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Large-granule sustained-release ammonium chloride fertilizer, preparation method thereof and special granulating sustained-release material

A technology of slow-release ammonium chloride and slow-release materials, which is applied in the fields of large-grain slow-release ammonium chloride fertilizers and their preparation and special granulated slow-release materials, and can solve problems such as pollution, incomplete solutions, and residual soil pollution. , to achieve the effect of simple production process, easy popularization and application, and high particle strength

Inactive Publication Date: 2013-02-06
HUBEI FORBON TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the former adhesive (glue) materials use water as the dispersion medium. Although the safety and pollution problems in the fertilizer manufacturing process are basically solved, a large amount of petroleum-based organic matter is still used as the mixed (poly) component. The residual pollution problem has not been completely resolved, and this sticky (glue) material is mostly used as an outer coating (film) slow-release material of a granular fertilizer; although the latter is used as an endoplasmic slow-release binder materials, but the slow-release fertilizers prepared by it are mostly irregular shapes such as rods

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Preparation of granulated slow-release materials:

[0037] 1) Add 120.0 g of urea to the reactor, add 240.0 g of water, stir to dissolve it, adjust the pH value to 9.5 with a mass concentration of 30% sodium hydroxide, add a metered 108.0 g of a mass concentration of 37% formaldehyde solution, and Stir at 85°C for 2.0 h;

[0038] 2) Adjust the pH value to 6.0 with a mass concentration of 30% sulfuric acid solution, continue to stir at 85°C for 1.0 h, then adjust the pH value to 8.5 with a mass concentration of 30% sodium hydroxide solution, cool and discharge to obtain the manufactured granular slow-release material.

[0039] The solid content of the prepared granulated slow-release material was 30.6%, and the mass fraction of slow-release effective nitrogen was 13.6%.

[0040] (2) Preparation of large particle slow-release ammonium chloride fertilizer:

[0041] 1) Weigh 2.0 kg of ammonium chloride powder with a particle size of less than 0.3 mm and add it to the...

Embodiment 2

[0046] (1) Preparation of granulated slow-release materials:

[0047] 1) Add 90.0 g of urea to the reactor, add 450.0 g of water, stir to dissolve, adjust the pH value to 9.5 with a mass concentration of 30% sodium hydroxide solution, add 81.0 g of a mass concentration of 37% formaldehyde solution, at 80 ℃ Stir for 2.0 h, then add 27.0 g of glucose, adjust the pH value to 9.5, and continue stirring for 1.0 h;

[0048] 2) Use 30% formic acid solution to adjust the pH value to 5.5, continue to stir at 80 °C for 1.0 h, then adjust the pH value to 8.5 with triethanolamine, cool and discharge to obtain the granulated sustained-release material.

[0049] The solid content of the prepared granulated slow-release material was 19.5%, and the mass fraction of slow-release effective nitrogen was 11.8%.

[0050] (2) Preparation of large particle slow-release ammonium chloride fertilizer:

[0051] 1) Weigh 2.0 kg of ammonium chloride powder with a particle size of less than 0.3 mm and ad...

Embodiment 3

[0056] (1) Preparation of granulated slow-release materials:

[0057] 1) Add 144.0 g of urea to the reactor, add 360.0 g of water, stir to dissolve, adjust the pH value to 10 with a mass concentration of 30% potassium hydroxide solution, add 45.0 g of paraformaldehyde, and stir at 90 °C for 1.0 h, Then add 21.6 g of melamine, and adjust the pH value to 10, and continue to stir for 0.5 h;

[0058] 2) Use a phosphoric acid solution with a mass concentration of 30% to adjust the pH value to 6.0, continue stirring at 90°C for 0.5 h, adjust the pH value to 9.0 with a mass concentration of 30% potassium hydroxide, cool and discharge to obtain the granulation buffer explanatory material.

[0059] The solid content of the prepared granulated slow-release material was 33.5%, and the mass fraction of slow-release effective nitrogen was 9.5%.

[0060] (2) Preparation of large particle slow-release ammonium chloride fertilizer:

[0061] 1) Weigh 5.0 kg of ammonium chloride powder with ...

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Abstract

The invention discloses a large-granule sustained-release ammonium chloride fertilizer, a preparation method thereof and a special granulating sustained-release material. The special granulating sustained-release material comprises urea, aldehyde, modifiers, acidoid, alkaline matters and water, the mole ratio of the urea to the aldehyde is 1-5:1, the mass of the modifiers accounts for 0-30% of that of the urea, the acidoid and the alkaline matters are used for regulating the system pH (potential of hydrogen) value, and the mass of the water is 2-5 times of that of the urea. The large-granule sustained-release ammonium chloride fertilizer is prepared by using commercial ammonium chloride powder as a basal fertilizer and agglomerating, bonding and granulating the granulating sustained-release material. The special granulating sustained-release material has excellent fluidity and stability, has no corrosion to equipment, and is high in granulation balling rate, mellow and smooth in granule and high in granule strength. Besides, the large-granule sustained-release ammonium chloride fertilizer is simple in production process, can be achieved by a normal disc or a drum, low in cost, high in yield and convenient for popularization and application.

Description

technical field [0001] The invention relates to a large particle slow-release ammonium chloride fertilizer, a preparation method thereof and a special granulated slow-release material. Background technique [0002] Ammonium chloride is a by-product of the soda ash industry, and its output is about 1.07 times that of soda ash. According to the survey, the current domestic ammonium chloride production capacity is about 20 million tons per year, and its actual annual output is also close to 10 million tons. Such high-yield ammonium chloride is mostly used in agriculture except for its wide application in medicine and industry. As a quick-acting nitrogen fertilizer, the nitrogen content of agricultural ammonium chloride fertilizer is more than 25%. A large number of studies and practices have shown that this chlorine-based quick-acting nitrogen fertilizer is suitable for neutral and alkaline soils, and its effect on rice, especially early rice, is very obvious, and it is also ...

Claims

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Application Information

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IPC IPC(8): C05G3/08C05G3/90
Inventor 王仁宗陈文求徐祖顺陈敏杰
Owner HUBEI FORBON TECH
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