Preparation method of high nitrogen compound fertilizer

A high-nitrogen compound fertilizer and phosphoric acid technology, applied in nitrogen fertilizer, phosphate fertilizer, fertilization device, etc., can solve the problems of lack of trace elements, unsuitable saline-alkali soil, etc., to promote comprehensive growth and development, high improvement efficiency, and easy absorption. Effect

Inactive Publication Date: 2018-09-04
GUIYANG KAILIN FERTILIZER CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the patent document uses ammonium bisulfate, the fertilizer is mainly sui

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0026] Example 1

[0027] A preparation method of high-nitrogen compound fertilizer includes:

[0028] (1) Mix sulphur and water at a mass ratio of 10:3, add them to the reactor and heat, keep the temperature for 3 minutes when the temperature rises to 90 ℃ under normal pressure, and then pressurize to 120 ℃, keep the temperature for 20 minutes;

[0029] (2) Mix phosphoric acid with the sulfur and sodium dodecyl sulfonate obtained in step (1) at 115° C., mix and react with ammonia gas to obtain the reaction solution, add nano activated carbon and stir for 20 minutes, cool down and crystallize, and separate the crystals; The mass concentration of the phosphoric acid is 45%; the mass ratio of the sulfur, phosphoric acid, ammonia, and sodium dodecyl sulfonate is 9:95:11:0.04; the mass ratio of the reaction liquid to the nano activated carbon is 100:9; the conditions for the cooling crystallization: the temperature is reduced to 8°C, and the crystallization is 1.5h.

[0030] (3) The obta...

Example Embodiment

[0031] Example 2

[0032] A preparation method of high-nitrogen compound fertilizer includes:

[0033] (1) Mix sulfur and water at a mass ratio of 10:3, add them to the reactor and heat, keep the temperature for 5 minutes when the temperature rises to 100°C under normal pressure, and then pressurize to 130°C for 40 minutes;

[0034] (2) Mix phosphoric acid with the sulfur and sodium dodecyl sulfonate obtained in step (1) at 120° C., mix and react with ammonia gas to obtain the reaction solution, add nano-activated carbon and stir for 30 minutes, cool down and crystallize, and separate the crystals; The mass concentration of the phosphoric acid is 55%; the mass ratio of the sulfur, phosphoric acid, ammonia, and sodium dodecyl sulfonate is 11:110:11:0.04; the mass ratio of the reaction solution to the nano activated carbon is 100:9; the conditions of the cooling crystallization: the temperature drops to 22°C, and the crystallization is performed for 3 hours.

[0035] (3) The obtained c...

Example Embodiment

[0036] Example 3

[0037] A preparation method of high-nitrogen compound fertilizer includes:

[0038] (1) Mix sulfur and water at a mass ratio of 10:3, add them to the reactor to heat, and keep the temperature for 3-5 minutes when the temperature rises to 95°C under normal pressure, and then pressurize to 125°C for 26 minutes;

[0039] (2) Mix phosphoric acid with the sulfur and sodium dodecyl sulfonate obtained in step (1) at 117° C., mix and react with ammonia gas to obtain the reaction solution, add nano-activated carbon and stir for 27 minutes, cool down and crystallize, and separate the crystals; The mass concentration of the phosphoric acid is 48%; the mass ratio of the sulfur, phosphoric acid, ammonia, and sodium dodecyl sulfonate is 10:98:11:0.04; the mass ratio of the reaction liquid to the nano activated carbon is 100:9; the conditions of the cooling crystallization: the temperature drops to 11°C, and the crystallization is 1.6h.

[0040] (3) The obtained crystals are mixe...

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Abstract

The invention relates to the technical field of fertilizer, in particular to a preparation method of high nitrogen compound fertilizer. The preparation method comprises the following steps: uniformlymixing liquefied sulfur with sodium dodecyl sulfonate phosphate, and carrying out mixed reaction on a mixture and ammonia gas; adding nano-activated carbon for carrying out cooling crystallization andseparating out a crystal; then mixing the crystal with potassium nitrate and ammonium zinc sulfate for granulating to obtain acid fertilizer. The acid fertilizer disclosed by the invention has high acidity, can reduce the pH value of soil and is especially suitable for the improvement on alkaline soil; the acid fertilizer has the advantages of quick effect, high improvement efficiency and low useamount, so that the yield and the quality of crops are improved and overall growth and development of plants are promoted.

Description

technical field [0001] The invention relates to the technical field of fertilizers, in particular to a method for preparing high-nitrogen compound fertilizers. Background technique [0002] Alkaline soil refers to the soil whose pH value is greater than 7, that is, the concentration of hydroxide ions in the soil solution is greater than the concentration of hydrogen ions. In practice, it refers to the soil with a pH value above 7.3. In the northern part of my country, there are a lot of calcareous soil and saline-alkaline soil. Due to the volatilization of ammonium nitrogen in alkaline soil, phosphorus is fixed, and the solubility of calcium and magnesium in strongly alkaline soil is low, and the effectiveness is reduced. The availability of trace elements such as zinc, manganese, and copper is greatly reduced in alkaline soil, making it difficult to use large-scale soil resources. [0003] At present, domestic saline-alkali land improvement and utilization methods and tech...

Claims

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Application Information

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IPC IPC(8): C05G3/00C05G3/04C05G3/80
CPCC05B7/00C05G3/00C05G3/80C05G5/12C05C5/02C05D9/00C05D9/02
Inventor 吴有丽项双龙徐立钦罗付浪廖吉星何润林韩朝应唐丽君何花王采艳
Owner GUIYANG KAILIN FERTILIZER CO LTD
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