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Easily degradable vegetable oil-coated controlled-release fertilizer and technology for preparing same

A technology of coated controlled-release fertilizers and vegetable oils, applied in fertilization devices, fertilizer mixtures, applications, etc., can solve the problems of slow degradation of membrane shells and high prices, and achieve the effects of protecting the environment, reducing fertilization costs, and avoiding agricultural non-point source pollution

Active Publication Date: 2014-01-29
KINGENTA ECOLOGICAL ENG GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems of high price of organic polymer-coated controlled-release fertilizer and slow degradation of film shell in the prior art, the present invention provides an easily degradable vegetable oil-coated controlled-release fertilizer and its preparation process

Method used

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  • Easily degradable vegetable oil-coated controlled-release fertilizer and technology for preparing same
  • Easily degradable vegetable oil-coated controlled-release fertilizer and technology for preparing same
  • Easily degradable vegetable oil-coated controlled-release fertilizer and technology for preparing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Embodiment 1, vegetable oil coated urea

[0043] (1) Sieve and weigh 1000kg of granular urea, transport it to the granulator, and preheat it to 50-60°C.

[0044] (2) Component A: 10kg vegetable oil, 1kg glycerin, 4.5kg xylene, 0.5kg plant fiber, stir and react for 50min at 55-65℃ in the reactor;

[0045] Component B: Add 2kg of phthalic anhydride to 10kg of vegetable oil, and react in a reactor at 180°C for 1.2h.

[0046] Take component A and component B and mix evenly, which is the vegetable oil coating agent; set aside;

[0047] (3) Add the vegetable oil coating agent in step (2) to the granular urea in the granulator in step (1), the dosage of the vegetable oil coating agent is 1.4wt% of the weight of the core fertilizer, and keep the fertilizer temperature at 50~60°C , using the mutual friction of fertilizer particles, the vegetable oil spreads evenly on the surface of the moving fertilizer particles, and finally solidifies to form a smooth and dense film layer, c...

Embodiment 2

[0049] Embodiment 2, vegetable oil coated urea

[0050] (1) Sieve and weigh 1000kg of granular urea, transport it to the granulator, and preheat it to 50-60°C.

[0051] (2) Component A: 6.2kg of vegetable oil, 0.70kg of pentaerythritol, 2.79g of xylene, and 0.31kg of plant fiber were stirred and reacted in a reactor at 55-65°C for 1.2h;

[0052] Component B: add 1kg phthalic anhydride to 5kg vegetable oil, and react in the reactor at 110°C for 1.5h;

[0053] Mix component A and component B evenly, it is vegetable oil coating agent, set aside;

[0054] (3) Add the vegetable oil coating agent in step (2) to the granular urea in the granulator in step (1), the dosage of the vegetable oil coating agent is 1.6wt% of the weight of the core fertilizer, and keep the fertilizer temperature at 50~60°C , using the mutual friction of fertilizer particles, the vegetable oil spreads evenly on the surface of the moving fertilizer particles, and finally solidifies to form a smooth and dense...

Embodiment 3

[0056] Embodiment 3, vegetable oil coated controlled-release compound fertilizer

[0057] (1) Sieve and weigh 500kg of Shima 45% (15-15-15) granular fertilizer, transport it to the granulator, and preheat it to 50-60°C.

[0058] (2) Component A: Take 6kg of vegetable oil, 1.5kg of trimethylolpropane, 1.5g of xylene, and 0.3kg of plant fiber, and stir in a reactor at 55-65°C for 2 hours;

[0059] Component B: add 0.5kg isophthalic acid to 2.7kg vegetable oil, and react in a reactor at 130°C for 1.6h.

[0060] Mix component A and component B evenly, it is vegetable oil coating agent, set aside;

[0061] (3) Add the vegetable oil coating agent in step (2) to the granular urea in the granulator in step (1), the dosage of the vegetable oil coating agent is 2.5wt% of the weight of the core fertilizer, and keep the fertilizer temperature at 50~60°C , using the mutual friction of fertilizer particles, the vegetable oil spreads evenly on the surface of the moving fertilizer particles...

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Abstract

The invention relates to an easily degradable vegetable oil-coated controlled-release fertilizer and a technology for preparing the same. The vegetable oil-coated controlled-release fertilizer comprises a core fertilizer and a vegetable oil-coated layer which wraps the core fertilizer, wherein the total coating ratio is 2-12wt%, a vegetable oil coating agent consists of a component A and a components B as follows: the component A is obtained through reacting 18-22 parts of vegetable oil, 2-5 parts of polyhydric alcohol, 7-10 parts of dimethylbenzene and 1 part of vegetable fiber by weight under stirring for 0.8-2 hours in a reactor under the condition of 55-65 DEG C; and the component B is obtained through adding 2-4 parts of polyprotic acid or acid anhydride into 8-12 parts of the vegetable oil by weight to be activated for 1-2 hours at 110-180 DEG C. The technology is simple, the nutrient controlled-release period of a product can be controlled at 1-9 months, and nutrients are accurately controlled to release, so the fertilizer utilization ratio is increased, and pollution is reduced.

Description

technical field [0001] The invention belongs to the field of controlled-release fertilizer production, and in particular relates to an easily degradable vegetable oil-coated controlled-release fertilizer and a preparation process thereof. 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G3/00C05G3/08C05G3/90
Inventor 陈剑秋郑磊张强王敏
Owner KINGENTA ECOLOGICAL ENG GRP
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