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Macro-element solid water-soluble fertilizer and preparation method thereof

A technology with a large amount of elements and solid water, applied in the directions of urea compound fertilizer, nitrogen fertilizer, magnesium fertilizer, etc., can solve the problems of poor dispersion effect of powdered fertilizer, inconvenient storage and transportation, and inconspicuous effect, etc., and achieves low cost and reduced surface area. Tension, the effect of promoting dissolution

Inactive Publication Date: 2018-03-23
GUIYANG KAILIN FERTILIZER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This wetting agent is mainly used for fertilization and foliar fertilizer. It is liquid, which is inconvenient for storage and transportation. The main raw material is surfactant. The effect of water-soluble fertilizer is not obvious
[0008] According to the above, the current fertilizer dispersants in my country are mainly inorganic minerals and surfactants, and they are mainly used for foliar fertilizers and flushing fertilization. There are fewer dispersants for water-soluble fertilizers, and the methods of use are simple addition and mixing. Type, the dispersing effect of large particle fertilizer is obvious, but the dispersing effect of powdery fertilizer is poor
The powdered fertilizer dissolves quickly in water, but it is easy to form aggregates when it contacts with water, and it needs vigorous stirring to dissolve

Method used

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  • Macro-element solid water-soluble fertilizer and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0033] The components and ratios of macroelement solid water-soluble fertilizers are as follows, all in percentages by weight:

[0034] Urea 34%, potassium nitrate 13%, ammonium polyphosphate 16%, dipotassium hydrogen phosphate 18%, boric acid 2%, magnesium sulfate 2%, zinc sulfate 1.5%. Copper sulfate 0.5%, manganese sulfate 1%, amino acid powder 6%, high-efficiency dispersant 4%, cosolvent 2%, wherein high-efficiency dispersant is polystyrene-maleic anhydride grafted methoxy polyethylene glycol copolymer ( The molecular weight is about 20000), and the cosolvent is sodium lignosulfonate.

[0035] Described polystyrene-maleic anhydride grafted methoxy polyethylene glycol copolymer dispersant, its preparation method comprises the following steps:

[0036] (1) Put 40-60 parts of polystyrene into the reaction kettle, add dibenzoyl peroxide, and then add 30-48% of maleic anhydride by weight of polystyrene, at a temperature of 50°C-65°C React for 1 to 2 hours to obtain a polymer;...

Embodiment 2

[0041] As described in embodiment case 1, its difference is that each raw material component is as follows, is weight percent:

[0042] Urea 30%, potassium nitrate 15%, ammonium polyphosphate 12%, dipotassium hydrogen phosphate 18%, boric acid 3%, magnesium sulfate 2%, zinc sulfate 1.5%. Copper sulfate 0.5%, manganese sulfate 1%, amino acid powder 5%, high-efficiency dispersant 5%, co-solvent 2%, high-efficiency dispersant is wherein high-efficiency dispersant is polystyrene-maleic anhydride grafted methoxypolyethylene Alcohol copolymer (molecular weight is about 18000), co-solvent is 2-naphthalenesulfonic acid formaldehyde polymer sodium phosphate.

Embodiment 3

[0044] As described in embodiment case 1, its difference is that each raw material component is as follows, is weight percent:

[0045] Urea 35%, potassium nitrate 12%, ammonium polyphosphate 14%, dipotassium hydrogen phosphate 14%, boric acid 4%, magnesium sulfate 2%, zinc sulfate 1.5%. Copper sulfate 0.5%, manganese sulfate 1%, amino acid powder 8%, high-efficiency dispersant 6%, co-solvent 2%, high-efficiency dispersant is polystyrene-maleic anhydride grafted methoxy polyethylene glycol Alcohol copolymer (molecular weight is about 16000), co-solvent is tristyrylphenol polyoxyethylene ether phosphate.

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Abstract

The invention discloses a macro-element solid water-soluble fertilizer and a preparation method thereof. The macro-element solid water-soluble fertilizer is prepared from, in weight percent, 25%-35% of urea, 10%-15% of potassium nitrate, 10%-18% of ammonium polyphosphate, 10%-20% of dipotassium phosphate, 2%-4% of boric acid, 1%-3% of magnesium sulfate, 1%-3% of zinc sulfate, 0.5%-2% of copper sulfate, 0.5%-2% of manganese sulfate, 5%-10% of amino acid powder, 4%-8% of dispersants and 1%-3% of cosolvents. Polystyrene-maleic anhydride grafted methoxy polyethylene glycol copolymer is used as thedispersants used with lignosulfonate, alkyl naphthalene sulfonated formaldehyde condensates and the polystyrene phenol phosphate cosolvents, inter-particle steric hindrance is enlarged, fertilizer particles are easily directionally arranged in water and gain good dispersibility and wettability in the water, and caking of the fertilizer during storage can be effectively prevented. The macro-element solid water-soluble fertilizer is simple to produce, low in cost, environmentally friendly, free of pollution and applicable to large-scale production and has market application values.

Description

technical field [0001] The invention relates to the technical field of fertilizers, in particular to a large-element solid water-soluble fertilizer and a preparation method thereof. Background technique [0002] Water-soluble fertilizer is a multi-component compound fertilizer that can be dissolved in water. It can be quickly dissolved in water and is more easily absorbed by crops. It also has a relatively high absorption and utilization rate, realizes the integration of water and fertilizer, and saves water, fertilizer and labor. It is a new type of fertilizer that has emerged in recent years. my country's water resources are in short supply, and the share used for agricultural production is also declining, which has become a very serious problem. With the continuous and rapid development of China's economy, it is affected by factors such as the gradual improvement of people's living standards and rapid population growth, and The demand for the output and quality of food an...

Claims

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Application Information

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IPC IPC(8): C05G3/00
CPCC05B7/00C05G3/00C05G3/44C05C5/02C05C9/00C05C11/00C05D5/00C05D9/02
Inventor 项双龙吴有丽何润林徐立钦唐丽君韩朝英何花王采艳
Owner GUIYANG KAILIN FERTILIZER CO LTD
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