Preparation method of humic acid biostimulant and prepared biostimulant
A biostimulant, humic acid technology, applied in the field of humic acid growth stimulant, humic acid biostimulant and its preparation, can solve the problem of limiting the difference of humic acid, the molecular structure and composition of humic acid, and the research on the mechanism of humic acid Insufficient depth and other problems, to achieve the effect of improving anti-free radical ability, improving quality, and enhancing plant vitality
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Embodiment 1
[0035] A method for preparing a humic acid biostimulant, comprising the following steps: selecting lignite with an average organic matter content of 75%, pulverizing it to a particle size of not less than 120 mesh, and in the presence of an Ag-Pt catalyst, by mass ratio lignite powder: concentrated sulfuric acid: 10% hydrogen peroxide = 100:2:200, after mixing the three, react for 10 minutes under the ultrasonic cavitation effect at 80°C, then add water twice the weight of hydrogen peroxide and 5% sodium sulfite by weight of lignite powder, at 100°C Reflux for 1 hour, and reflux the aqueous phase to concentrate and dry to obtain the humic acid biostimulant.
Embodiment 2
[0037] A method for preparing a humic acid biostimulant, comprising the following steps: after lignite with an average organic matter content of 70% is pulverized to a particle size of not less than 120 mesh, in the presence of an Ag-Pt catalyst, the mass ratio is lignite powder: concentrated sulfuric acid: 8 % hydrogen peroxide = 100:3:220, after mixing the three, react for 18 minutes under ultrasonic cavitation effect at 70°C, then add water twice the weight of hydrogen peroxide and sodium sulfite with 5% weight of lignite powder, and reflux at 95°C After 1.2h, the aqueous phase was refluxed for concentration and drying to obtain the humic acid biostimulant.
Embodiment 3
[0039] A method for preparing a humic acid biostimulant, comprising the following steps: selecting lignite with an average organic matter content of 70%, pulverizing to a particle size of not less than 120 mesh, and in the presence of an Ag-Pt catalyst, by mass ratio lignite powder:concentrated sulfuric acid: 10% hydrogen peroxide = 100:2:180, after mixing the three, react for 15 minutes under the ultrasonic cavitation effect at 80°C, then add water twice the weight of hydrogen peroxide and 7% sodium sulfite of lignite powder, at 90°C Reflux for 1.5h, reflux the water phase for concentration and drying, and obtain the humic acid biostimulant.
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