Coated fertilizer and preparation method thereof

A technology of coating and coating layer, applied in fertilizer mixture, fertilization device, application and other directions, can solve the problems of pollution, quality reduction of agricultural products, threats, etc., and achieve the effects of simple production process, reduced degradation time, and reduced processing cost.

Inactive Publication Date: 2012-09-19
三河市香丰肥业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are two problems in the application of chemical fertilizers in my country: one is the large amount of chemical fertilizers used and the utilization rate is low; the other is that the unreasonable application of chemical fertilizers causes environmental pollution and reduces the quality of agricultural products
[0004] Non-hydrophilic polymer resin coating materials, especially fertilizers coated with thermoplastic polymer materials, such as polyethylene, polypropylene, and polystyrene, can better meet the requirements of controlled release of nutrients, but The use of coating materials has brought two fatal weaknesses: expensive price and environmental threat
Such defects greatly limit the scope of application of this type of fertilizer in agricultural production. In addition, complex production technology conditions, material selection, fine process routes, large research teams and high research expenditures are not suitable for our country. Existing Conditions and Sustainable Development Direction of Agriculture

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1: Polyethylene: Cellulose=0.5:1

[0027] Coated fertilizer ingredients: 100 parts of urea, the material of the coating layer is a mixture of polyethylene and cellulose, its content is 15% of the weight of urea, that is, 15 parts, and the film thickness is 0.1mm. Wherein, the particle size of urea is 3mm, polyethylene:methylcellulose=0.5:1, and the average degree of polymerization of methylcellulose is 5000.

[0028] Preparation method: step (1), dissolve 15 parts of polyethylene and cellulose mixture in 75 parts of vegetable oil solvent, stir evenly to obtain coating solution; step (2), pour urea into a heating and drying drum, roll And preheat to 65℃~75℃; then the drum rolls at 60 rpm, and at the same time, the coating solution prepared in step (1) is sent to the atomizing nozzle through a pump or under pressure, and atomized Spraying onto the fertilizer particles in the drum, wherein the atomizing nozzle is a pressure type nozzle, the atomizing pressure rang...

Embodiment 2

[0029] Embodiment 2: polyethylene: cellulose = 1: 1

[0030] Coated fertilizer ingredients: 100 parts of urea, the coating layer is a mixture of polyethylene and cellulose, its content is 20% of the weight of urea, that is, 20 parts, and the film thickness is 0.15mm. Wherein, the particle size of urea is 3mm, polyethylene:methylcellulose=1:1, and the average degree of polymerization of methylcellulose is 3000.

[0031] Preparation method: step (1), dissolve 20 parts of polyethylene and cellulose mixture in 200 parts of vegetable oil solvent, stir evenly to obtain coating solution; step (2), pour urea into a heating and drying drum, roll And preheat to 65℃~75℃; then the drum rolls at 60 rpm, and at the same time, the coating solution prepared in step (1) is sent to the atomizing nozzle through a pump or under pressure, and atomized Spraying onto the fertilizer particles in the drum, wherein the atomizing nozzle is a pressure type nozzle, the atomizing pressure range is 0.015MP...

Embodiment 3

[0032] Embodiment 3: polyethylene: cellulose = 1: 0.5

[0033] Coated fertilizer ingredients: 100 parts of urea, the coating layer is a mixture of polyethylene and cellulose, its content is 25% of the weight of urea, that is, 25 parts, and the film thickness is 0.2mm. Wherein, the particle size of urea is 4mm, polyethylene:methylcellulose=1:0.5, and the average degree of polymerization of methylcellulose is 400.

[0034] Preparation method: step (1), dissolve 25 parts of polyethylene and cellulose mixture in 375 parts of vegetable oil solvent, stir evenly to obtain coating liquid; step (2), pour urea into a heating and drying drum, roll And preheat to 65℃~75℃; then the drum rolls at 60 rpm, and at the same time, the coating solution prepared in step (1) is sent to the atomizing nozzle through a pump or under pressure, and atomized Spraying onto the fertilizer particles in the drum, wherein the atomizing nozzle is a pressure type nozzle, the atomizing pressure range is 0.015MP...

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PUM

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Abstract

The invention provides a coated fertilizer with polyethylene and cellulose as a coated layer and a preparation method thereof. The coated fertilizer is prepared by utilizing fertilizer particles as a core and evenly coating a coated film material on the outer surface of the core. The coated film comprises the polyethylene and the cellulose, and the weight ratio of the polyethylene and the cellulose is 0.5:1-1:0.5. Dosage of the coated film is 10-25% of the weight of the core of the fertilizer, and the thin film thickness is 0.05-0.2mm. The coated film material is an environment-friendly fertilizer, is long in control release time and high in degradation rate and N utilization ratio. The coated fertilizer is simple in preparation process and low in cost and has remarkable effect on afterreap crops.

Description

technical field [0001] The invention relates to a coated fertilizer and a preparation method thereof, in particular to a coated fertilizer with polyethylene and cellulose as the coating layer and a preparation method thereof. Background technique [0002] As we all know, chemical fertilizers are the "grain" of food. At present, there are two problems in the application of chemical fertilizers in our country: one is the large amount of chemical fertilizers used and the utilization rate is low; the other is that the unreasonable application of chemical fertilizers causes environmental pollution and reduces the quality of agricultural products. According to statistics, the loss caused by the loss of chemical fertilizers in my country every year reaches 100 billion yuan, which is equivalent to 100 chemical fertilizer factories dumping their products in vain; 50%-70% of nitrogen fertilizer enters water bodies and the atmosphere, and the nitrogen flowing into rivers and lakes lead...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05G3/08C05G3/90
Inventor 高慧丰
Owner 三河市香丰肥业有限公司
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