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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 suitable for soils lacking trace elements, and is not suitable for saline-alkali soils

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

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

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

[0030] (3) Mix and g...

Embodiment 2

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

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

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

[0035] (3) Mix and granulate ...

Embodiment 3

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

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

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

[0040] (3) Mix and granulate the obtaine...

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PUM

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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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