Method for preparing potassium cryolite by using aluminum fluoride production wastewater
A technology for producing waste water and potassium cryolite, which is applied in chemical instruments and methods, aluminum sulfate, inorganic chemistry, etc., can solve the problems of high reaction temperature and high production cost of potassium cryolite, and achieve the effect of reducing production cost and reaction temperature
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Embodiment 1
[0027] Measure 500ml of aluminum fluoride production wastewater, after testing Al 3+ Content 10.08mg / ml, converted to AlF 3 The actual content is 15.68 g, and the content of fluosilicic acid is 0.5 wt %; 16.7 g of KCl is weighed; and 10 g of hydrofluoric acid with a content of 40 wt % is weighed.
[0028] Put the mother liquor washing water mixture into a plastic beaker, add hydrofluoric acid, stir slightly with a plastic medicine spoon, put the beaker into a constant temperature water bath at 90°C and start to heat up; when the temperature rises to 80°C, carefully put KCl into the beaker, Start the timing, and after timing the reaction for 2 hours, remove the plastic beaker from the water bath, let it cool down to 75°C and start filtering, and dry the obtained solid at 500-550°C for 30-35 minutes to obtain 14.75g of potassium cryolite finished product.
[0029] Adopt infrared spectrometer to analyze described finished product, and compare the infrared spectrogram obtained wi...
Embodiment 2
[0033] 1000ml of aluminum fluoride production wastewater was tested for Al 3+ Content 10.08mg / ml, converted to AlF 3 The actual content is 31.16g, and the content of fluosilicic acid is 0.5wt%; 16.7g of KCl is weighed; 10g of hydrofluoric acid with a content of 40wt% is weighed.
[0034] Put the mother liquor washing water mixture into a plastic beaker, add hydrofluoric acid, stir slightly with a plastic medicine spoon, put the beaker into a constant temperature water bath at 90°C and start to heat up; when the temperature rises to 80°C, carefully put KCl into the beaker, Start the timing, and after timing the reaction for 2 hours, remove the plastic beaker from the water bath, let it cool down to 75°C and start filtering, and dry the obtained solid at 500-550°C for 30-35 minutes to obtain 14.75g of potassium cryolite finished product.
[0035] Adopt infrared spectrometer to analyze described finished product, and compare the infrared spectrogram obtained with the infrared sp...
Embodiment 3
[0039] 500ml of aluminum fluoride production wastewater was tested for Al 3+ Content 10.08mg / ml, converted to AlF 3 The actual content is 15.68 g, and the content of fluosilicic acid is 0.5 wt %; 33.4 g of KCl is weighed; 20 g of hydrofluoric acid with a content of 40 wt % is weighed.
[0040]Put the mother liquor washing water mixture into a plastic beaker, add hydrofluoric acid, stir slightly with a plastic medicine spoon, put the beaker in a constant temperature water bath at 80°C and start to heat up; when the temperature rises to 75°C, carefully put KCl into the beaker, Start the timing, and after timing the reaction for 2 hours, remove the plastic beaker from the water bath, let it cool down to 75°C and start filtering, and dry the obtained solid at 500-550°C for 30-35 minutes to obtain 11.03g of potassium cryolite finished product.
[0041] Adopt infrared spectrometer to analyze described finished product, and compare the infrared spectrogram obtained with the infrared...
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