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Coating pulp for controlled release fertilizer and production method and application thereof

A controlled-release fertilizer and coating technology, which is applied in the direction of fertilizer mixture, application, fertilization device, etc., can solve soil environmental problems and other problems, and achieve the effects of saving energy, reducing preparation temperature, and reducing dosage

Inactive Publication Date: 2011-09-14
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the polymer that is difficult to degrade is used as a coating for a long time, it will inevitably bring serious environmental problems to the soil.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0016] 1. Crush 5kg of rice straw, soak it in 9kg of water for 2 days, o Stir under C conditions to form a slurry. After standing still, the upper layer of waste water is completely reused as the process water for the next straw pulping. Obtain the straw thick slurry of lower floor.

[0017] 2. Dissolve 1.6kg of high-polychitosan in 1.0kg of prepared industrial hydrochloric acid with a mass concentration of 6% to make high-polychitosan syrup.

[0018] 3. Mixing and stirring the straw thick slurry and the high-poly chitosan syrup to prepare the straw and chitosan controlled-release coated slurry.

[0019] 4. Dip 50 kg of prepared urea granules with a diameter of about 1 to 10 mm into the controlled-release coating slurry.

[0020] 5. Dry and solidify the fertilizer granules wrapped by the controlled-release film in dry ammonia to obtain biological controlled-release urea fertilizer.

[0021] 6. Detection:

[0022] In this fertilizer, the quality of rice straw accounts for ...

example 2

[0025] 1. Crush 5kg of wheat straw and soak it in 9kg of water for 2 days. o Stir under C conditions to form a slurry. After standing still, the upper layer of waste water is completely reused as the process water for the next straw pulping. The lower layer is straw thick slurry.

[0026] 2. Dissolve 1.6kg of high-polychitosan in 1.0kg of prepared 6% industrial hydrochloric acid to make high-polychitosan syrup.

[0027] 3. Mixing and stirring the concentrated straw slurry and the high-poly chitosan syrup to prepare the straw / chitosan controlled-release coated slurry.

[0028] 4. Dip 50 kg of prepared urea granules with a diameter of about 1 to 10 mm into the controlled-release coating slurry.

[0029] 5. Dry and solidify the fertilizer granules wrapped by the controlled-release film in dry ammonia to obtain biological controlled-release urea fertilizer.

[0030] 6. Detection:

[0031] In this fertilizer, the quality of rice straw accounts for 8.2%; the quality of polychit...

example 3

[0034] 1. Crush 5kg of rice straw, soak it in 9kg of water for 2 days, o Stir under C conditions to form a slurry. After standing still, the upper layer of waste water is completely reused as the process water for the next straw pulping. The lower layer is straw thick slurry.

[0035] 2. Dissolve 1.6kg of high-polychitosan in 1.0kg of prepared 6% industrial hydrochloric acid to make high-polychitosan syrup.

[0036] 3. Mixing and stirring the concentrated straw slurry and the high-poly chitosan syrup to make a controlled-release coated slurry.

[0037] 4. Spray the controlled-release coated slurry on the surface of 50kg of prepared urea particles with a diameter of about 1-10mm.

[0038] 5. Dry and solidify in dry ammonia gas to obtain biological controlled release urea fertilizer.

[0039] 6. Detection:

[0040] In this fertilizer, the quality of rice straw accounts for 8.3%; the quality of polychitosan accounts for 2.6%; the quality of urea accounts for 79.5%; the quali...

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Abstract

The invention relates to a coating pulp for a controlled release fertilizer and a production method and application thereof, belonging to the technical field of fertilizer industry. The production method of the coating pulp includes the following steps: preparing rice straw or wheat straw into straw thickened pulp; mixing diluted hydrochloric acid with high-density chitosan, and stirring the mixture into high-density chitosan pulp under the condition of 30-50 DEG C; and then mixing the straw thickened pulp with the high-density chitosan pulp, thus obtaining the coating pulp. In ammonia atmosphere, a granular fertilizer is immersed in the coating pulp to form a wrapping film on the surface of the granular fertilizer by the coating pulp; and then the granular fertilizer is dried and cured in dry ammonia atmosphere, thus obtaining the coated biological controlled release fertilizer. The coating pulp also can be sprayed on the surface of the granular fertilizer in the ammonia atmosphere to form the wrapping film on the surface of the granular fertilizer by the coating pulp; and then the granular fertilizer is dried and cured in the dry ammonia atmosphere, thus obtaining the coated biological controlled release fertilizer. The invention can be used for producing the controlled release fertilizer with the coating pulp, and is applicable to the production for preparing an inorganic fertilizer or a compound fertilizer into the biological type controlled release fertilizer.

Description

technical field [0001] The invention belongs to the technical field of fertilizer industry, in particular to the technical field of production of coating materials for slow-release and controlled-release fertilizers. Background technique [0002] In recent years, the production and consumption of slow-release / controlled-release fertilizers at home and abroad have been growing steadily, mainly for non-agricultural fields and consumer households, and no major breakthroughs have been made in the agricultural field. They are veritable "noble fertilizers" . my country is a big country in the production and application of chemical fertilizers, but it is not yet a powerful country in the production and application of chemical fertilizers. At present, global inflation, food and energy are all rising. Although my country's food production has increased for many years in a row, the rapid rise in the prices of chemical fertilizers and other agricultural materials still brings a certai...

Claims

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Application Information

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IPC IPC(8): C05G3/00
Inventor 刘天晴刘燕
Owner YANGZHOU UNIV
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