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Preparation method of water-soluble agricultural soil loosening agent

A soil ripper, water-soluble technology, applied in the field of preparation of water-soluble agricultural ripper, can solve the problem of no agricultural ripper polyacrylamide preparation method, etc., and achieves improved soil seed suitability, product uniformity, and good application Foreground effect

Active Publication Date: 2016-10-12
KINGENTA ECOLOGICAL ENG GRP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After searching, there is no preparation method dedicated to agricultural loosening agent polyacrylamide at present

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A preparation method of water-soluble agricultural loosening agent, the steps are as follows:

[0034] (1) Add 920kg of distilled water, 60kg of acrylamide, and 20kg of acrylic acid into the reaction kettle, control the rotation speed at 120r / min, stir until the monomers are completely dissolved, and obtain monomer mixture A;

[0035] (2) Weigh 0.2 kg of EDTA-2Na and 5 kg of urea, and completely dissolve them in 20.8 kg of distilled water to obtain a mixing solution B.

[0036] (3) Adding the mixing solution B in the step (2) to the reaction kettle of the monomer mixture A in the step (1), adding concentration is then 1kg of ammoniacal liquor and 30kg of sodium carbonate of 10-20%, wherein the sodium carbonate will be divided Batch and intermittent feeding, the reaction temperature of the solution is ≤30°C, and the reaction time is 10-30min to obtain the mixture C;

[0037] (4) Add 0.2kg phosphoric acid, 0.01kg N-N methylenebisacrylic acid amine, 0.8kg ammonium persulf...

Embodiment 2

[0039] A preparation method of water-soluble agricultural loosening agent, the steps are as follows:

[0040] (1) Add 940kg of distilled water, 40kg of acrylamide, and 20kg of acrylic acid into the reactor, control the rotation speed at 120r / min, stir until the monomers are completely dissolved, and obtain monomer mixture A;

[0041] (2) Weigh 0.2 kg of EDTA-2Na and 5 kg of urea, and completely dissolve them in 20.8 kg of distilled water to obtain a mixing solution B.

[0042] (3) Add the mixing solution B in the step (2) to the reactor of the monomer mixture A in the step (1), and then add 1 kg of ammonia and 30 kg of sodium bicarbonate with a concentration of 10-20%, wherein the sodium bicarbonate Feed in batches and intermittently, the reaction temperature of the solution is ≤30°C, the reaction time is 10-30min, and the mixture C is obtained;

[0043] (4) Add 0.15kg phosphoric acid, 0.016kg N-N methylene bisacrylic acid amine, 0.6kg potassium persulfate, 0.6kg sodium bisul...

Embodiment 3

[0045] A preparation method of water-soluble agricultural loosening agent, the steps are as follows:

[0046] (1) Add 900kg of distilled water, 80kg of acrylamide, and 20kg of acrylic acid into the reaction kettle, control the rotation speed at 120r / min, stir until the monomers are completely dissolved, and obtain monomer mixture A;

[0047] (2) Weigh 0.2 kg of EDTA-2Na and 5 kg of urea, and completely dissolve them in 20.8 kg of distilled water to obtain a mixing solution B.

[0048](3) adding the mixing solution B in the step (2) to the reaction kettle of the monomer mixture A in the step (1), then adding concentration is 0.5kg of ammoniacal liquor and 30kg of salt of wormwood of 10-20%, wherein, salt of wormwood needs Feed in batches and intermittently, the reaction temperature of the solution is ≤30°C, and the reaction time is 10-30min to obtain the mixture C;

[0049] (4) Add 0.3kg chitosan, 0.01kg N-N methylene bisacrylic acid amine, 1kg ammonium persulfate, 1kg sodium ...

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Abstract

The invention relates to a preparation method of a water-soluble agricultural soil loosening agent. The method includes the following steps: respectively preparing a monomer mixture A and a mixture solution B; adding the mixture solution B to a reaction kettle equipped with the monomer mixture A, adding ammonia water and a hydrolysis agent, carrying out a neutralization reaction at a controlled temperature of 30DEG C or less to obtain a mixture C; and adding a cross-linking agent and an initiator, and heating above materials to carry out a reaction in order to obtain the soil loosening agent product. Polyacrylamide in the soil loosening agent obtained in the invention has a small molecular weight of 2,000,000-5,000,000, and has large hydrolysis resistance and strong flocculating ability; compared with traditional methods, the preparation method has the advantages of simplicity, easiness in operation, low reaction temperature and mild reaction process; and the product has the advantages of uniformity, no need of drying, great reduction of the production cost, and very good application prospect in liquid water-soluble fertilizers and compound fertilizers.

Description

technical field [0001] The invention relates to a preparation method of a water-soluble agricultural soil loosening agent, which belongs to the field of polymer material synthesis and the field of agricultural preparation production. Background technique [0002] Fertilizers are widely used in agricultural production, but only a small part of nutrients can be absorbed by plants. This is mainly due to the extensive use of single fertilizers and the destruction of soil aggregate structure caused by excessive or too small soil acidity and alkalinity, resulting in Soil compaction is not conducive to the absorption of nutrients by plants. [0003] Polyacrylamide is a water-soluble linear polymer polymerized by free radicals from acrylamide (AM) monomers. It is insoluble in most organic solvents and has good flocculation properties, which can reduce the frictional resistance between liquids. In the field of agriculture, polyacrylamide is often used as an additive in the preparati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/56C08F220/06C05G3/04C05G3/80
CPCC05G3/80C08F220/56C08F220/06
Inventor 曹奇领胡兆平李新柱宋涛滕美丽
Owner KINGENTA ECOLOGICAL ENG GRP
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