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Organic macromolecular controlled-release nitrogen-phosphorus fertilizer containing S, Fe, Mn and Cu and preparation method for fertilizer

An organic polymer, iron-manganese-copper technology, applied in fertilization devices, fertilizer mixtures, applications, etc., can solve problems such as iron deficiency in crops, and achieve the effects of increasing utilization rate, improving crop quality, and increasing crop yield

Inactive Publication Date: 2015-04-29
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the main method to solve the lack of trace elements such as iron, manganese, and copper in the soil is to apply inorganic fertilizers, but after being applied to the soil, iron, manganese, and copper ions are easily fixed by the soil, and the available iron, available manganese, and There is less available copper. Therefore, iron, manganese, and copper deficiency in crops in agricultural production are very common, especially in arid and semi-arid calcareous soils with high pH and rich in free calcium carbonate. The phenomenon of manganese and copper is more serious

Method used

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  • Organic macromolecular controlled-release nitrogen-phosphorus fertilizer containing S, Fe, Mn and Cu and preparation method for fertilizer
  • Organic macromolecular controlled-release nitrogen-phosphorus fertilizer containing S, Fe, Mn and Cu and preparation method for fertilizer
  • Organic macromolecular controlled-release nitrogen-phosphorus fertilizer containing S, Fe, Mn and Cu and preparation method for fertilizer

Examples

Experimental program
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Effect test

Embodiment 1

[0050] A method for preparing an organic polymer slow-release nitrogen-phosphorus fertilizer containing trace elements in sulfur, iron, manganese and copper, comprising the following steps:

[0051] (1) Add 50mL of distilled water into the first reactor, then add 1.9mol ferrous sulfate, 1mol manganese sulfate and 0.18mol copper sulfate crystals, adjust the pH to 8-10, let stand, and filter to obtain component A, then Then add 6.6mol of phosphoric acid to obtain component B;

[0052] (2) Add 49.4g thiourea and 35.0mL formaldehyde into the second reactor, react for 200min under the conditions of pH value 8-10 and temperature 30-35°C, then raise the temperature to 50-60°C, Continue to react for 30 minutes, add component B, raise the temperature to 70-80°C, continue to react for 30 minutes, the reaction solution becomes viscous, granulate, and dry to obtain the trace element containing sulfur, iron, manganese and copper Organic polymer slow and controlled release nitrogen and pho...

Embodiment 2

[0055] A method for preparing an organic polymer slow-release nitrogen-phosphorus fertilizer containing trace elements in sulfur, iron, manganese and copper, comprising the following steps:

[0056] (1) Add 50mL of distilled water into the first reactor, then add 1.9mol ferrous sulfate, 1mol manganese sulfate and 0.18mol copper sulfate crystals, adjust the pH to 8-10, let stand, and filter to obtain component A, then Then add 6.6mol of phosphoric acid to obtain component B;

[0057] (2) Add 49.4g thiourea and 39.0mL formaldehyde into the second reactor, react for 200min under the conditions of pH value 8-10 and temperature 30-35°C, then raise the temperature to 50-60°C, Continue to react for 30 minutes, add component B, raise the temperature to 70-80°C, continue to react for 30 minutes, the reaction solution becomes viscous, granulate, and dry to obtain the trace element containing sulfur, iron, manganese and copper Organic polymer slow and controlled release nitrogen and pho...

Embodiment 3

[0061] A preparation method of an organic polymer slow and controlled release nitrogen and phosphate fertilizer containing trace elements in sulfur, iron, manganese and copper, comprising the following steps:

[0062] (1) Add 50mL of distilled water into the first reactor, then add 1.9mol ferrous sulfate, 1mol manganese sulfate and 0.18mol copper sulfate crystals, adjust the pH to 8-10, let stand, and filter to obtain component A, then Then add 6.6mol of phosphoric acid to obtain component B;

[0063] (2) Add 49.4g of thiourea and 30.5mL of formaldehyde into the second reactor, react for 40min under the conditions of pH value 8-10 and temperature 30-35°C, then raise the temperature to 50-60°C, Continue the reaction for 40 minutes, add component B, raise the temperature to 70-80°C, continue the reaction for 30 minutes, the reaction solution becomes viscous, granulate, and dry to obtain the sulfur-iron-manganese-copper-containing trace elements Organic polymer slow and controll...

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Abstract

The invention discloses an organic macromolecular controlled-release nitrogen-phosphorus fertilizer containing S, Fe, Mn and Cu. A preparation method for the fertilizer comprises the following steps: adding ferrous sulfate, manganese sulfate and copper sulfate crystals into distilled water, adjusting the pH value to be 8-10, standing, filtering to prepare a component A, and adding phosphoric acid to prepare a component B; adding thiourea and formaldehyde, reacting for 40-200 minutes under the condition that the pH value is 8-10 and the temperature ranges from 30 DEG C to 35 DEG C, heating to 50-60 DEG C, continuously reacting for 30-90 minutes, adding the component B, adjusting the temperature to be 70-100 DEG C, continuously reacting for 30-40 minutes, and when a reaction solution becomes pasty, performing granulation and drying. The method is simple; dihydric phosphate formed by Fe, Mn, Cu and phosphoric acid in the fertilizer reacts with a urea-formaldehyde condensation polymer, so that various nutritive elements such as N, P, S, Fe, Mn and Cu are connected to one macromolecular chain through chemical bonds.

Description

technical field [0001] The invention relates to a slow and controlled release chemical fertilizer, in particular to an organic macromolecule slow and controlled release nitrogen and phosphate fertilizer containing sulfur, iron, manganese and copper trace elements and a preparation method thereof. Background technique [0002] At present, there are 17 kinds of essential elements that are recognized as indispensable for crop growth. According to the quantity required by plants, they can be roughly divided into macronutrients, secondary and micronutrients. Among them, the importance of macroelements such as nitrogen, phosphorus, and potassium has been well known by people, but their importance is often overlooked because plants have less demand for medium and microelements. Although plants do not have much demand for medium and micronutrients, they are required by plants. In recent years, with the continuous improvement of crop yields and the gradual decline in the proportion ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C08G12/40
CPCC05D9/02C05G3/00C05G3/90C08G12/40
Inventor 刘亚青白甜程冬冬向阳赵贵哲
Owner ZHONGBEI UNIV
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