A kind of preparation method of polymer water-absorbing resin ammonium phosphate water-retaining fertilizer

A polymer water absorption and ammonium phosphate technology, applied in fertilization equipment, fertilizer mixture, application, etc., can solve the problems of destroying soil aggregate structure, soil particle dispersion, soil compaction, etc., to improve aggregate structure, prevent soil compaction, and reduce production cost effect

Active Publication Date: 2016-01-13
QINGDAO ZETIAN AGRI SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ammonium ions can replace the calcium ions on the soil colloidal particles, causing the soil particles to disperse, thus destroying the

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The preparation method of the above-mentioned polymer water-absorbent resin includes the following contents (1) preparing NaOH aqueous solution: 800 g of NaOH solution with a concentration of 30%;

[0027] (2) Neutralization reaction: The prepared NaOH aqueous solution is continuously added to 1500 g of acrylic acid with a purity greater than 99.5% for neutralization reaction, and the reaction time is 20 minutes; then the temperature is lowered to 60-70°C;

[0028] (3) Graft copolymerization reaction: In the solution after the neutralization reaction, add 1260g phosphoric acid and 550g urea at one time to stir, and the rotating speed is 100-110 rpm, then add 8g ethylene glycol crosslinking agent, and then add 5g persulfuric acid Potassium initiator for graft copolymerization reaction, the temperature during the reaction is controlled at 100°C-115°C, and the reaction time is 15-20 minutes;

[0029] (4) coagulation and drying: the reaction mixture is diverted into the polym...

Embodiment 2

[0033] The preparation method of the above-mentioned polymer water-absorbing resin includes the following contents

[0034] (1) prepare NaOH aqueous solution: concentration is 30% NaOH solution 800g;

[0035] (2) Neutralization reaction: The prepared NaOH aqueous solution is continuously added to 1500 g of acrylic acid with a purity greater than 99.5% for neutralization reaction, and the reaction time is 20 minutes; then the temperature is lowered to 70-80°C;

[0036] (3) Graft copolymerization reaction: In the solution after the neutralization reaction, add 1270g phosphoric acid and 530g urea at one time to stir, and the rotating speed is 110-120 rpm, then add 6g ethylene glycol crosslinking agent, and then add 4g persulfuric acid Potassium initiator for graft copolymerization reaction, the temperature during the reaction is controlled at 100°C-115°C, and the reaction time is 15-20 minutes;

[0037] (4) coagulation and drying: the reaction mixture is diverted into the polyme...

Embodiment 3

[0041] The preparation method of the above-mentioned polymer water-absorbing resin includes the following contents

[0042] (1) prepare NaOH aqueous solution: concentration is 30% NaOH solution 800g;

[0043] (2) Neutralization reaction: The prepared NaOH aqueous solution is continuously added to 1500 g of acrylic acid with a purity greater than 99.5% for neutralization reaction, and the reaction time is 20 minutes; then the temperature is lowered to 60-70°C;

[0044] (3) Graft copolymerization reaction: In the solution after the neutralization reaction, add 1230g phosphoric acid and 570g urea at one time to stir, and the rotating speed is 110-120 rpm, then add 8g ethylene glycol cross-linking agent, and then add 4g persulfuric acid Potassium initiator for graft copolymerization reaction, the temperature during the reaction is controlled at 100°C-115°C, and the reaction time is 15-20 minutes;

[0045] (4) coagulation and drying: the reaction mixture is diverted into the polym...

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Abstract

The invention provides a preparation method of a high-molecular water-absorbent resin(ammonium phosphate )water retention fertilizer, which comprises five steps: preparing a NaOH aqueous solution, performing a neutral reaction, performing a graft copolymerization reaction, solidifying and drying, and crushing. The technology flow is shortened, production time is reduced, production cost is reduced, so that the technical problems of long production period and high cost can be solved, and simultaneously, the trace element content of nitrogen and phosphor in the water retention fertilizer can be increased. During the production process, no three wastes (waste material, waste gas and waste water) is generated, and the water retention fertilizer has the advantages of no pollution to environment, safety and environmental protection, and stable product quality.

Description

technical field [0001] The invention relates to an ammonium phosphate water-retaining fertilizer made of a polymer water-absorbing resin, in particular to a production process of a polymer water-absorbing resin (SAP). Background technique [0002] SAP water-retaining fertilizer is a new SAP water-retaining fertilizer material formed by polymerizing chemical fertilizers and organic monomers (acrylic acid, acrylamide) as raw materials. SAP water-retaining fertilizer is mainly used for the cultivation and production of agricultural and forestry crops. The water-retaining fertilizer itself contains a large amount of nitrogen, phosphorus and other trace elements. At the same time, it has the functions of water absorption, water retention, fertilizer retention, heat preservation, drought resistance, desertification resistance, and activation of vegetation growth. It can absorb water 100-700 times its own weight, quickly absorb and store rainwater and irrigation water and fertiliz...

Claims

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Application Information

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IPC IPC(8): C08F120/06C08F2/44C05G3/00
Inventor 朱彦芳
Owner QINGDAO ZETIAN AGRI SCI & TECH CO LTD
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