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Thermoplastic resin membrane wrapping control-releasing fertilizer and production method thereof

A thermoplastic resin, coated controlled-release fertilizer technology, applied in the form of fertilizer, fertilization device, fertilizer mixture, etc., can solve the problems of scientific fertilization technology, low education level, too much time and energy, etc., and achieve a significant increase in production and synergistic effect, wide application prospect, excellent quality and effect effect

Active Publication Date: 2009-02-11
KINGENTA ECOLOGICAL ENG GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One of the reasons why my country's fertilizer utilization rate is lower than that of developed countries is that the series of scientific fertilization techniques adopted in developed countries are difficult to work in China
The education level of farmers in our country is low, the land area of ​​farmers is small and scattered, the planting system is complex, the degree of mechanization is low, the agrochemical service system is difficult to establish and in place, and it is difficult to provide convenient services for farmers with formula fertilization and other technical measures; farmers are no longer willing to spend too much time and energy on agronomic operations such as topdressing

Method used

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  • Thermoplastic resin membrane wrapping control-releasing fertilizer and production method thereof
  • Thermoplastic resin membrane wrapping control-releasing fertilizer and production method thereof
  • Thermoplastic resin membrane wrapping control-releasing fertilizer and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Embodiment 1: take turpentine as solvent, produce coated urea with polyethylene. Proceed as follows:

[0039] 1) 4500kg turpentine is added to the dissolving kettle;

[0040] 2) Add 300kg polyethylene, 50kg sodium dodecylbenzenesulfonate and 25kg paraffin into the dissolution kettle, stir and dissolve at 110°C to make a coating solution;

[0041] 3) Feed nitrogen into the fluidized bed, add 3000kg granular fertilizer urea to make it in a fluidized state and preheat to 40°C;

[0042] 4) Pressurize the coating solution to 0.5MPa, spray it on the surface of the fertilizer particles through the nozzle in the fluidized bed, the organic solvent evaporates rapidly, and the thermoplastic resin remains on the surface of the particles to form a smooth and dense film, and the finished thermoplastic coated urea is obtained.

[0043]The gas containing turpentine can be recycled after being condensed and recovered.

Embodiment 2

[0044] Example 2: Using tetrachlorethylene as a solvent to produce coated compound fertilizer with a mixture of polyethylene and polystyrene.

[0045] 1) 2500kg tetrachlorethylene is added to the dissolution kettle;

[0046] 2) Add 100kg of polyethylene and polystyrene mixture (70kg of polyethylene and 30kg of polystyrene), 20kg of sodium dodecylbenzenesulfonate and 10kg of paraffin into the dissolution kettle, stir and dissolve at 125°C to make a coating solution;

[0047] 3) Pass air into the fluidized bed, add 2500kg granular fertilizer compound fertilizer to make it in a fluidized state and preheat to 50°C;

[0048] 4) Pressurize the coating solution to 1.5MPa, spray it on the surface of the fertilizer particles through the nozzle in the fluidized bed, the organic solvent will evaporate quickly, and the thermoplastic resin will remain on the surface of the particles to form a smooth and dense film, and the finished thermoplastic coating compound is obtained Fat.

Embodiment 3

[0049] Embodiment 3: take the mixture of turpentine and tetrachlorethylene as solvent, produce coated ammonium sulfate with polyethylene. Proceed as follows:

[0050] 1) the mixture of 4500kg turpentine and perchlorethylene is added to the dissolution kettle;

[0051] 2) Add 265kg of polyethylene, 102kg of sodium dodecylbenzenesulfonate and 33kg of paraffin into the dissolution kettle, stir and dissolve at 115°C to make a coating solution;

[0052] 3) Air is introduced into the fluidized bed, and 5300kg of granular fertilizer ammonium sulfate is added to make it in a fluidized state and preheated to 45°C;

[0053] 4) Pressurize the coating solution to 1.0MPa, spray it on the surface of the fertilizer particles through the nozzle in the fluidized bed, the organic solvent evaporates rapidly, and the thermoplastic resin remains on the surface of the particles to form a smooth and dense film, and the finished thermoplastic coated ammonium sulfate is obtained .

[0054] The gas ...

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Abstract

The invention discloses a thermoplastic resin coating release-controlled fertilizer. The preparation method is as follows: coating solution is prepared: gas is fed to a fluidized bed, and granulated fertilizers are added, thus leading the mixture to be in a fluidization state and being preheated; the coating solution is sprayed to the particle surface of the fertilizer, thus obtaining the finished thermoplastic resin coating release-controlled fertilizer. The nutrient release-controlled period of the fertilizer can be adjusted according to the coating thickness and the addition of conditioners and can be controlled accurately for a long time which differs from one month to 12 months; the release-controlled effect is perfect.

Description

technical field [0001] The invention belongs to the field of chemical products, and in particular relates to a thermoplastic resin-coated controlled-release fertilizer product and a production method thereof. Background technique [0002] my country's fertilizer consumption accounts for about 20-30% of the world's total 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-re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05G5/00
Inventor 万连步张晓义徐恒军
Owner KINGENTA ECOLOGICAL ENG GRP
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