Mineral fertilizer water retention agent and preparation thereof
A technology of mineral fertilizers and water-retaining agents, applied in the field of agriculture and forestry, to achieve the effects of short process flow, strong water retention capacity, and large water absorption
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Embodiment 1
[0058] Add 0.003 g of N,N'-methylenebisacrylamide and 0.003 g of potassium persulfate to dissolve in 300 g of acrylic acid solution with a weight concentration of 10% and a neutralization degree of 100% with sodium hydroxide. Add 24 grams of mechanically crushed potassium ore powder (potassium oxide content not less than 5.0 wt%) and phosphate rock powder (phosphorus pentoxide content not less than 15 wt%) (containing 3 grams of sulfuric acid) and stir Or ultrasonically disperse for 10 minutes. Stir and heat the dispersed mixed material in the reactor at 40°C for 5 hours, then raise the temperature to 30°C for 5 hours to obtain a polymer product; The method is to crush it to 0.1-2.0mm, and finally obtain the mineral fertilizer water-retaining agent (granular product).
Embodiment 2
[0060] In 300 grams of acrylic acid solution with a weight concentration of 30% and a neutralization degree of 80%, add 0.09 grams of N, N'-methylenebisacrylamide and 0.09 grams of potassium persulfate under stirring, dissolve, and then mechanically pulverize 100 grams of potassium ore powder (potassium oxide content not less than 5.0 wt%) was added therein, stirred or ultrasonically dispersed for 10 minutes. Heat the dispersed mixed material in the reactor at 90°C for 1 hour, then raise the temperature to 10°C and react for 1 hour to obtain a polymer product; the polymer product is dried at 100°C until the water content is less than 20%, and mechanically It is crushed to 0.1-2.0 mm, and finally a mineral fertilizer water-retaining agent (granular product) is obtained.
Embodiment 3
[0062] In 300 grams of acrylic acid solution with a weight concentration of 25% and a neutralization degree of 70%, add 1.5 grams of N,N'-methylenebisacrylamide and 0.75 grams of potassium persulfate under stirring, dissolve, and then mechanically pulverize , 85 grams of phosphate rock powder containing 5 grams of concentrated sulfuric acid (phosphorus pentoxide content not less than 15 wt%) was added therein, stirred or ultrasonically dispersed for 10 minutes. Heat the dispersed mixed material in the reactor at 70°C for 3 hours, then increase the temperature at 20°C for 2 hours to obtain a polymer product; dry the polymer product at 110°C until the water content is less than 20%, and use mechanical methods to It is crushed to 0.1-2.0 mm, and finally a mineral fertilizer water-retaining agent (granular product) is obtained.
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Abstract
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