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Mineral fertilizer water retention agent and preparation thereof

A technology of mineral fertilizer and water retention agent, which is applied in the field of agriculture and forestry to achieve the effects of low energy consumption, strong water retention capacity and short process flow

Inactive Publication Date: 2009-06-24
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In short, there is no domestic mineral fertilizer that embeds potassium mineral powder and phosphate rock powder in hydrogel, so that mineral potassium mineral phosphorus becomes active potassium active phosphorus and slow-release potassium persistent phosphorus in the hydrogel network. Agent patent application or patent authorization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Add 0.003 g of N,N'-methylene bisacrylamide 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, and dissolve. 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' methylene bisacrylamide and 0.75 grams of potassium persulfate under stirring, dissolve, and then mechanically pulverize, Add 85 grams of phosphate rock powder (phosphorus pentoxide content not less than 15 wt%) containing 5 grams of concentrated sulfuric acid, and stir or ultrasonically disperse 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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PUM

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Abstract

The invention relates to a mineral fertilizer water retention agent and a preparation method thereof, which is mainly applied to the field of agriculture and forestry. The mineral fertilizer water retention agent is characterized by being prepared by mixing, heating, polymerizing, drying and crushing raw material containing potassium powdered ore, powdered rock phosphate, activated release accelerating agent, water soluble monomer polymer, water, free radical polymerization evocating agent and cross linker; wherein, the adding weight of the potassium powdered ore is 0-300% of the weight of the water soluble monomer polymer, the adding weight of the powdered rock phosphate is 0-300% of the weight of the water soluble monomer polymer, and the adding weights of the potassium powdered ore and the powdered rock phosphate are not equal to zero simultaneously; the adding weight of the activated release accelerating agent is 0-200% of the weight of the water soluble monomer polymer, the adding weight of the free radical polymerization evocating agent is 0.01-1.0% of the weight of the water soluble monomer polymer, the adding weight of the cross linker is 0.01-2.0% of the weight of the water soluble monomer polymer, and the water soluble monomer polymer is dissolved in the water to form the water soluble monomer polymer solution with the weight concentration of 10-35wt%. The mineral fertilizer water retention agent is simple in preparation method and low in cost, can activate slightly soluble mineral potassium and mineral phosphate with low cost and energy consumption, and has the double functions of fertilizer and water retention.

Description

technical field [0001] The invention relates to a mineral fertilizer water-retaining agent and a preparation method thereof, which are mainly used in the field of agriculture and forestry. technical background [0002] Slow-release fertilizer is a new type of fertilizer with high technical content that regulates the release rate of nutrients. Its nutrient release rate can be regulated by physical, chemical and biotechnological means, so that the supply of nutrients in the fertilizer and the crop's demand for nutrients Basic synchronization to achieve dynamic balance [1-2] . The use of this new type of fertilizer can reduce the loss of nutrients and improve the utilization rate of fertilizers. [0003] Judging from the current situation of producing controlled-release fertilizers in the world, the types of controlled-release fertilizers that have been industrialized are mainly polymer-coated nitrogen, phosphorus, and potassium fertilizers, and their main raw materials are c...

Claims

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Application Information

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IPC IPC(8): C05G3/04C05D1/04C05B17/00C05G3/80
Inventor 范力仁尹秋英任卫卫张玺
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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