Preparation method of super absorbent polymer (nitrogen) aquasorb-fertilizer

A polymer water-absorbing, water-retaining fertilizer technology, applied in fertilization devices, fertilizer mixtures, applications, etc., can solve the problems of destroying soil aggregate structure, soil particle dispersion, and fertility decline, so as to improve aggregate structure, prevent soil compaction, and promote survival Effect

Inactive Publication Date: 2014-07-02
QINGDAO XINYAODI AGRI 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 soil aggregate structure, changing the physical and chemical properties of the soil, resulting in soil compaction and reduced fertility

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The preparation method of the above-mentioned polymer water-absorbing resin includes the following contents

[0026] (1) Prepare 19000g of 31.5% NaOH aqueous solution;

[0027] (2) Neutralization reaction: Continuously drop the prepared NaOH aqueous solution into 23000g of acrylic acid with a purity greater than 99.5% for neutralization reaction. The reaction time is 20 minutes. Add 1800g of acrylamide and 20000g of urea; then cool down to 50- 60°C;

[0028] (3) Graft copolymerization reaction: Add 4100g of crop straw powder (100-200 mesh) to the solution after neutralization reaction at one time, stir and cool down to 50-40°C, the speed is 100-120 rpm, and then add 8g sub- Methylbisacrylamide cross-linking agent, then add 10g of ammonium persulfate initiator, heat to 65-70°C for graft copolymerization reaction, the temperature during the reaction is controlled at 110°C-115°C, and the reaction time is 15 minutes;

[0029] (4) Coagulation and drying: the reaction mixture...

Embodiment 2

[0032] The preparation method of the above-mentioned polymer water-absorbing resin includes the following contents

[0033] (1) Prepare 19000g of 31.5% NaOH aqueous solution;

[0034] (2) Neutralization reaction: Continuously drop the prepared NaOH aqueous solution into 23000g of acrylic acid with a purity greater than 99.5% for neutralization reaction. The reaction time is 20 minutes. Add 1500g of acrylamide and 23000g of urea; then cool down to 50- 60°C;

[0035] (3) Graft copolymerization reaction: Add 4300g of crop straw powder (100-200 mesh) to the solution after neutralization reaction at one time, stir and cool down to 50-40°C, the speed is 100-120 rpm, and then add 8g sub- Methylbisacrylamide cross-linking agent, then add 10g of ammonium persulfate initiator, heat to 65-70°C for graft copolymerization reaction, the temperature during the reaction is controlled at 110°C-115°C, and the reaction time is 15 minutes;

[0036] (4) Coagulation and drying: the reaction mixtu...

Embodiment 3

[0039] The preparation method of the above-mentioned polymer water-absorbing resin includes the following contents

[0040] (1) Prepare 19000g of 31.5% NaOH aqueous solution;

[0041] (2) Neutralization reaction: Continuously drop the prepared NaOH aqueous solution into 23000g of acrylic acid with a purity greater than 99.5% for neutralization reaction. The reaction time is 20 minutes. Add 1600g of acrylamide and 21000g of urea; then cool down to 50- 60°C;

[0042] (3) Graft copolymerization reaction: Add 4500g of crop straw powder (100-200 mesh) to the solution after neutralization reaction at one time, stir and cool down to 50-40°C, the speed is 100-120 rpm, and then add 8g sub- Methylbisacrylamide cross-linking agent, then add 10g of ammonium persulfate initiator, heat to 65-70°C for graft copolymerization reaction, the temperature during the reaction is controlled at 110°C-115°C, and the reaction time is 15 minutes;

[0043] (4) Coagulation and drying: the reaction mixtu...

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Abstract

The invention provides a preparation method of a super absorbent polymer (nitrogen) aquasorb-fertilizer. The preparation method comprises five steps of NaOH aqueous solution preparation, neutralization reaction, graft copolymerization, solidification and drying, and smashing; and is capable of shortening technological process, reducing production time, and reducing production cost. The preparation method is capable of solving a problem that damages on soil are caused by large amount utilization of traditional fertilizers, and increasing nitrogen content of the super absorbent polymer (nitrogen) aquasorb-fertilizer. No three wastes (waste material, waste gas, and waste water) are generated in production processes; no pollution is caused to the environment; the super absorbent polymer (nitrogen) aquasorb-fertilizer is safe and friendly to the environment, and is stable in product quality.

Description

technical field [0001] The invention relates to a (nitrogen) water-retaining fertilizer made of polymer water-absorbing resin, in particular to a production process of polymer water-absorbing resin (SAP). [0002] Background technique [0003] SAP water-retaining fertilizer is a new SAP water-retaining fertilizer material formed by polymerizing agricultural and forestry straw, 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, potassium 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 ra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F289/00C08F220/06C08F220/56C08F222/38C08F2/44C05G3/04C05G3/80
Inventor 朱彦芳
Owner QINGDAO XINYAODI AGRI TECH CO LTD
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