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Degradable high polymer film-coated controlled release fertilizer

A high molecular polymer and controlled-release fertilizer technology, which is applied in the form of fertilizer, fertilizer mixture, fertilization device, etc., can solve the problem of general slow and controlled release effect, high molecular polymer coating material is difficult to degrade or the degradation time is long, and it is difficult to achieve Fertilizer nutrient release rate and other issues, to achieve a wide range of application prospects, conducive to the protection of the agricultural ecological environment, the effect of excellent explosion-proof performance

Active Publication Date: 2012-09-26
KINGENTA ECOLOGICAL ENG GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The slow and controlled release effect of inorganic coated fertilizers on nutrients is general, and it is difficult to meet the requirement that the nutrient release rate of fertilizers is consistent with the nutrient demand rate of crops; It is widely used in flowers, landscape plants, golf courses, etc., and the effect is very remarkable; however, polymer coating materials are generally difficult to degrade or take a long time to degrade, so the choice of membrane materials and manufacturing processes is the best way to produce degradable packaging with excellent performance. The Key to Membrane Controlled-Release Fertilizers

Method used

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  • Degradable high polymer film-coated controlled release fertilizer
  • Degradable high polymer film-coated controlled release fertilizer
  • Degradable high polymer film-coated controlled release fertilizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1 Production of degradable coated controlled-release urea (44-0-0) with controlled release period of 2 months

[0022] Weigh 38kg of natural rubber and 2kg of EVA, heat to 110-130°C in 240kg of ethyl acetate and 360kg of dichloromethane mixture, stir and dissolve, and configure it as a spraying solution; 1000kg of large-grain urea (2.0-4.75mm) is fluidized The bed is preheated with hot air at 85-110°C, and the coating liquid is sprayed onto the surface of the suspended and fluidized urea particles through the nozzle. Under the action of the hot air, the solvent evaporates rapidly, and the coating material Wrapped on the surface of fertilizer granules to form a dry, smooth and dense film layer, through the continuous spraying of the coating liquid, until the coating process is completed, the coated controlled-release urea (44- 0-0), the volatilized solvent is recovered and recycled, and the product is packaged and put into storage.

Embodiment 2

[0023] Example 2 Production of degradable coated controlled-release compound fertilizer (20-8-10) with controlled release period of 3 months

[0024] Weigh 45kg of natural rubber and 5kg of EVA, heat to 110-130°C in 450kg of ethyl acetate and 450kg of dichloromethane mixture, stir and dissolve, and configure it as a spray solution; 1000kg of large-grained urea (2.0-4.75mm) is fluidized The bed is preheated with hot air at 85-110°C, and the coating liquid is sprayed onto the surface of the suspended and fluidized urea particles through the nozzle. Under the action of the hot air, the solvent evaporates rapidly, and the coating material Wrapped on the surface of the fertilizer particles to form a dry, smooth and compact film layer, through continuous spraying of the coating liquid, until the coating process is completed, the coated controlled-release compound fertilizer (20 -8-10), the volatilized solvent is recovered and recycled, and the product is packaged and put into storag...

Embodiment 3

[0025] Example 3 Manufacture of degradable coated controlled-release urea (42-0-0) with controlled release period of 6 months

[0026] Weigh 63kg of natural rubber and 7kg of EVA, heat to 110-130°C in 630kg of ethyl acetate and 630kg of dichloromethane mixture, stir and dissolve, and configure it as a spray solution; 1000kg of large-grain urea (2.0-4.75mm) is fluidized The bed is preheated with hot air at 85-110°C, and the coating liquid is sprayed onto the surface of the suspended and fluidized urea particles through the nozzle. Under the action of the hot air, the solvent evaporates rapidly, and the coating material Wrapped on the surface of the fertilizer particles to form a dry, smooth and dense film layer, through continuous spraying of the coating liquid, until the coating process is completed, the coated controlled-release urea (42- 0-0), the volatilized solvent is recovered and recycled, and the product is packaged and put into storage.

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Abstract

The invention discloses a degradable high polymer film-coated controlled release fertilizer. The degradable high polymer film-coated controlled release fertilizer has the particle size range of 2.0 to 5.0mm, the coating rate of 2 to 10 percent and the nutrient release period of 1 to 10 months. A film-coated material has good biodegradability, so a film shell can be degraded quickly after the fertilizer is applied, and the controlled release fertilizer is favorable for protecting the agricultural ecological environment. The nutrient release period of the product can be controlled between 1 and12 months accurately. In addition, products with different release periods and different release characteristics can be blended in a certain proportion and made into specific film-coated controlled release fertilizers special for various crops by simulating the nutrient demands of the various crops, and nutrient release curves of the controlled release fertilizers are made to coincide with nutrient uptake curves of the crops to achieve the aim of controlling the release of the nutrient accurately.

Description

technical field [0001] The invention belongs to the field of chemical products, and in particular relates to a degradable polymer-coated controlled-release fertilizer product. Background technique [0002] my country's chemical fertilizer consumption accounts for about 20-30% of the world's total chemical fertilizer consumption, ranking first in the world. The average seasonal utilization rate of chemical fertilizers in developed countries is 50-60%, and the average seasonal utilization rate of chemical fertilizers in my country is only 30-35%. . The loss and waste of a large number of nutrients not only bring huge economic losses to the society, but also cause serious environmental pollution. At present, with the continuous increase in the amount of chemical fertilizers, the modification of fertilizers is even more important under the multiple goals of pursuing both yield and quality of agricultural products and environmental friendliness. Developing slow-release and contr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G3/00C05G5/00C05G3/08C05G3/90
Inventor 高义武陈剑秋陈德清徐淑班
Owner KINGENTA ECOLOGICAL ENG GRP
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