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Preparation material of slow-release fertilizer coating agent based on alkenyl succinic anhydride

A technology of alkenyl succinic anhydride and slow-release fertilizers, applied in fertilizer mixtures, layered/coated fertilizers, fertilization devices, etc., can solve the problems of complex production process, high reaction temperature, slow coating speed, etc., and achieve the transportation process Convenience, good reactivity, good toughness and binding effect

Inactive Publication Date: 2020-09-01
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] These methods generally have problems such as complex production process, high reaction temperature, long coating time, high production cost, and slow coating speed.

Method used

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  • Preparation material of slow-release fertilizer coating agent based on alkenyl succinic anhydride
  • Preparation material of slow-release fertilizer coating agent based on alkenyl succinic anhydride

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Disperse 30kg of p-aminophenol, 33kg of maleic anhydride, and 30kg of styrene-acrylic acid ester emulsion evenly in 150kg of ethanol, use ammonia water to adjust PH=7, add 0.5kg of potassium persulfate, 1kg of sodium fatty acid and 1,5kg Polyoxyethylene octylphenol ether-10 was stirred at a speed of 3000r / min for 1min with a high-speed shear dispersing emulsifier to obtain a solid particle suspension; The emulsifier was stirred at 2000r / min for 5 minutes to prepare a certain mass fraction of alkenyl succinic anhydride (ASA) slow-release fertilizer coating solution.

[0025] Soak the fertilizer granules in the coating solution for 10 minutes, then take them out, and dry them at 60°C for 4 hours to obtain the coated fertilizer.

Embodiment 2

[0027] Disperse 15kg of styrene-acrylate emulsion, 10kg of p-aminophenol and 11kg of maleic anhydride in 100kg of ethanol, adjust the pH to 7.5 with ammonia water and add 1kg of potassium persulfate, 1kg of sodium fatty acid and 1.5kg of poly Oxyethylene octylphenol ether-10, stirred at 2000r / min for 1min with a high-speed shear dispersing emulsifier to obtain a solid particle suspension; then add 40kg of alkenyl succinic anhydride (ASA), and emulsify with high-speed shear at room temperature The machine was stirred at 1500r / min for 8 minutes to prepare a certain mass fraction of alkenyl succinic anhydride (ASA) slow-release fertilizer coating solution.

[0028] Soak the fertilizer granules in the coating solution for 10 minutes, then take them out, and dry them at 60°C for 4 hours to obtain the coated fertilizer.

Embodiment 3

[0030] Disperse 10kg of p-aminophenol and 33kg of maleic anhydride evenly in 120kg of ethanol, adjust the pH to 6.5 with ammonia water, then add 1.5kg of potassium persulfate, 1kg of sodium fatty acid and 1kg of polyoxyethylene octylphenol ether- 10. Stir at 3000r / min with a high-speed shear emulsifier for 1min to obtain a suspension of solid particles, then add 50kg of alkenyl succinic anhydride (ASA), and use a high-speed shear emulsifier at room temperature at 1000r / min Stir for 2 minutes to prepare a certain mass fraction of alkenyl succinic anhydride (ASA) slow-release fertilizer coating solution.

[0031] Soak the fertilizer granules in the coating solution for 10 minutes, then take them out, and dry them at 60°C for 4 hours to obtain the coated fertilizer.

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Abstract

The invention relates to a preparation method of a slow-release fertilizer coating agent based on alkenyl succinic anhydride (ASA). The preparation method comprises the following steps: mixing one ormore reactants of p-aminophenol 1, maleic anhydride and a styrene-acrylate emulsion with ethanol; adding sodium aliphatate, polyoxyethylene octylphenol ether-10 and potassium peroxodisulfate after pHvalue adjustment to obtain a solid particle suspension; and then adding alkenyl succinic anhydride, and stirring by using a high-speed shearing emulsifying machine at room temperature to obtain an alkenyl succinic anhydride (ASA) slow-release fertilizer coating solution. The preparation method disclosed by the invention has good reactivity at normal temperature, and the coating agent is easy to prepare and simple in coating process. The coating agent is granular, has good stability, toughness and combinability, can well coat a fertilizer, and has high strength, compression resistance, fallingresistance and the like.

Description

technical field [0001] The invention provides a method for preparing a slow-release fertilizer coating agent based on alkenyl succinic anhydride (ASA), specifically synthesizing a composite polymer to prepare a slow-release composite fertilizer coating material, which belongs to the field of fertilizer technology and also belongs to material science field. Background technique [0002] Coated fertilizers are also called physical controlled-release fertilizers. Generally, the film-forming material is coated on the surface of fertilizer particles by spraying to form a dense film layer, which inhibits and blocks the passage of water, makes the fertilizer slowly dissolve, and delays the fertilizer nutrients from flowing out. release rate, so as to improve the slow-release performance of fertilizers. In the process, water-soluble fertilizer particles are coated with substances with low water permeability to control the entry of water. After the nutrient solution inside the fertil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/40C05G5/30
CPCC05G3/40C05G5/37
Inventor 翁景峥彭黎波卢合欢童庆松
Owner FUJIAN NORMAL UNIV
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