Compound fertilizer and preparation method thereof

A compound fertilizer and ammonium nitrate technology, applied in the agricultural field, can solve the problems of single nutrient and low concentration, and achieve the effects of improving water solubility, low cost, and overall cost reduction

Inactive Publication Date: 2012-07-18
朱绍禄
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cost of nitrogen in calcium ammonium nitrate is higher than the cost of nitrogen in ordinary ammonium nitrate, its concentration is low, and the nutrient is single

Method used

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  • Compound fertilizer and preparation method thereof
  • Compound fertilizer and preparation method thereof

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preparation example Construction

[0091] The present invention also provides a method for preparing compound fertilizer as described in any one of the above, comprising the following steps:

[0092] A. Phosphate rock is treated by chemical reaction with nitric acid;

[0093] B. with ammonia NH The reaction product that step A obtains is processed;

[0094] C. process the reaction product that step B obtains with ammonium nitrate; Reaction time 10~30min

[0095] D. Granulation;

[0096] E. Packaging.

[0097] In some embodiments,

[0098] In step A, the temperature at which the chemical reaction occurs is preferably 50°C to 80°C;

[0099] and / or,

[0100] The concentration of the nitric acid is preferably 50% to 70%;

[0101] and / or,

[0102] The mass addition ratio of the phosphate rock and the nitric acid is preferably 1:1-2;

[0103] and / or,

[0104] The chemical reaction occurring between the phosphate rock and the nitric acid is preferably:

[0105] 2Ca 5 F(PO4) 3 +15HNO 3 =5Ca 3 (NO 3...

specific Embodiment 1

[0124] Specific embodiment 1, preparation Ca 3 (NH 4 ) 8 HPO 4 ) 3 (H 2 PO 4 ) 4 (NO 3 ) 2 SO 4 ~NH 4 NO 3 ,like figure 1 , as shown in:

[0125] Step 101, chemical reaction occurs between nitric acid and phosphate rock;

[0126] Nitric acid and phosphate rock undergo a chemical reaction, and nitric acid can directly decompose phosphate rock to obtain the nutrients needed by crops;

[0127] Among them, the concentration of nitric acid is preferably 50% to 70%. It should be noted that the above-mentioned range includes any value in this interval, as long as the points included in the above-mentioned ratio range are the scope of protection of the present invention, such as: 50%, 52%, 54%, 56%, 58%, 60%, 62%, 64%, 66%, 68%, 70% or the range between any two values, preferably 56%;

[0128] The reaction temperature is 50°C to 80°C; it should be noted that the above-mentioned range includes any value in the interval, as long as the points included in the above-mention...

specific Embodiment 2

[0155] Specific embodiment 2, preparation Ca 3 (NH4 ) 6 (HPO 4 ) 3 (H 2 PO 4 ) 4 (NO 3 ) 2 ~NH 4 NO 3 ,like figure 2 , as shown in:

[0156] Step 201, a chemical reaction occurs between nitric acid and phosphate rock;

[0157] Nitric acid and phosphate rock undergo a chemical reaction, and nitric acid can directly decompose phosphate rock to obtain the nutrients needed by crops;

[0158] Among them, the concentration of nitric acid is preferably 50% to 70%. It should be noted that the above-mentioned range includes any value in this interval, as long as the points included in the above-mentioned ratio range are the scope of protection of the present invention, such as: 50%, 52%, 54%, 56%, 58%, 60%, 62%, 64%, 66%, 68%, 70% or the range between any two values, preferably 56%;

[0159] The reaction temperature is 50°C to 80°C; it should be noted that the above-mentioned range includes any value in the interval, as long as the points included in the above-mentioned r...

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Abstract

The invention relates to the field of agriculture, and in particular relates to a compound fertilizer and a preparation method thereof. The compound fertilizer comprises the following raw materials: nitric acid, phosphorite, ammonium nitrate and ammonia NH3, wherein the mass adding ratio of nitric acid to phosphorite to ammonium nitrate to ammonia NH3 is 1: (1-2): (1.5-3): (0.05-0.3), and also comprises ammonium sulfate, and / or monoammonium phosphate and / or potassium sulfate. The method for preparing the compound fertilizer comprises the following steps of: A, treating the phosphorite by using nitric acid through chemical reaction; B, treating the reaction product obtained in the step A, ammonium sulfate, and / or monoammonium phosphate and / or potassium sulfate by using ammonia NH3, and / or controlling the moisture to be 12-28 percent; C, treating the reaction product obtained in the step B by using ammonium nitrate, and / or controlling the moisture to be 1-5 percent; D, granulating; and E, packing. By the method, water solubility of calcium in the compound fertilizer can be improved.

Description

technical field [0001] The invention relates to the field of agriculture, in particular to a compound fertilizer and a preparation method thereof. Background technique [0002] Compound fertilizer refers to a fertilizer made only by chemical methods with at least two of the three nutrients nitrogen, phosphorus, and potassium. It is a kind of compound fertilizer. Fertilizer selection refers to high-efficiency fertilizers that can provide the nutrients needed by plants according to the needs of the soil and crops. Organic fertilizers, inorganic high-efficiency fertilizers, etc. Among them, the compound fertilizer with multiple single nutrient fertilizers has simple production process, low technical content, mature industrial equipment, high production cost, low profit and low labor intensity. In the reaction to produce two-component and above fertilizers, for example: the characteristics of calcium ammonium nitrate and the application of calcium ammonium nitrate (molecular f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G1/00C05G3/00
Inventor 朱绍禄
Owner 朱绍禄
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