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Rare earth modified slow-release ammonium sulfate fertilizer and preparation method thereof

A technology of rare earth modification and ammonium sulfate, which is applied in the direction of ammonium salt fertilizer, fertilizer mixture, nitrogen fertilizer, etc., can solve the problems of easy scaling and blockage of the system, secondary pollution, high energy consumption, etc., to improve crop quality, increase yield, and promote The effect of plant growth

Pending Publication Date: 2019-03-29
焦智斌
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Limestone-gypsum technology has limitations such as large investment, high energy consumption, and easy fouling and clogging of the system, especially the gypsum produced after desulfurization, which will cause secondary pollution

Method used

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  • Rare earth modified slow-release ammonium sulfate fertilizer and preparation method thereof
  • Rare earth modified slow-release ammonium sulfate fertilizer and preparation method thereof
  • Rare earth modified slow-release ammonium sulfate fertilizer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A rare earth modified slow-release ammonium sulfate fertilizer comprises the following components in parts by weight: 10 parts of rare earth modified hydrated aluminosilicate, 10 parts of pillared bentonite, and 80 parts of ammonium sulfate.

[0027] The preparation method of rare earth modified hydrated aluminosilicate hydrate: add sulfuric acid with a concentration of 5wt% to hydrated sodium aluminosilicate, the solid-liquid ratio of the two is 1:10, stir and mix evenly at 50°C to obtain a reaction solution; Add sodium chloride into the reaction solution, the concentration of sodium chloride in the reaction solution is 30wt%, stir and mix evenly at 50°C, then let it stand for layering, remove the solid reactant in the lower layer, adjust the pH to 6-7, and then mix the solid reactant with the rare earth according to the The mass ratio is 10:1, and microwave solid-phase synthesis is carried out in a tunnel microwave reactor. The microwave solid-phase synthesis adopts a ...

Embodiment 2

[0031] A rare earth modified slow-release ammonium sulfate fertilizer comprises the following components in parts by weight: 20 parts of rare earth modified hydrated aluminosilicate, 10 parts of pillared bentonite, and 70 parts of ammonium sulfate.

[0032] The preparation method of rare earth modified hydrated aluminosilicate hydrate: add sulfuric acid with a concentration of 5wt% to hydrated calcium aluminosilicate, the solid-liquid ratio of the two is 1:10, stir and mix evenly at 50°C to obtain a reaction solution; Add sodium chloride into the reaction solution, the concentration of sodium chloride in the reaction solution is 30wt%, stir and mix evenly at 50°C, then let it stand for layering, remove the solid reactant in the lower layer, adjust the pH to 6-7, and then mix the solid reactant with the rare earth according to the The mass ratio is 10:1, and microwave solid-phase synthesis is carried out in a tunnel microwave reactor. The microwave solid-phase synthesis adopts a...

Embodiment 3

[0036] A rare earth modified slow-release ammonium sulfate fertilizer comprises the following components in parts by weight: 5 parts of rare earth modified hydrated aluminosilicate, 10 parts of pillared bentonite, and 85 parts of ammonium sulfate.

[0037] The preparation method of rare earth modified hydrated aluminosilicate hydrate: add sulfuric acid with a concentration of 5wt% to hydrated magnesium aluminosilicate, the solid-liquid ratio of the two is 1:10, stir and mix evenly at 50°C to obtain a reaction solution; Add sodium chloride into the reaction solution, the concentration of sodium chloride in the reaction solution is 30wt%, stir and mix evenly at 50°C, then let it stand for layering, remove the solid reactant in the lower layer, adjust the pH to 6-7, and then mix the solid reactant with the rare earth according to the The mass ratio is 10:1, and microwave solid-phase synthesis is carried out in a tunnel microwave reactor. The microwave solid-phase synthesis adopts ...

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Abstract

The invention relates to rare earth modified slow-release ammonium sulfate fertilizer. The rare earth modified slow-release ammonium sulfate fertilizer is prepared from the following components in parts by weight: 8-20 parts of rare earth modified hydrated aluminosilicate, 3-15 parts of pillared bentonite, and 70-95 parts of ammonium sulfate. The preparation method comprises the steps that the rare earth modified hydrated aluminosilicate, the pillared bentonite, and the ammonium sulfate are evenly mixed in parts by weight, the temperature is increased to 150-200 DEG C, a salt melting reactionis conducted for 2-4 h, then extruding granulation is conducted, finally, sieving is conducted, and thus the rare earth modified slow-release ammonium sulfate fertilizer is obtained. According to therare earth modified slow-release ammonium sulfate fertilizer and the preparation method thereof, slow-release materials and ammonium sulfate are subjected to optimized combination, the pH value of theslow-release materials is 6-7, the chemical property is stable, the slow-release materials do not react with the ammonium sulfate to reduce the fertilizer efficiency, the slow-release ammonium sulfate fertilizer has the excellent initial fertilizer efficiency and meanwhile has the excellent long-term slow release fertilizer efficiency, plant growth can be promoted significantly, the yield is increased, the crop quality is improved, and the problems that a large amount of traditional ammonium sulfate fertilizer is released in a short term, the fertilizer efficiency is short, the traditional ammonium sulfate fertilizer is applied excessively, and consequently, soil is hardened and acidized are solved.

Description

technical field [0001] The invention belongs to the field of slow-release fertilizers, and in particular relates to a rare-earth modified slow-release ammonium sulfate fertilizer and a preparation method thereof. Background technique [0002] Ammonium sulfate fertilizer is a widely used inorganic soil fertilizer, especially suitable for alkaline soil in the Inner Mongolia area. Its active ingredients are nitrogen and sulfur. Proper use of this fertilizer can keep the nitrogen in the soil at a healthy level and regulate pH balances alkaline soil pH. [0003] The characteristic of ammonium sulfate is that it is very soluble in water, and the release peak will be reached in a short time after application, which will easily cause the initial short-term concentration to be too high. Excessive use will bring unexpected problems to plants, such as excessive growth of leaves, weakness of the main body of the plant, Susceptible to plant diseases and insect pests, etc., the loss rate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05G3/04C05G3/80
CPCC05C3/00C05G3/00C05G3/80C05D9/00C05D9/02
Inventor 焦智斌杨桂娥张冬梅
Owner 焦智斌
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