Organic macromolecular controlled-release nitrogen-phosphorus fertilizer containing Zn and preparation method for fertilizer

The technology of organic macromolecule and trace element is applied in the field of organic macromolecule slow-release nitrogen and phosphorus fertilizer and its preparation, which can solve the problem of high cost of chelated zinc fertilizer, and achieve the effects of simple method, improved utilization rate, and reduced soil fixed amount.

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

The zinc in chelated zinc fertilizer is easily absorbed by crops, which better solves the problems existing in the use of inorganic zinc fertilizer, but the cost of chelated zinc fertilizer is too high

Method used

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  • Organic macromolecular controlled-release nitrogen-phosphorus fertilizer containing Zn and preparation method for fertilizer
  • Organic macromolecular controlled-release nitrogen-phosphorus fertilizer containing Zn and preparation method for fertilizer
  • Organic macromolecular controlled-release nitrogen-phosphorus fertilizer containing Zn and preparation method for fertilizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The preparation method of organic macromolecule slow-release nitrogen and phosphorus fertilizer containing trace element zinc comprises the following steps:

[0042] (1), add 14.0g phosphoric acid (0.14mol) and 4.55g zinc powder (0.07mol) in the first reactor, stir and dissolve, and obtain A component;

[0043] (2), add 39.0g urea and 35.0mL formaldehyde in the second reactor, react for 200min under the condition that the pH value is 8~10 and the temperature is 30~35℃, then the temperature is raised to 50~60℃, Continue the reaction for 30min, add component A, increase the temperature to 70-80°C, continue the reaction for 30min, the reaction solution becomes viscous, granulate, and dry to obtain the organic polymer slow-moving organic polymer containing trace element zinc. Controlled release nitrogen and phosphorus fertilizers.

[0044] The nitrogen content of the obtained organic polymer slow-release nitrogen and phosphorus fertilizer containing trace element zinc was ...

Embodiment 2

[0046]The preparation method of organic macromolecule slow-release nitrogen and phosphorus fertilizer containing trace element zinc comprises the following steps:

[0047] (1), add 14.0g phosphoric acid and 4.55g zinc powder into the first reactor, stir and dissolve, and obtain A component;

[0048] (2), add 39.0g urea and 39.0mL formaldehyde in the second reactor, react for 200min under the condition that pH value is 8~10 and temperature is 30~35℃, then the temperature is raised to 50~60℃, Continue the reaction for 30min, add component A, increase the temperature to 70-80°C, continue the reaction for 30min, the reaction solution becomes viscous, granulate, and dry to obtain the organic polymer slow-moving organic polymer containing trace element zinc. Controlled release nitrogen and phosphorus fertilizers.

[0049] The nitrogen content of the obtained organic polymer slow-release nitrogen and phosphorus fertilizer containing trace element zinc was 29.54 wt%, with P 2 O 5 %...

Embodiment 3

[0052] The preparation method of organic macromolecule slow-release nitrogen and phosphorus fertilizer containing trace element zinc comprises the following steps:

[0053] (1), add 14.0g phosphoric acid and 4.55g zinc powder into the first reactor, stir and dissolve, and obtain A component;

[0054] (2), add 39.0g urea and 30.5mL formaldehyde in the second reactor, react for 40min under the condition that pH value is 8~10 and temperature is 30~35℃, then the temperature is raised to 50~60℃, Continue the reaction for 30min, add component A, increase the temperature to 70-80°C, continue the reaction for 40min, the reaction solution becomes viscous, granulate, and dry to obtain the organic polymer retarder containing trace element zinc. Controlled release nitrogen and phosphorus fertilizers.

[0055] The nitrogen content of the obtained organic polymer slow-release nitrogen and phosphorus fertilizer containing trace element zinc was 23.67 wt%, with P 2 O 5 % phosphorus content...

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Abstract

The invention discloses an organic macromolecular controlled-release nitrogen-phosphorus fertilizer containing Zn and a preparation method for the fertilizer. The preparation method comprises the following steps: stirring and dissolving phosphoric acid and Zn powder according to a molar ratio of 2 to 1 to prepare a component A; reacting urea and formaldehyde at a molar ratio of (1.25-2) to 1 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 A, 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 Zn and phosphoric acid in the fertilizer reacts with a urea-formaldehyde condensation polymer, so that various nutritive elements such as N, P and Zn are connected to one macromolecular chain through chemical bonds, the nutritive elements are endowed with controlled-release performances, the utilization rate of the nutritive elements is increased, and the soil fixation amount of the nutritive elements is reduced.

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 phosphorus fertilizer containing trace element zinc and a preparation method thereof. Background technique [0002] Micronutrient deficiencies, especially zinc deficiency, are a growing concern worldwide. According to the WTO survey, nearly one-third of the world's population is facing health problems caused by zinc deficiency, and zinc deficiency has become one of the main factors affecting human health. In my country, about 50% of children show mild zinc deficiency symptoms, and the situation is more serious in the north, especially in remote areas where grains are the mainstay. Studies have shown that the main causes of zinc deficiency in the human body include the low zinc content in the grains of cereal crops and the presence of various anti-nutritional factors in the grains that limit the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C08G12/40
CPCC05B17/00C08G12/40C05C9/00C05D9/02C05F11/00
Inventor 赵贵哲程冬冬白甜向阳刘亚青
Owner ZHONGBEI UNIV
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