Multi-element water-soluble fertilizer

A water-soluble fertilizer, multi-element technology, applied in the direction of urea compound fertilizer, nitrogen fertilizer, potash fertilizer, etc., can solve the problem of reducing the fertilizer efficiency and activity of medium and trace elements, and achieve the effect of promoting absorption

Inactive Publication Date: 2015-06-10
路永宽
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a multi-element water-soluble fertilizer in order to solve the technical problem that insoluble phosphate is easily ge

Method used

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  • Multi-element water-soluble fertilizer
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  • Multi-element water-soluble fertilizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1 A multi-element water-soluble fertilizer, including the following steps: (1), adding 80% phosphoric acid solution and urea to the reactor for complexation reaction, the molar ratio of phosphoric acid and urea is 1:1, and the temperature is controlled at 80 Stir and react at ℃ for 20 minutes to obtain a urea phosphate solution, which is filtered through a plate frame;

[0026] (2) Calcium nitrate and magnesium nitrate are added to the filtered urea phosphate solution in proportion, and the amount added is as follows: P: Ca: Mg molar ratio = 1.2: 1.5: 0.6, and the reaction is stirred to obtain soluble urea superphosphate and urea Phosphate complex M(HPO)(H 2 PO)-, M(H 2 PO)OH 、CO(NH 2 ) 2 · MHPO, CO(NH 2 ) 2 · MH 4 (PO 4 ) 2 , wherein M represents Ca or Mg, and is dissolved in water until the solution is transparent;

[0027] (3) Add potassium nitrate and ammonium nitrate to the above solution in proportion until completely dissolved;

[0028] (4) Add...

Embodiment 2

[0030] Example 2 A multi-element water-soluble fertilizer, including the following steps: (1), adding phosphoric acid solution with a concentration of 70% and urea into the reactor for complexation reaction, the molar ratio of phosphoric acid and urea is 1:1.1, and the temperature is controlled at 90 Stir and react at ℃ for 20 minutes to obtain a urea phosphate solution, which is filtered through a plate frame;

[0031] (2) Calcium nitrate and magnesium nitrate are added in proportion to the filtered urea phosphate solution, and the amount added is as follows: P:Ca;Mg molar ratio=1.3:1.5:0.6, and the stirring reaction is to obtain soluble urea superphosphate and urea Phosphate complex M(HPO)(H 2 PO)-, M(H 2 PO)OH 、CO(NH 2 ) 2 · MHPO, CO(NH 2 ) 2 · MH 4 (PO 4 ) 2 , wherein M represents Ca or Mg, and is dissolved in water until the solution is transparent;

[0032] (3) Add potassium nitrate and ammonium nitrate to the above solution in proportion until completely disso...

Embodiment 3

[0035] Example 3 A multi-element water-soluble fertilizer, including the following steps: (1), adding phosphoric acid solution with a concentration of 75% and urea into the reactor for complexation reaction, the molar ratio of phosphoric acid and urea is 1:1.2, and the temperature is controlled at 75 Stir and react at ℃ for 20 minutes to obtain a urea phosphate solution, which is filtered through a plate frame;

[0036] (2) Calcium nitrate and magnesium nitrate are added in proportion to the filtered urea phosphate solution, and the addition amount is as follows: P:Ca:Mg molar ratio=1.5:1.5:0.6, stirring and reacting to obtain soluble urea superphosphate and urea Phosphate complex M(HPO)(H 2 PO)-, M(H 2 PO)OH 、CO(NH 2 ) 2 · MHPO, CO(NH 2 ) 2 · MH 4 (PO 4 ) 2 , wherein M represents Ca or Mg, and is dissolved in water until the solution is transparent;

[0037] (3) Add potassium nitrate and ammonium nitrate to the above solution in proportion until completely dissolved; ...

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Abstract

The invention relates to a chemical fertilizer and specifically relates to a multi-element water-soluble fertilizer. The multi-element water-soluble fertilizer is used for solving the technical problem of degradation of the fertilizer efficiency activity of mediumtrace elements due to that the existing common phosphorus fertilizers are prone to generate insoluble phosphates in soil. The key point of the multi-element water-soluble fertilizer is to introduce organic phosphorus; the phosphorus fertilizer is chelated with calcium and magnesium in a certain ratio to generate soluble urea-modified superphosphates or urea-modified phosphates, and due to the addition of urea phosphate, the solubility of microelements such as copper, zinc, manganese and boron in aqueous solutions can be improved; especially, macroelements such as nitrogen and potassium are further added to the multi-element water-soluble fertilizer, and therefore, the multi-element water-soluble fertilizer is a unique comprehensively balanced nutritional fertilizer with coexisting major, medium and trace elements and free from precipitation in the market at present. The multi-element water-soluble fertilizer is an acidic fertilizer, and is capable of effectively controlling the pH value of soil and regulating the acid-base equilibrium of the soil; besides, the volatilization of ammonia in the soil is reduced and the utilization rate of the nitrogen fertilizer is increased; meanwhile, the medium trace elements can be activated to form complexes so that the fertilizer efficacy of the medium trace element fertilizers can be enhanced.

Description

technical field [0001] The invention relates to a chemical fertilizer, in particular to a multi-element water-soluble fertilizer. Background technique [0002] At present, when ordinary phosphate fertilizers on the market enter the soil, they will form insoluble phosphates with calcium, magnesium, zinc, manganese, etc. in the soil, resulting in a decrease in the fertilizer efficiency of medium and trace elements. Therefore, there is a great need for a phosphorus-containing fertilizer that does not produce precipitation after entering the soil and can ensure the coexistence of large, medium and trace elements, so as to improve fertilizer efficiency and promote the growth of crops. Contents of the invention [0003] The present invention provides a multi-element water-soluble fertilizer to solve the technical problem that insoluble phosphate is easily generated when ordinary phosphate fertilizer enters the soil, which leads to the reduction of fertilizer efficiency and a...

Claims

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Application Information

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IPC IPC(8): C05G3/04C05G3/80
CPCC05B17/00C05G3/80C05C1/00C05C5/00C05C5/04C05C9/00C05D1/00C05D3/02C05D5/00C05D9/02
Inventor 路永宽
Owner 路永宽
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