A kind of production method of acid potassium thiophosphate
A kind of technology of acid potassium thiophosphate and its production method, which is applied in the field of phosphate production, can solve the problems that there is no good industrial production method for acid potassium thiophosphate, and achieve good market prospects, simple method and high acidity
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Embodiment 1
[0036] Weigh 100kg of potassium sulfate, add it to 60kg of water, start stirring, disperse evenly, heat to 70°C, and make potassium sulfate slurry;
[0037] According to P 2 o 5 / K 2 O mass ratio is 1.0 ratio calculation Weigh 126kg of wet-process phosphoric acid, add it to the evenly stirred potassium sulfate slurry, and react for 3 hours; put the slurry into the drier to atomize and dry, and control the inlet temperature of the drier to 230-270°C. The outlet temperature is 110-130°C to obtain a powdery final product. Product indicators are shown in Table 2.
Embodiment 2
[0039] Weigh 100kg of potassium sulfate, add it to 80kg of water, start stirring, disperse evenly, heat to 90°C, and make potassium sulfate slurry;
[0040] According to P 2 o 5 / K 2 O mass ratio is 0.7 ratio calculation Weigh 88kg of wet-process phosphoric acid, join in the evenly stirred potassium sulfate slurry, react for 2 hours; add the slurry into the drier to atomize and dry, control the inlet temperature of the drier to 300-320°C, The outlet temperature is 90-100°C to obtain a powdery final product. Product indicators are shown in Table 2.
Embodiment 3
[0042] Method is the same as embodiment 1, P 2 o 5 / K 2 O mass ratio control is 1.20, obtains product index and is shown in Table 2.
[0043] Weigh 100kg of potassium sulfate, add it to 90kg of water, start stirring, disperse evenly, heat to 80°C, and make potassium sulfate slurry;
[0044] According to P 2 o 5 / K 2 O mass ratio is the ratio calculation of 1.2 Weigh 151kg of wet-process phosphoric acid, join in the evenly stirred potassium sulfate slurry, react for 4 hours; Add the slurry into the drier to atomize and dry, control the inlet temperature of the drier to 280-300°C, The outlet temperature is 100-105° C. to obtain a powdery final product. Product indicators are shown in Table 2.
[0045] Table 2 Product Index
[0046]
[0047]The method for measuring the acidity is: take 1 g of the sample, dissolve it in 100 ml of water, titrate it with 0.5 mol / L NaOH solution to a pH value of 6.5, and the volume of lye consumed is the acidity of the product. This can m...
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