A kind of illite-based slow-release potassium fertilizer and preparation method thereof
A technology for slow-release potassium fertilizer and illite, which is applied in the directions of potash fertilizer, inorganic fertilizer, fertilization device, etc., can solve the problems of high cost and complicated potash fertilizer process.
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[0024] A preparation method of illite-based slow-release potassium fertilizer, comprising:
[0025] The mixture of inorganic salt solution and illite-containing mineral powder is kept at 150-400°C for 1-48 hours to obtain the reactant, so that part of the potassium ions between the illite sheets can be released; the solid phase of the reactant is dried to obtain Slow-release potash fertilizer based on illite.
[0026] Insulate the inorganic salt solution and the mineral powder containing illite at 150-400°C for 1-48 hours, and some metal cations in the inorganic salt enter into the illite interlayer and ion-exchange with the potassium ions between the illite interlayer, thus opening The lamellar structure of illite provides a channel for the release of potassium ions inside illite, so the potassium ions between illite layers can be exchanged by external ions, so that the obtained potassium fertilizer has the effect of slow-release potassium ions.
[0027] Insulation at 150-40...
Embodiment 1
[0055] Embodiment 1 provides a kind of slow-release potash fertilizer based on illite, and this potash fertilizer is mainly made through the following steps:
[0056] Mix 1g of illite and a sodium chloride solution (24g of sodium chloride dissolved in 60mL of water) with 0.4mol of sodium chloride dissolved evenly, transfer the mixture into a reaction kettle, seal it well and place it in an oven at 5°C The temperature was raised to 200°C at a rate of 1 / min, kept for 12 hours, and then cooled naturally. The reacted sample is centrifuged, the solid phase product is washed with water, and dried to become potassium fertilizer.
[0057] Potassium fertilizers were analyzed by X-ray diffraction (XRD). figure 1 The XRD pattern of the potassium fertilizer obtained in Example 1 is shown.
[0058] from figure 1 It can be seen that the potassium fertilizer obtained in Example 1 still exhibits the characteristic diffraction peaks of illite, indicating that the layered structure of illite...
Embodiment 2
[0063] Embodiment 2 provides a kind of slow-release potash fertilizer based on illite, and this potash fertilizer is mainly made through the following steps:
[0064] Mix 1g of illite with 1mol of sodium chloride and 1mol of lithium chloride solution (dissolve 85g of sodium chloride and 43g of lithium chloride in 150mL of water) evenly, transfer the mixture into a reaction kettle, seal it well and place it in an oven In the process, the temperature was raised to 180°C at a rate of 3°C / min, kept for 18 hours, and then cooled naturally. The reacted sample is centrifuged, the solid phase product is washed with water, and dried to become potassium fertilizer.
[0065] The method provided in Example 1 was used to measure the content of potassium in the illite slow-release potassium fertilizer of this example.
[0066] The result shows that the potassium content in the material of Example 2 is 88% of the original illite potassium content, showing that the remaining 88% potassium io...
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