High-concentration liquid slow-release nitrogen fertilizer and preparation method thereof

A high-concentration, slow-release technology, applied to liquid fertilizers, nitrogen fertilizers, potash fertilizers, etc., can solve the problems of slow release, affecting storage stability, excessive water analysis, etc., to reduce nitrogen loss and volatilization, protect the surrounding environment, and nutrient The effect of high absorption rate

Inactive Publication Date: 2021-01-05
HUBEI FORBON TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is a problem in this technical scheme There is a small amount of polymerized urea formaldehyde in the reaction product that affects storage stability
Patent US 2955390 describes the production of urea-form plant nutrition mixture from urea and UF-85 in the presence of potassium hydroxide alkalinity at a temperature of 90°C. The problem with this technical solution is that the prepared plant nutrition mixture product is usually The disadvantage of being basically unstable in a relatively short period of time, after a while there will be too much water separation, resulting in the instability of the entire solution system
Patent US3462256 describes the preparation of an aqueous solution of 80-90% partially reacted urea and formaldeh

Method used

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  • High-concentration liquid slow-release nitrogen fertilizer and preparation method thereof
  • High-concentration liquid slow-release nitrogen fertilizer and preparation method thereof
  • High-concentration liquid slow-release nitrogen fertilizer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0035]Example 1:

[0036]The liquid slow-release nitrogen fertilizer consists of 65 parts of urea, 43 parts of 35% formaldehyde aqueous solution, 3 parts of potassium hydroxide, 3 parts of monoammonium sulfate, 10 parts of 28% ammonia water, 0.82001 parts of medium and trace element substances and It is composed of 2 parts of biostimulant, among which the trace element substance is composed of 0.1 part of EDTA iron, 0.01 part of EDTA copper, 0.1 part of EDTA zinc, 0.01 part of EDTA manganese, 0.1 part of boric acid, 0.00001 part of sodium molybdate and 0.5 part of calcium formate, The biostimulant consists of 0.5 parts of leucine, 0.5 parts of lysine, 0.5 parts of methionine and 0.5 parts of arginine. The preparation method is as follows:

[0037](1) Mix 43 parts of 35% formaldehyde aqueous solution and 65 parts of urea at room temperature in the reaction kettle with stirring time, control the stirring time for 20 minutes, and control the stirring rate for 500r / min;

[0038](2) To the mixed ...

Example Embodiment

[0050]Example 2:

[0051]Liquid slow-release nitrogen fertilizer consists of 70 parts of urea, 43 parts of 55% formaldehyde solution by mass, 3 parts of potassium hydroxide, 3 parts of triethanolamine, 10 parts of 20% ammonia water, 0.82001 parts of medium and trace element substances and 2 parts. It is composed of biological stimulant, which contains medium and trace elements of 0.1 part of EDTA iron, 0.01 part of EDTA copper, 0.1 part of EDTA zinc, 0.01 part of EDTA manganese, 0.1 part of boric acid, 0.00001 part of sodium molybdate and 0.5 part of calcium formate. Stimulant is composed of 0.5 parts leucine, 0.5 parts lysine, 0.5 parts methionine and 0.5 parts arginine; the preparation method is as follows:

[0052](1) Mix 43 parts of 55% formaldehyde aqueous solution and 70 parts of urea in a reaction kettle at room temperature. The stirring time is controlled for 20 minutes, and the stirring rate is controlled for 1000r / min;

[0053](2) To the mixed solution of step (1), add 10 parts of ...

Example Embodiment

[0065]Example 3:

[0066]The liquid slow-release nitrogen fertilizer consists of 75 parts of urea, 43 parts of 45% formaldehyde aqueous solution, 3 parts of potassium hydroxide, 3 parts of triethanolamine, 10 parts of 25% ammonia water, 0.82001 parts of medium and trace element substances and 2 parts. It is composed of biological stimulant, which contains medium and trace elements of 0.1 part of EDTA iron, 0.01 part of EDTA copper, 0.1 part of EDTA zinc, 0.01 part of EDTA manganese, 0.1 part of boric acid, 0.00001 part of sodium molybdate and 0.5 part of calcium formate. Stimulant is composed of 0.5 parts leucine, 0.5 parts lysine, 0.5 parts methionine and 0.5 parts arginine; the preparation method is as follows:

[0067](1) Mix 43 parts of 45% formaldehyde aqueous solution and 75 parts of urea in a reaction kettle at room temperature. The stirring time is controlled for 15min, and the stirring rate is controlled for 800r / min;

[0068](2) To the mixed solution of step (1), add 10 parts of 25...

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Abstract

The invention discloses a high-concentration liquid slow-release nitrogen fertilizer and a preparation method thereof. The liquid slow-release nitrogen fertilizer is composed of 40-80 parts of urea, 18-50 parts of formaldehyde, 1-15 parts of an alkali compound, 1-15 parts of an amine compound, 1-15 parts of ammonia water, 0.001-1 part of a medium trace element-containing substance and 0.01-5 partof a biostimulant. The preparation method comprises the following steps: sequentially adding the components into a reaction kettle, and carrying out a series of reactions to obtain the high-concentration liquid slow-release nitrogen fertilizer. The liquid slow-release nitrogen fertilizer contains medium trace element substances and biostimulant, and can promote root growth and chlorophyll synthesis and improve crop quality; the fertilizer is directly sprayed on plant leaf surfaces and has the characteristics of quick effect, medium effect and slow effect so that the effective utilization rateof the nitrogen fertilizer is improved to 50 percent; the fertilizer can be randomly mixed with water and pesticides and is directly sprayed to crops so that the problem of non-uniform spreading of the traditional solid fertilizer is solved, and nitrogen loss and volatilization are greatly reduced. The defect of insufficient nitrogen source supply in the early stage of urea-formaldehyde resin is overcome, and the problems of high consumption, short lasting time, high loss rate, environmental pollution and the like of traditional urea are solved.

Description

technical field [0001] The invention relates to a high-concentration liquid slow-release nitrogen fertilizer and a preparation method thereof, in particular to a preparation method of a high-nitrogen content liquid slow-release nitrogen fertilizer. It belongs to the technical field of fertilizers. Background technique [0002] Fertilizer is an important factor affecting agricultural production, agricultural quality and agricultural health. It is the "grain" of various crops and food. my country uses 7% of the world's arable land to feed about 20% of the world's population. The role of fertilizer is indispensable. [0003] Nitrogen fertilizer, the first of the three elements of crop fertilization (nitrogen, phosphorus, and potassium), is one of the most important agricultural production inputs. It plays a very important role in increasing crop yield, soil fertility, and improving the quality of agricultural products. From the global average level, nitrogen fertilizer account...

Claims

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Application Information

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IPC IPC(8): C05G3/00C05G3/40C05G3/90C05G5/20
CPCC05C3/00C05G3/00C05G3/40C05G3/90C05G5/20C05C9/00C05D1/00C05D9/02C05F11/00Y02P60/21
Inventor 王仁宗汪志操素芬陈日远
Owner HUBEI FORBON TECH
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