Anti-hard water composite water-soluble fertilizer and preparation method thereof

A technology of water-soluble fertilizer and hard water resistance, applied in fertilization equipment, fertilizer mixture, application, etc., can solve the problems of low fertilizer utilization rate, low nutrient content, low hard water resistance, etc., achieve strong hard water resistance, stable product properties, The effect of high fertilizer use efficiency

Inactive Publication Date: 2012-07-18
HANGZHOU QIUSHI INTPROP CONSULTATION & SERVICE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, most water-soluble fertilizers on the market are mainly solid. Although the nutrient content is high, at least 100 Only 500 times the volume of water can dissolve it, and its resistance to hard water is not high, so it cannot be used in saline-alkaline areas, nor is

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Step (1). Take 100kg of weathered coal with a water content of 30%, and crush it to 40 mesh.

[0020] Step (2). Add quantitative water in reactor, be warming up to 80 o C, add weathered coal after step (1) treatment again, make the weight ratio of weathered coal and water in the reactor be 0.8:5, stir reaction 0.5h;

[0021] Step (3). Put the mixed acid into the reaction kettle one after another until the volume content of the mixed acid accounts for 2% of the volume content of the entire mixed system, stir and react for 0.5h, and filter and remove the slag with a 50-mesh filter screen;

[0022] The mixed acid is composed of 98% concentrated sulfuric acid, 85% phosphoric acid, and 50% nitric acid, and the volume ratio of sulfuric acid: phosphoric acid: nitric acid is 1:5:1; 100 mesh;

[0023] Step (4). After filtering and removing slag, add ammonium nitrate and potassium nitrate to the reaction kettle until the solid-liquid ratio of the weight of ammonium nitrate to ...

Embodiment 2

[0029] Step (1). Take 110 kg of weathered coal with a water content of 35%, and crush it to 50 mesh.

[0030] Step (2). Add quantitative water in reactor, be warming up to 80 o C, add the weathered coal after step (1) treatment again, make the weight ratio of weathered coal and water in the reactor be 1:5, stir and react for 0.75h;

[0031] Step (3). Put the mixed acid into the reaction kettle one after another until the volume content of the mixed acid accounts for 4% of the volume content of the entire mixed system, stir and react for 0.75h, and filter and remove the slag with a filter screen with a pore size of 70 mesh;

[0032] The mixed acid is composed of 98% concentrated sulfuric acid, 85% phosphoric acid, and 50% nitric acid, and the volume ratio of sulfuric acid: phosphoric acid: nitric acid is 1:5:1; 100 mesh;

[0033] Step (4). After filtering and removing slag, add ammonium nitrate and potassium nitrate to the reaction kettle until the solid-to-liquid ratio of t...

Embodiment 3

[0039] Step (1). Take 150kg of weathered coal with a water content of 50%, and crush it to 60 mesh.

[0040] Step (2). Add quantitative water in reactor, be warming up to 80 oC, add the weathered coal after step (1) treatment again, make the weight ratio of weathered coal and water in the reactor be 1.2:5, stir reaction 1h;

[0041] Step (3). Put the mixed acid into the reaction kettle one after another until the volume content of the mixed acid accounts for 5% of the volume content of the entire mixed system, stir and react for 1 hour, and filter and remove the slag with a filter screen with a pore size of 100 mesh;

[0042] The mixed acid is composed of 98% concentrated sulfuric acid, 85% phosphoric acid, and 50% nitric acid, and the volume ratio of sulfuric acid: phosphoric acid: nitric acid is 1:5:1; 100 mesh;

[0043] Step (4). After filtering and removing slag, add ammonium nitrate and potassium nitrate to the reaction kettle until the solid-liquid ratio of the weight...

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PUM

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Abstract

The invention discloses an anti-hard water composite water-soluble fertilizer and a preparation method of the anti-hard water composite water-soluble fertilizer. The existing composite water-soluble fertilizer is low in hard water resistance and cannot be used in saline-alkali areas. The anti-hard water composite water-soluble fertilizer contains the following components: 30-50% of nitrogen, phosphorus and potassium, 0.5-2% of microelements including iron, manganese, copper, zinc, molybdenum and boron, 3-8% of humic acid, and water for the rest. The preparation method of the anti-hard water composite water-soluble fertilizer comprises the following steps: taking weathered coal, sulfuric acid, phosphoric acid, nitric acid, ammonium nitrate, potassium hydroxide and potassium nitrate as main materials; taking potassium pyrophosphate, polyvinylpyrrolidone, polyacrylamide, ammonium polyphosphate, sodium dodecyl sulfate, methylsilane, xanthan gum, carrageenan and konjac gum mixture as an auxiliary anti-hard water slow release agent; taking ferrous sulfate, zinc sulfate, potassium borate, copper sulfate, manganese sulfate and ammonium molybdate as microelement additives; degrading, modifying, chelating, stabilizing and the like to obtain the anti-hard water composite water-soluble fertilizer. The anti-hard water composite water-soluble fertilizer is high in utilization rate, stable in product shape, convenient to use, resistant to hard water and the like, and is suitable for saline-alkali areas with harder water.

Description

technical field [0001] The invention belongs to the technical field of agricultural water-soluble fertilizers, and relates to a hard water-resistant compound water-soluble fertilizer and a preparation method thereof. Background technique [0002] At present, water-soluble fertilizers on the market are mostly solid. Although the nutrient content is high, at least 100 Only 500 times the volume of water can dissolve it, and its resistance to hard water is not high, so it cannot be used in saline-alkaline areas, nor is it suitable for small-scale water-saving irrigation agriculture; although liquid water-soluble fertilizers can be dissolved in water at any ratio, their nutrients The content is low, and the fertilizer utilization rate is low, which does not meet the requirements of modern and economical agricultural development. Contents of the invention [0003] Aiming at the deficiencies of the prior art, the invention provides a hard water-resistant compound water-solu...

Claims

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Application Information

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IPC IPC(8): C05G3/00
Inventor 雷平杨如玉
Owner HANGZHOU QIUSHI INTPROP CONSULTATION & SERVICE
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