Nitryl fertilizer containing activated mineral resource humic acid and preparation method thereof
A humic acid and fertilizer technology, applied in organic fertilizers, inorganic fertilizers, calcareous fertilizers, etc., can solve problems such as intractability, and achieve the effects of increasing content, reducing viscosity and increasing solubility
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[0039] A preparation method of a nitro fertilizer containing activated mineral source humic acid, comprising the following steps:
[0040] Mixing nitric acid and inorganic minerals, dissolving the inorganic minerals to obtain an acid hydrolyzate; adding mineral humic acid to the acid hydrolyzate, adding excess nitric acid for activation, and adding alkali to the activated acid hydrolyzate to neutralize the remaining nitric acid , evaporative concentration, granulation or pulverization, and drying to obtain the nitro fertilizer.
[0041] In the preparation method of the nitro fertilizer containing activated mineral humic acid provided by the present invention, a compound fertilizer is prepared by using mineral humic acid and inorganic minerals, and nitric acid is added for activation, and after activation, nitro groups are added to the humic acid molecules , Convert the mineral humic acid from the macromolecular part to the small molecule, reduce the content of black humic acid...
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[0067] Example 1
[0068] Nitrophosphate fertilizer is prepared by the method provided in this application, such as figure 1 shown, including the following steps:
[0069] Mix nitric acid with phosphate rock, dissolve the phosphate rock, separate insoluble matter, obtain an acid hydrolyzate, add sulfuric acid with an equimolar amount of calcium content in the phosphate rock, make calcium precipitate in the form of calcium sulfate, and filter to remove calcium sulfate; Peat humic acid is added to the hydrolysis solution, and nitric acid with 30% of the mass of peat humic acid is added for activation (plus the residual nitric acid in the acid hydrolysis solution, the nitric acid content is excessive relative to the mineral humic acid) to activate, and ammonia gas is introduced into the activated acid hydrolysis solution. Neutralize the remaining nitric acid, evaporate and concentrate, granulate and dry to obtain the nitrophosphate fertilizer.
Example Embodiment
[0071] Example 2
[0072] Nitrophosphate fertilizer is prepared by the method provided in this application, such as image 3 shown, including the following steps:
[0073] Mixing nitric acid and phosphate rock, dissolving the phosphate rock, separating the insoluble matter, to obtain an acid hydrolyzed solution, cooling the acid hydrolyzed solution to below -5 ° C, after the crystallization of calcium nitrate tetrahydrate, filtering to remove the calcium nitrate; in the acid hydrolyzed solution Add lignite humic acid, and add nitric acid with a mass of 50% of the lignite humic acid (plus the residual nitric acid in the acid hydrolysis solution, the nitric acid content is excessive relative to the mineral humic acid) to activate, and the activated acid hydrolyzed solution is passed into ammonia gas for neutralization The remaining nitric acid is evaporated, concentrated, granulated and dried to obtain the nitrophosphate fertilizer.
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