Process for producing fluohydric acid
A technology of hydrofluoric acid and sulfuric acid, applied in the direction of fluorine/hydrogen fluoride, etc., can solve the problems of lack of fluorite and high price of hydrofluoric acid, and achieve the effects of low production cost, abundant resources, good social value and economic value
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Embodiment 1
[0016] The method for producing hydrofluoric acid in this embodiment is: mix ammonium fluoride and sulfuric acid in a reaction furnace at a molar ratio of 2:1, ammonium fluoride is a solid with very little water, and the concentration of sulfuric acid is 98%. Above, the reaction temperature is controlled at 180°C, the reaction time is 4 hours, the gas produced by the reaction is condensed and purified or absorbed to obtain anhydrous hydrofluoric acid or hydrofluoric acid with water, and the solid produced by the reaction is ammonium sulfate product.
Embodiment 2
[0018] The method for producing hydrofluoric acid in this embodiment is as follows: ammonium bifluoride and sulfuric acid are mixed and reacted in a reaction furnace at a molar ratio of 2:1, ammonium bifluoride is a solid with very little water, and the concentration of sulfuric acid is more than 98%. The temperature is controlled at 200°C, and the reaction time is 3 hours. The gas produced by the reaction is condensed and purified or absorbed to obtain anhydrous hydrofluoric acid or hydrofluoric acid with water, and the solid produced by the reaction is ammonium sulfate product.
Embodiment 3
[0020] The method for producing hydrofluoric acid in this embodiment is: mix and react ammonium fluoride and sulfuric acid in a reaction furnace at a molar ratio of 2:1, ammonium fluoride is a solid with very little water, and the concentration of sulfuric acid is more than 98%. , the reaction temperature is controlled at 220°C, the reaction time is 2 hours, the gas produced by the reaction is condensed and purified or absorbed to obtain anhydrous hydrofluoric acid or hydrofluoric acid with water, and the solid produced by the reaction is ammonium sulfate product.
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