Preparation method of polymerization chelating water-soluble fertilizer

A technology of water-soluble fertilizer and chelation, which is applied in the direction of urea compound fertilizer, alkaline orthophosphate fertilizer, nitrogen fertilizer, etc., can solve the problems of rapid loss of fertilizer efficiency, insufficient chelation effect of water-soluble fertilizer, and low fertilizer utilization rate, so as to avoid soil Compaction, good affinity and chemical stability, fast replenishment effect

Inactive Publication Date: 2017-04-19
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Aiming at the current situation of insufficient chelating effect of water-soluble fertilizer, rapid loss of fertilizer efficiency and low fertilizer utilization rate, a preparation method of polymeric chelating water-soluble fertilizer is proposed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A polymeric chelating water-soluble fertilizer, its components and preparation method are as follows:

[0035] (1) Dissolve 20g of modified humic acid and 15g of sodium ethylenediaminetetraacetate in 400mL of water, heat to 35ºC, stir slowly at a speed of 25 rpm and add 12g of white carbon black until the chelating agent and white carbon After the black is fully combined for 50 minutes, suspension A is obtained;

[0036](2) Will be rich in various elements including 4g calcium hydrogen phosphate, 8g urea, 2g ammonium sulfate, 0.5g industrial grade potassium dihydrogen phosphate, 0.5g industrial grade ammonium dihydrogen phosphate, 0.5g ammonium bicarbonate, 0.5g potassium phosphate , potassium nitrate 0.5g, zinc sulfate 0.01g, iron sulfate 0.01g, copper sulfate 0.01g fertilizer pre-dissolved in 250mL deionized water to obtain solution B;

[0037] (3) After mixing suspension A and solution B, heat to 35ºC, and stir at a constant speed of 30 rpm for 30 minutes to chelate...

Embodiment 2

[0040] A polymeric chelating water-soluble fertilizer, its components and preparation method are as follows:

[0041] (1) Dissolve 10g of modified humic acid, 5g of sodium citrate, and 15g of polyacrylic acid in 400mL of water, heat to 35ºC, stir slowly at a speed of 50 rpm, and add 15g of microporous white carbon black, wait for chelation After the mixture is fully combined with white carbon black for 30 minutes, suspension A is obtained;

[0042] (2) Will be rich in various elements including calcium hydrogen phosphate 1g, urea 8g, ammonium sulfate 2g, industrial grade potassium dihydrogen phosphate 2g, industrial grade ammonium dihydrogen phosphate 1g, ammonium bicarbonate 0.5g, potassium phosphate 1.5g, nitric acid 0.5g of potassium, 0.01g of zinc sulfate, 0.01g of iron sulfate, and 0.01g of copper sulfate were pre-dissolved in 250mL of deionized water to obtain solution B;

[0043] (3) After mixing suspension A and solution B, heat to 35ºC, and stir at a constant speed o...

Embodiment 3

[0046] A polymeric chelating water-soluble fertilizer, its components and preparation method are as follows:

[0047] (1) Dissolve 20g of polymerized amino acid and its salt mixture, 5g of sodium edetate, and 10g of sodium citrate in 400mL of water, heat to 35ºC, stir slowly at a speed of 40 rpm and add white carbon Black 10g, after the chelating agent is fully combined with white carbon black for 60 minutes, suspension A is obtained;

[0048] (2) Will be rich in various elements including 1g calcium hydrogen phosphate, 12g urea, 1g ammonium sulfate, 0.2g industrial grade potassium dihydrogen phosphate, 0.2g industrial grade ammonium dihydrogen phosphate, 0.2g ammonium bicarbonate, 0.5g potassium phosphate , potassium nitrate 0.5g, zinc sulfate 0.01g, iron sulfate 0.01g, copper sulfate 0.01g, boric acid 0.01g, ammonium molybdate 0.01g fertilizer pre-dissolved in 250mL deionized water to obtain solution B;

[0049] (3) After mixing suspension A and solution B, heat to 35ºC, an...

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Abstract

The invention relates to a preparation method of a polymerization chelating water-soluble fertilizer. The preparation method is characterized in that a conventional chelating agent and white carbon black are subjected to soaking treatment, so that the chelating efficiency of the chelating agent on nutrition ions is improved; a fertilizer is predissolved, and is uniformly mixed with the pretreated white carbon black so that the chelation is sufficient; an acrylamide solution is added; an acrylamide polymerization process is used; in the process of forming polyacrylamide by acrylamide polymerization, various nutritional ingredients in the fertilizer are polymerized into white carbon black particles; and spray drying is performed to obtain solid powder type small particles, and the particles are the polymerization chelating water-soluble fertilizer. The fertilizer has the advantages of good water dispersibility and excellent slow-release performance, and the fertilizer efficiency loss can be effectively prevented.

Description

technical field [0001] The invention belongs to the technical field of agricultural fertilizers, and in particular relates to a preparation method of a chelating water-soluble fertilizer, in particular to a polymerized chelating water-soluble fertilizer with white carbon black as a carrier. Background technique [0002] my country is a large agricultural country with a large population and a serious shortage of water resources. The per capita water consumption is only equivalent to 1 / 4 of the world's per capita water supply. In recent years, water resources used for agricultural production are also facing an increasingly scarce situation. How to improve the utilization rate of water resources has become a very serious problem. Water-soluble fertilizer is a high-efficiency fertilizer that can quickly dissolve in water and be quickly absorbed by plants. Its outstanding features are: (1) Plants can absorb it in a short time, and the fertilizer effect is fast; (2) It has high n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05G3/04C05G3/80
CPCC05B3/00C05G3/00C05G3/80C05G5/12C05G5/37C05B7/00C05C3/00C05C5/02C05C9/00C05D9/02C05F11/02
Inventor 陈庆曾军堂王镭迪
Owner CHENDU NEW KELI CHEM SCI CO LTD
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