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Preparation of biological degradable macromolecule slow-controlled release organic nano fertilizer with multiple nutrient elements

A nutrient element, biodegradation technology, applied in urea compound fertilizer, nitrogen fertilizer, phosphate fertilizer and other directions, can solve the problems of complex process, expensive equipment, difficult to large-scale industrial production, etc., achieve simple and efficient preparation process, reduce crystallinity, The effect of excellent sustained release properties

Active Publication Date: 2019-09-20
ZHONGBEI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation of the above-mentioned nano-fertilizers requires high-speed shear dispersion, in-situ growth, self-assembly, solvothermal method, etc., the process is complicated, the equipment is expensive, and it is difficult to be used in large-scale industrial production.

Method used

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  • Preparation of biological degradable macromolecule slow-controlled release organic nano fertilizer with multiple nutrient elements
  • Preparation of biological degradable macromolecule slow-controlled release organic nano fertilizer with multiple nutrient elements
  • Preparation of biological degradable macromolecule slow-controlled release organic nano fertilizer with multiple nutrient elements

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The method for preparing a biodegradable polymer slow and controlled release organic nano-fertilizer containing multiple nutrient elements includes the following steps:

[0034] (1) Add 83.1g formaldehyde solution (37wt%) and 123.0g urea into the reactor respectively, adjust the pH of the system to 8, and react at 60℃ for 2h; then raise the temperature of the reaction system to 80℃, and add 10.0g diphosphoric acid Potassium hydrogen continues to react until the system is viscous;

[0035] (2) The obtained viscous product is granulated and dried to a constant weight at 100°C to obtain a biodegradable polymer slow-release organic nano-fertilizer containing multiple nutrient elements.

[0036] The nitrogen content of the obtained biodegradable polymer slow and controlled release organic nano-fertilizer containing multiple nutrient elements is 35.0wt%, and P 2 O 5 The calculated phosphorus content is 3.2wt%, in K 2 The potassium content based on O is 2.1 wt%.

Embodiment 2

[0038] The method for preparing a biodegradable polymer slow and controlled release organic nano-fertilizer containing multiple nutrient elements includes the following steps:

[0039] (1) Add 83.1g formaldehyde solution (37wt%) and 73.8g urea into the reactor, adjust the pH of the system to 10, and react at 40℃ for 2h; then raise the temperature of the reaction system to 60℃, and add 10.0g phosphoric acid Calcium continues to react until the system is viscous;

[0040] (2) The obtained viscous product is granulated and dried to a constant weight at 40°C to obtain a biodegradable polymer slow-release organic nano-fertilizer containing multiple nutrient elements.

[0041] The nitrogen content of the obtained biodegradable polymer slow-release organic nano-fertilizer containing multiple nutrient elements was 29.4wt%, 2 O 5 The calculated phosphorus content is 2.4wt%, based on K 2 The potassium content based on O is 0.0wt%.

Embodiment 3

[0043] The method for preparing a biodegradable polymer slow and controlled release organic nano-fertilizer containing multiple nutrient elements includes the following steps:

[0044] (1) Add 83.1g formaldehyde solution (37wt%) and 73.8g urea into the reactor, adjust the pH of the system to 8, and react at 40°C for 2h; then raise the temperature of the reaction system to 60°C, and add 66.0g diphosphoric acid Potassium hydrogen continues to react until the system is viscous;

[0045] (2) The obtained viscous product is granulated and dried to a constant weight at 100°C to obtain a biodegradable polymer slow-release organic nano-fertilizer containing multiple nutrient elements.

[0046] The nitrogen content of the obtained biodegradable polymer slow and controlled release organic nano-fertilizer containing multiple nutrient elements is 21.3wt%, 2 O 5 The calculated phosphorus content is 21.0wt%, in K 2 The potassium content based on O is 13.9% by weight.

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Abstract

The invention relates to the field of slow-controlled release chemical fertilizers and in particular to a preparation method of a biological degradable macromolecule slow-controlled release organic nano fertilizer with multiple nutrient elements. The preparation method specifically comprises the following steps: enabling a certain amount of formaldehyde and urea to react for a certain time at a certain temperature, increasing the temperature of the system to a set temperature, adding a certain amount of phosphate, and carrying out a reaction continuously till the system is thick; and pelletizing the obtained viscous product, and carrying out drying for a period of time at a set temperature, so as to obtain the biological degradable macromolecule slow-controlled release organic nano fertilizer with multiple nutrient elements. Nano phosphate in the biological degradable macromolecule slow-controlled release organic nano fertilizer with multiple nutrient elements is solidly combined among macromolecule chains of urea formaldehyde under the action of hydrogen bonds, nitrogen, phosphorus, potassium or other medium and trace elements have excellent slow release capabilities, and thus the utilization efficiency of the fertilizer can be greatly improved.

Description

Technical field [0001] The invention relates to the field of slow and controlled release fertilizers, in particular to a preparation method of a biodegradable polymer slow and controlled release organic nano-fertilizer containing multiple nutrient elements. Background technique [0002] Traditional fertilizers are easily volatilized, run off, leached or fixed by the soil, resulting in low nutrient utilization efficiency. The loss of nutrients that cannot be absorbed by plants to the surrounding environment will seriously pollute groundwater sources and cause eutrophication of rivers and lakes. In addition, long-term application of these fertilizers will also cause soil acidification or alkalization, damage the soil structure, make the soil compact, reduce the fertility quality, and ultimately lead to reduced crop yields and reduced crop quality. [0003] In order to improve the efficiency of fertilizer utilization, in addition to strengthening the research of agronomic technology,...

Claims

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Application Information

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IPC IPC(8): C05G3/00
CPCC05B7/00C05G3/00C05C9/02
Inventor 刘亚青向阳赵贵哲仝迎芳
Owner ZHONGBEI UNIV
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