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High-concentration low-temperature-resistant liquid phosphorus-potassium fertilizer and preparation method thereof

A low-temperature-resistant, high-concentration technology, applied in fertilization devices, fertilizer mixtures, applications, etc., can solve the problems that unqualified enterprises cannot purchase and use fertilizers, fertilizers cannot be used on chlorine-resistant crops, and unfavorable product production, etc., to increase the slow-release effect, The effect of improving farmers' labor efficiency and reducing the amount of use

Active Publication Date: 2015-09-09
中化(临沂)作物营养有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent has the following defects: ammonium nitrate is an explosive product, and its purchase and use are restricted. Generally, unqualified enterprises cannot purchase and use it, which is not conducive to product production.
This patent has the following defects: due to the use of potassium chloride, there are more chloride ions in the product, and the water-soluble fertilizer industry standard has a limited standard for chloride ions. The fertilizer of this invention cannot be used on chlorine-avoiding crops, and the scope of application is limited.

Method used

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  • High-concentration low-temperature-resistant liquid phosphorus-potassium fertilizer and preparation method thereof
  • High-concentration low-temperature-resistant liquid phosphorus-potassium fertilizer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Add 400kg of pure water to the enamel reaction kettle, turn on the stirring and condensing circulating water, slowly add 435kg of potassium tripolyphosphate into it, control the temperature in the kettle at 30°C and stir at a constant speed for 2h.

[0025] (2) Then lower the temperature to 5°C, slowly add 510kg of potassium hydroxide, and stir for 2 hours until fully dissolved.

[0026] (3) Keep the temperature at 10°C, add 350kg of citric acid to adjust the pH value of the solution, control the temperature in the kettle at 30°C, and stir for 1 hour.

[0027] (4) Add sodium octaborate tetrahydrate and stir until dissolved, which takes 30 minutes.

[0028] (5) Add EDTA-Zn and stir until dissolved, which takes 30 minutes, and cool to room temperature to obtain liquid phosphorus and potassium fertilizer.

[0029] (6) Antifreeze synergist configuration: open the small stirrer of the reaction kettle, add 2kg of triethanolamine and stir, add 2kg of phytic acid and stir ...

Embodiment 2

[0032] (1) Add 450kg of pure water to the enamel reaction kettle, turn on the stirring and condensing circulating water, slowly add 400kg of potassium tripolyphosphate to it, control the temperature in the kettle at 50°C and stir at a constant speed for 2 hours.

[0033] (2) The temperature in the kettle was controlled at 50°C, and 332g of potassium formate was added slowly, and stirred for 30min until the solution was clear and uniform.

[0034] (3) Then lower the temperature to 10°C, slowly add 400kg of potassium pyrophosphate, and stir at a constant speed for 1 hour until fully dissolved.

[0035] (4) Keep the temperature at 20° C., add 80 kg of phosphoric acid (85%) to adjust the pH value of the solution, control the temperature in the kettle at 50° C., and stir at an even speed for 1 hour.

[0036] (5) Add sodium octaborate tetrahydrate and stir until dissolved, which takes 30 minutes.

[0037] (6) Add EDTA-Zn and stir until dissolved, it takes 30min, then cool to room tem...

Embodiment 3

[0041] (1) Add 500kg of pure water to the enamel reaction kettle, turn on the stirring and condensing circulating water, slowly add 400kg of potassium tripolyphosphate to it, control the temperature in the kettle at 45°C and stir at a constant speed for 2 hours.

[0042] (2) The temperature in the kettle was controlled at 45°C, and 220kg of potassium hydroxide (mass fraction 85%) and 150kg of potassium formate were slowly added, and stirred for 35min until the solution was clear and homogeneous.

[0043] (3) Then lower the temperature to 8°C, slowly add 150kg of potassium pyrophosphate, and stir at a uniform speed for 1 hour until fully dissolved.

[0044] (4) Keep the temperature at 15°C, add 200kg of phosphoric acid (mass fraction 85%) and 40kg of citric acid to adjust the pH value of the solution, control the temperature in the kettle at 35°C, and stir at a constant speed for 1h.

[0045] Add 20 kg of sodium octaborate tetrahydrate and stir until dissolved, which takes 30 m...

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Abstract

The invention discloses high-concentration low-temperature-resistant liquid phosphorus-potassium fertilizer which comprises the following materials in parts by weight: 20-26 parts of potassium tripolyphosphate, 0-29.4 parts of potassium hydroxide, 0-23.5 parts of potassium pyrophosphate, 0-19.5 parts of potassium formate, 0-20 parts of citric acid, 0-4.7 parts of phosphoric acid, 1.0-1.5 parts of EDTA-Zn, 0.3-0.8 part of disodium octoborate tetrahydrate, 0.1-0.5 part of triethanolamine, 0.1-0.5 part of phytic acid, 0.1-0.4 part of dimethyl sulfoxide and 23-26.5 parts of purified water. The dosages of citric acid and phosphoric acid cannot be zero simultaneously, and the dosages of potassium hydroxide, potassium pyrophosphate and potassium formate cannot be zero simultaneously. The product has high stability. Owing to a specially prepared anti-freezing agent, the product can keep stable at minus 30 DEG C, is free of a crystal separation phenomenon, and obviously has higher stability than like products on sale.

Description

technical field [0001] The invention belongs to the field of water-soluble fertilizer production, and relates to a large-element liquid water-soluble fertilizer, in particular to a high-concentration low-temperature resistant liquid phosphorus and potassium fertilizer and a preparation method thereof. Background technique [0002] Water-soluble fertilizer (Water Soluble Fertilizer, WSF), referred to as water-soluble fertilizer, is a multi-component compound fertilizer that can be completely dissolved in water. It has good water solubility and no residue, and can be quickly dissolved in water. Compared with traditional superphosphate, granulated compound fertilizer and other varieties, water-soluble fertilizer has obvious advantages, it is easier to be absorbed by crops, and its absorption and utilization rate is relatively high. More importantly, it can be applied to sprinkler irrigation, drip irrigation, etc. , realize the simultaneous application of water and fertilizer, u...

Claims

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Application Information

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IPC IPC(8): C05G3/00
Inventor 王岩梁志杰张弘王绪涛孙忠鹏
Owner 中化(临沂)作物营养有限公司
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