A kind of method for preparing potassium dihydrogen phosphate co-production special fertilizer for Phyllostachys pubescens
A technology of potassium dihydrogen phosphate and special fertilizers, applied in chemical instruments and methods, applications, phosphorus compounds, etc., can solve the waste of potassium dihydrogen phosphate, low purity of potassium dihydrogen phosphate, and a large amount of impurities brought into potassium dihydrogen phosphate products and other issues, to achieve the effects of reduced production costs, significant economic benefits, significant environmental protection value and economic benefits
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Embodiment 1
[0041] A method for preparing potassium dihydrogen phosphate and co-producing special fertilizer for moso bamboo, using phosphoric acid and carbonamide in a molar ratio of 1.1:1 and mixing them in a reaction kettle, and then raising the temperature of the two mixtures at a heating rate of 5°C / min to 100°C, stirred and reacted for 120min, then cooled to 30°C at a speed of 3°C / min, and then centrifuged to obtain the intermediate of urea phosphate; the intermediate and basic potassium salt were added to the Mix the reaction in the reaction kettle, adjust the pH value of the reaction to 10, and stir the reaction at a stirring speed of 200r / min for 60min. After the reaction is completed, obtain a slurry containing nitrogen, phosphorus and potassium, and place the slurry in a cooling crystallizer for circulation crystallization treatment, while detecting and analyzing the filtrate, when the molar ratio of nitrogen, phosphorus and potassium in the filtrate is 9:1:5.5, stop crystalliza...
Embodiment 2
[0044] A method for preparing potassium dihydrogen phosphate and co-producing special fertilizer for moso bamboo, using phosphoric acid and carbonamide at a molar ratio of 1.3:1 and mixing them in a reactor, and then raising the temperature of the two mixtures at a heating rate of 5°C / min to 120°C, stirred and reacted for 100min, then cooled to 45°C at a speed of 3°C / min, and then centrifuged to obtain the intermediate of urea phosphate; the intermediate and basic potassium salt were added to the Mix the reaction in the reaction kettle, adjust the pH value of the reaction to 12, and stir the reaction for 40 minutes at a stirring speed of 250r / min. After the reaction is completed, obtain a slurry containing nitrogen, phosphorus and potassium, and place the slurry in a cooling crystallizer for circulation crystallization treatment , while detecting and analyzing the filtrate, when the molar ratio of nitrogen, phosphorus and potassium in the filtrate is 11:1:6.5, stop crystallizat...
Embodiment 3
[0047] A method for preparing potassium dihydrogen phosphate and co-producing special fertilizer for moso bamboo, using phosphoric acid and carbonamide in a molar ratio of 1.2:1 and mixing them in a reaction kettle, and then raising the temperature of the two mixtures at a heating rate of 5°C / min to 110°C, stirred and reacted for 110min, then cooled to 40°C at a speed of 3°C / min, and then centrifuged to obtain the intermediate of urea phosphate; the intermediate and basic potassium salt were added to the Mixed reaction in the reaction kettle, adjust the pH value of the reaction to be 10, and the stirring speed is 220r / min stirring reaction for 50min. After the reaction is completed, obtain a slurry containing nitrogen, phosphorus and potassium, and place the slurry in a cooling crystallizer for circulation crystallization treatment. Simultaneously detect and analyze the filtrate, when the molar ratio of nitrogen, phosphorus and potassium in the filtrate is 10:1:6, stop crystall...
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