Environment-friendly fertilizer and preparation method thereof

A fertilizer and environmental protection technology, applied in the field of environmental protection fertilizer with slow release function and its preparation, can solve the problems of low effective utilization rate, large amount of waste and high cost, and achieve the promotion of the formation of soil aggregate structure, low cost, and improved utilization. rate effect

Inactive Publication Date: 2018-04-06
孙田田
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention object of the present invention is to provide a kind of environment-friendly fertilizer and preparation method thereof, and this preparation method is simple and easy, does not have high requirement to equipment, and raw material is easy to obtain, aftertreatment is convenient, and price is low, is suitable for large-scale production; The prepared environment-friendly fertilizer It overcomes the technical problems of low effective utilization rate, fast loss, large waste, high cost and environmental pollution of existing traditional fertilizers

Method used

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  • Environment-friendly fertilizer and preparation method thereof

Examples

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Effect test

Embodiment 1

[0022] An environment-friendly fertilizer prepared by blending the following raw materials in parts by weight: 60 parts of phosphate-modified polyaspartic acid, 10 parts of potassium borate, 10 parts of ammonium phosphate, and 2 parts of polyvinyl alcohol;

[0023] Wherein, the preparation method of the phosphate-modified polyaspartic acid comprises the following steps:

[0024] 1) Phosphate-grafted polyaspartic acid: Mix 200 g of polyaspartic acid and 500 g of tris(2-chloroethyl) phosphite, stir and react at 30°C for 3 hours, and wash the product 3 times with ether , and then remove the solvent by rotary evaporation at room temperature;

[0025] 2) Ion exchange: 500 g of phosphate-grafted polyaspartic acid prepared in step 1) was added to 10000 g of sodium humate solution with a mass fraction of 20% at 50° C. and stirred for 40 hours, and then rotated at 80° C. Evaporate to remove water, and wash the product with water 4 times, and finally remove water by rotary evaporation ...

Embodiment 2

[0030] An environmentally friendly fertilizer, prepared by blending the following raw materials in parts by weight: 63 parts of phosphate-modified polyaspartic acid, 12 parts of potassium borate, 12 parts of ammonium phosphate, and 3 parts of polyvinyl alcohol;

[0031] Wherein, the preparation method of the phosphate-modified polyaspartic acid comprises the following steps:

[0032] 1) Phosphate-grafted polyaspartic acid: Mix 300 g of polyaspartic acid and 500 g of tris(2-chloroethyl) phosphite, stir and react at 33°C for 4 hours, and wash the product 4 times with ether , and then remove the solvent by rotary evaporation at room temperature;

[0033] 2) Ion exchange: 500 g of phosphate-grafted polyaspartic acid prepared in step 1) was added to 15,000 g of sodium humate solution with a mass fraction of 13% at 53° C. and stirred for 44 hours, and then rotated at 84° C. Evaporate to remove water, and wash the product with water for 5 times, and finally remove water by rotary ev...

Embodiment 3

[0038] An environmentally friendly fertilizer, prepared by blending the following raw materials in parts by weight: 65 parts of phosphate-modified polyaspartic acid, 14 parts of potassium borate, 13 parts of ammonium phosphate, and 4 parts of polyvinyl alcohol;

[0039] Wherein, the preparation method of the phosphate-modified polyaspartic acid comprises the following steps:

[0040] 1) Phosphate-grafted polyaspartic acid: Mix 350 g of polyaspartic acid and 500 g of tris(2-chloroethyl) phosphite, stir and react at 38°C for 4.5 hours, and wash the product 5 times with ether , and then remove the solvent by rotary evaporation at room temperature;

[0041] 2) Ion exchange: 500 g of phosphate-grafted polyaspartic acid prepared in step 1) was added to 20,000 g of sodium humate solution with a mass fraction of 18% at 58° C. and stirred for 47 hours, and then rotated at 86° C. Evaporate to remove water, and wash the product with water for 6 times, and finally remove water by rotary ...

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Abstract

The invention discloses an environment-friendly fertilizer which is prepared by blending the following raw materials in parts by weight: 60-70 parts of phosphate modified polyaspartic acid, 10-15 parts of potassium borate, 10-15 parts of ammonium phosphate and 2-5 parts of polyvinyl alcohol. The preparation method of the phosphate modified polyaspartic acid comprises the following steps: performing ion exchange on phosphate grafted polyaspartic acid and a sodium humate solution, and the like. The environment-friendly fertilizer is prepared by the steps: performing melt blending on raw materials in a twin-screw extruder, performing extrusion molding, and dicing after cooling, thereby obtaining the environment-friendly fertilizer. The environment-friendly fertilizer disclosed by the invention overcomes the technical defects that the traditional fertilizer is low in effective utilization rate, fast in loss, large in waste and high in cost and causes environmental pollution, has a slow-release effect, and is obvious in fertilizer efficiency, green and environmentally friendly.

Description

technical field [0001] The invention relates to the technical field of agricultural fertilizers, in particular to an environmentally friendly fertilizer with a slow-release function and a preparation method thereof. Background technique [0002] With the continuous growth of the global population, the demand for food is increasing. In the process of food production, fertilizers are indispensable. All the existing artificially cultivated crops, vegetables, fruit trees, green crops, shrubs, trees, etc. The growth of plants is inseparable from fertilizers. my country is a big agricultural country and also a big fertilizer application country, and most of the currently used fertilizers are chemical fertilizers. At present, only 20% to 30% of the chemical fertilizers applied to the soil are absorbed and utilized by the crops of the season. Long-term large-scale application of chemical fertilizers will cause soil acidification, compaction, fertility decline, excessive nitrate conte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05G3/02C05G3/04C08G69/48C05G3/60C05G3/80
CPCC05B7/00C05G3/00C05G3/60C05G3/80C08G69/48C05B15/00C05D1/00
Inventor 孙田田
Owner 孙田田
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