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A kind of preparation method of straw-based resin fertilizer

A technology based on resin and straw is applied in the field of preparation of straw-based resin fertilizer, which can solve the problems of inability to prepare superabsorbent resin fertilizer, and achieve the effects of overcoming the low utilization rate of direct returning to the field, long fertilizer efficiency and soil improvement.

Inactive Publication Date: 2017-02-08
徐州禾动力肥料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a method for preparing straw-based resin fertilizers, so as to solve the problem that it is impossible to use crop straws to prepare superabsorbent resin fertilizers at room temperature

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The preparation method of straw-based resin fertilizer comprises the following steps:

[0026] Step 1, straw pretreatment: the wheat straw is washed, dried, shortened, crushed, passed through a 100-mesh standard sieve, and straw powder with a particle size below 100 mesh is collected.

[0027] Step 2, configuration of the monomer phase: add acrylamide, polyethylene glycol diacrylate (average weight-average molecular weight 800), urea, K 2 S 2 o 8 , add 0.5 g of straw powder obtained in step 1, and add distilled water to 40 mL under cold water bath and stirring conditions to obtain a monomer phase; wherein, straw: acrylic acid solution: acrylamide: polyethylene glycol diacrylate: urea: ( K 2 S 2 o 8 :Na 2 SO 3 ) are respectively 1:15:0.5:0.005:0.5:0.04, unit g.

[0028] Step 3, add 108mL cyclohexane and 0.089g Span-60 into the reactor, and slowly add the monomer phase prepared in step 2 under the conditions of 25°C normal temperature, uniform stirring and nitroge...

Embodiment 2

[0034] The preparation method of straw-based resin fertilizer comprises the following steps:

[0035] Step 1, straw pretreatment: wash, dry, shorten and pulverize rice straw, pass through a 100-mesh standard sieve, and collect straw powder with a particle size below 100 mesh.

[0036] Step 2, configuration of the monomer phase: add acrylamide, polyethylene glycol diacrylate (average weight-average molecular weight 900), urea, K 2 S 2 o 8 , add 0.5 g of straw powder obtained in step 1, and add distilled water to 40 mL under cold water bath and stirring conditions to obtain a monomer phase; wherein, straw: acrylic acid solution: acrylamide: polyethylene glycol diacrylate: urea: ( K 2 S 2 o 8 :Na 2 SO 3 ) are respectively 1:30:1:0.01:1:0.08, unit g.

[0037] Step 3: Add 116mL of cyclohexane and 0.184g of Span-60 into the reactor, and slowly add the monomer phase prepared in Step 2 under the conditions of 25°C normal temperature, uniform stirring and nitrogen deoxygenation...

Embodiment 3

[0043] The preparation method of straw-based resin fertilizer comprises the following steps:

[0044] Step 1, straw pretreatment: the corn straw is washed, dried, shortened, crushed, passed through a 100-mesh standard sieve, and straw powder with a particle size below 100 mesh is collected.

[0045] Step 2, configuration of the monomer phase: add acrylamide, polyethylene glycol diacrylate (average weight-average molecular weight 600), urea, K 2 S 2 o 8 , add 0.5 g of straw powder obtained in step 1, and add distilled water to 40 mL under cold water bath and stirring conditions to obtain a monomer phase; wherein, straw: acrylic acid solution: acrylamide: polyethylene glycol diacrylate: urea: ( K 2 S 2 o 8 :Na 2 SO 3 ) are respectively 1:60:2:0.02:2:0.16, unit g.

[0046] Step 3, add 132mL cyclohexane and 0.450g Span-60 into the reactor, and slowly add the monomer phase prepared in step 2 under the conditions of 25°C normal temperature, uniform stirring and nitrogen deox...

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Abstract

The invention relates to a method for preparing a straw-based resin fertilizer. The method comprises the following steps: step 1, grinding crop straws, screening, thereby obtaining straw powder; step 2, sequentially adding an acrylic acid solution, acrylamide, polyethylene glycol biacrylate, urea, K2S2O8 and the straw powder into the reactor under the cold bath and stirring conditions, adding water to the needed volume, thereby obtaining a monomer phase; step 3, adding cyclohexane and Span-60 into the reactor, slowly adding the monomer phase prepared by the step 2, adding Na2SO3, performing suction filtration after the reaction is ended, thereby obtaining bead gel, performing vacuum drying at the temperature of 42-48 DEG C for 4 hours, thereby obtaining the powdered straw-based salt-resistant resin controlled release fertilizer. According to the method disclosed by the invention, the straw-based super absorbent resin fertilizer is prepared at normal temperature, the heating is not needed during the reaction, the reaction is carried out at room temperature, and the method is mild in reaction conditions, energy-saving and environmentally friendly. The prepared fertilizer is high in water absorption and water-retaining property and good in controlled-release effect, and the preparation process is simple and low in price.

Description

technical field [0001] The invention relates to the technical field of fertilizers, in particular to a preparation method of a straw-based resin fertilizer. Background technique [0002] China is a big agricultural country, and it is also a big consumer of chemical fertilizers. The total annual consumption of chemical fertilizers ranks first in the world. Chemical fertilizers play an extremely important role in agricultural production. 55% of the increase in national grain production is due to the application of chemical fertilizers. However, due to their own shortcomings, common chemical fertilizers lead to low utilization rates of chemical fertilizers, which will inevitably result in a great waste of resources. At the same time, it will cause a series of environmental pollution problems. Therefore, how to improve the utilization rate of chemical fertilizers is of great significance to agricultural production. [0003] Slow-release fertilizer production technology has ope...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G3/00C05G3/04C05G3/08C05G3/80C05G3/90
CPCC05C9/00C05G5/30C05D1/00C05F11/00
Inventor 陆荣张峰郑雪琴王成双蔡磊
Owner 徐州禾动力肥料有限公司
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