A kind of preparation method of carrot special fertilizer
A preparation method and technology for special fertilizers, applied in chemical instruments and methods, applications, phosphate fertilizers, etc., can solve the problems of low purity of potassium dihydrogen phosphate products, waste of potassium dihydrogen phosphate, etc., and achieve significant environmental protection value and economic benefits, production. The effect of cost reduction and significant economic benefits
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Embodiment 1
[0041] A preparation method of special fertilizer for carrots, using phosphoric acid and carbonamide at a molar ratio of 1.1:1 to add into a reactor and mix them, then raise the temperature of the two mixtures to 100°C at a heating rate of 5°C / min, and stir for 120 minutes , then cool the temperature to 35°C at a speed of 3°C / min, and then centrifuge to obtain the urea phosphate intermediate; add the intermediate and basic potassium salt to the reaction kettle at a molar ratio of 1:1.2 to mix and react, adjust The pH value of reaction is 9, is 200r / min stirring reaction 60min with stirring speed, after reaction finishes, obtain the slurry containing nitrogen, phosphorus and potassium, place this slurry in cooling crystallizer and circulate crystallization treatment, detect and analyze filtrate simultaneously, When the nitrogen content in the filtrate is 10%, the phosphorus pentoxide content is 9%, and the potassium oxide content is 9, stop crystallization and filter, and the fi...
Embodiment 2
[0043] A preparation method of special fertilizer for carrots, using phosphoric acid and carbonamide in a molar ratio of 1.3:1 to add into a reactor and mix them, then raise the temperature of the two mixtures to 120°C at a heating rate of 5°C / min, and stir for 100 minutes , then cooled the temperature to 45°C at a speed of 3°C / min, and then centrifuged to obtain the urea phosphate intermediate; the intermediate and potassium hydroxide were added to the reactor at a molar ratio of 1:1.4 to mix and react to adjust the reaction The pH value is 10, and the stirring speed is 250r / min stirring reaction 40min, after the reaction finishes, obtain the slurry containing nitrogen, phosphorus and potassium, place the slurry in a cooling crystallizer for circulation crystallization treatment, and detect and analyze the filtrate simultaneously, when the filtrate When the nitrogen content is 13%, the phosphorus pentoxide content is 6%, and the potassium oxide content is 6, stop crystallizati...
Embodiment 3
[0045] A preparation method of special fertilizer for carrots, using phosphoric acid and carbonamide in a molar ratio of 1.2:1 to add into a reactor and mix them, then raise the temperature of the two mixtures to 110°C at a heating rate of 5°C / min, and stir for 110 minutes , and then cooled the temperature to 40°C at a speed of 3°C / min, and then centrifuged to obtain the urea phosphate intermediate; the intermediate and potassium hydroxide were added to the reactor at a molar ratio of 1:1.3 to mix and react to adjust the reaction The pH value of the solution is 9.5, and the stirring speed is 220r / min. After the 50min stirring reaction, the slurry containing nitrogen, phosphorus and potassium is obtained. When the nitrogen content is 12%, the phosphorus pentoxide content is 8%, and the potassium oxide content is 8%, stop crystallization and filter, and the filter cake is potassium dihydrogen phosphate product; add CaSO to the filtrate 4 , MgSO 4 , ZnSO 4 , Fe 2 + Chelates, ...
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