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Preparation method of special carbon-based slow release fertilizer for wheat

A slow-release fertilizer, carbon-based technology, applied in the direction of ammonium salt fertilizer, fertilizer mixture, ammonium orthophosphate fertilizer, etc., can solve the problems of non-degradation and poor effect, and achieve the effect of improving the slow-release effect.

Active Publication Date: 2015-02-18
HUAIAN DAHUA BIO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of slow-release fertilizer is not effective when applied to wheat planting, and more synthetic resins are used in the preparation process, which is not easy to degrade in the soil

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The preparation method of special charcoal-based slow-release fertilizer for wheat, the steps are as follows:

[0026] Step 1: Take 50Kg of polyethylene wax and mix it evenly with 5Kg of acetic acid, 5Kg of starch, 5Kg of sodium bicarbonate and 20Kg of ethanol; then place the mixture in a tube furnace, heat up and carbonize in an atmosphere of inert gas The speed is 5°C / min, the carbonization temperature is 1100°C, and the carbonization time is 3 hours. After cooling, the solid residue is washed with 1wt% sodium hydroxide solution, then washed with pure water until neutral, dried, and ground to obtain carbon Microspheres;

[0027] Step 2: Mix carbon microspheres with 20Kg of urea, 10Kg of ammonium phosphate, 10Kg of ammonium sulfate, and 100Kg of water, heat up to 80°C, then cool to 1°C, filter out solids, and dry to obtain a fertilizer matrix;

[0028] Step 3. Mix 5Kg of cashew nut oil and 10Kg of hexamethylenetetramine in the reaction kettle, stir evenly, heat, the h...

Embodiment 2

[0032] The preparation method of special charcoal-based slow-release fertilizer for wheat, the steps are as follows:

[0033] Step 1: Take 65Kg of polyethylene wax, mix it evenly with 10Kg of acetic acid, 12Kg of starch, 10Kg of sodium bicarbonate and 30Kg of ethanol; then place the mixture in a tube furnace, heat up and carbonize in an atmosphere of inert gas The rate is 10°C / min, the carbonization temperature is 1200°C, and the carbonization time is 5 hours. After cooling, the solid residue is washed with 1wt% sodium hydroxide solution, then washed with pure water until neutral, dried, and ground to obtain carbon Microspheres;

[0034] Step 2: Mix carbon microspheres with 30Kg of urea, 20Kg of ammonium phosphate, 20Kg of ammonium sulfate, and 150Kg of water, heat up to 90°C, then cool to 3°C, filter out solids, and dry to obtain a fertilizer matrix;

[0035] Step 3. Mix 7Kg of cashew nut oil and 12Kg of hexamethylenetetramine in the reaction kettle, stir evenly, heat, the h...

Embodiment 3

[0039] The preparation method of special charcoal-based slow-release fertilizer for wheat, the steps are as follows:

[0040] Step 1: Take 60Kg of polyethylene wax and mix it evenly with 8Kg of acetic acid, 10Kg of starch, 7Kg of sodium bicarbonate and 25Kg of ethanol; then place the mixture in a tube furnace and heat up for carbonization in an atmosphere of inert gas. The speed is 8°C / min, the carbonization temperature is 1100°C, and the carbonization time is 5 hours. After cooling, the solid residue is washed with 1wt% sodium hydroxide solution, and then washed with pure water until neutral. After drying, it is ground to obtain carbon Microspheres;

[0041] Step 2: Mix carbon microspheres with 25Kg of urea, 15Kg of ammonium phosphate, 15Kg of ammonium sulfate, and 120Kg of water, heat up to 85°C, then cool to 2°C, filter out solids, and dry to obtain a fertilizer matrix;

[0042] Step 3. Mix 6Kg of cashew nut oil and 11Kg of hexamethylenetetramine in the reaction kettle, st...

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Abstract

The invention relates to a preparation method of a special carbon-based slow release fertilizer for wheat, and belongs to the technical field of fertilizers. The preparation method comprises the following steps: uniformly mixing polyethylene wax with organic acid, starch, sodium bicarbonate and an alcohols solvent; then placing a mixture into a tube furnace, increasing temperature for carbonization at an inert gas atmosphere, cooling, washing solid residues by using a sodium hydroxide solution, drying, and then grinding to obtain a carbon microsphere; uniformly mixing the carbon microsphere with urea, ammonium phosphate, ammonium sulfate and water, increasing the temperature, cooling, filtering out a solid, and drying to obtain a fertilizer base body; mixing cashew nut oil and hexamethylene tetramine in a reaction kettle, uniformly stirring, then heating, keeping the temperature and cooling, then adding polyhydric alcohol and polyisocyanate, uniformly stirring and mixing, and cooling to room temperature to obtain a coating agent; and placing the fertilizer base body into a fluidized bed coating machine, spraying the coating agent on the rolling fertilizer base body, and drying to obtain a coated fertilizer.

Description

[0001] technical field [0002] The invention relates to a preparation method of a special carbon-based slow-release fertilizer for wheat, which belongs to the technical field of fertilizers. [0003] Background technique [0004] At present, the utilization rates of nitrogen, phosphorus and potassium fertilizers in my country are 30%-35%, 10%-20% and 35%-50% respectively, 10-15 percentage points lower than developed countries. On this basis, the development of controlled-release fertilizers is of great significance for reducing fertilizer consumption and environmental pollution. The advantages of controlled-release fertilizers include: 1. The nutrient release rate of fertilizers is basically consistent with the law of crop fertilizer requirements: reducing the number of fertilization times and saving labor costs. The application before sowing can meet the needs of crops throughout the growth period, and reduce the cost of topdressing fertilizers for farmers. human, ma...

Claims

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Application Information

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IPC IPC(8): C05G3/00
CPCC05B7/00C05G5/30C05G5/37C05C3/00C05C9/00C05D9/00
Inventor 李杰
Owner HUAIAN DAHUA BIO TECH
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