Concentration of Extractive Phosphoric Acid With Hot Air
Authors
Bahriddinov Nuriddin, Namazov Shafoat, Sherkuziev Doniyor
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This article substantiates methods for concentrating extraction phosphoric acid (EPA) with a concentration of 22÷28% P2O5, obtained on the basis of phosphorites of the Central Kyzylkum to 55% P2O5. As a result of evaporation using heated air under laboratory conditions, the amount of fluorine in it is much less than during evaporation under normal conditions. Initially, EPA was obtained from local Kyzylkum phosphorites under normal laboratory conditions by the dihydrate method. For this, a simple glass reactor was used, with a moving stirrer with an electric motor and vacuum filtering devices. The initial composition of the resulting EPA was analyzed by chemical and physicochemical methods and evaporated in three ways to a concentration of 55% P2O5. Laboratory work carried out by these methods was carried out under strict temperature control. The experiment was repeated several times and the results were compared. Experiments have shown that when EPA is evaporated to a concentration of 39÷46% P2O5, a precipitate is formed, which is convenient to separate. After separating the precipitates, it turned out that the resulting highly concentrated EPA does not lose its fluidity.
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Authors
Bahriddinov Nuriddin, Namazov Shafoat, Sherkuziev Doniyor
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References:
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