration of 48% into the reaction kettle, start stirring, add sodium nitrilotriacetate in an amount of 0.2% of the weight of liquid potassium hydroxide, and uniformly follow 0.9 times the number of moles required by the reaction formula Add solid potassium fluorosilicate, fully react, and the pH value at the end of the reaction is 8.5-9.
[0037] 2. After the reaction in the reactor is complete, the reaction liquid is separated from the solid and liquid, and the solid is beaten and cleaned to become high-purity silica, which can be sold as white carbon black after drying.
[0038] 3. Add 2 / 3 of the reaction liquid in the second step into the sodium fluoride synthesis kettle, start stirring, and add sodium hydroxide at a uniform speed according to 0.9 times the molar number required by the reaction formula. After the reaction is completed, separate the solid from the liquid, and dry the solid Drying is the fin...
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