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Preparation method of nitrocompound fertilizer

A nitro compound fertilizer and compound technology, which is applied in the directions of ammonium nitrate fertilizer, nitrogen fertilizer, and fertilization device, can solve problems such as affecting crops, and achieve the effects of satisfying growth needs, increasing yield and saving costs.

Active Publication Date: 2013-10-02
山东均安生态农业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The growth of crops not only needs nitrogen, phosphorus and potassium, but also calcium, magnesium, sulfur, iron, zinc, manganese, copper, boron, molybdenum and chlorine and other indispensable nutrients. The three elements are equally important and irreplaceable; if they are missing in the soil, the yield and quality of crops will be seriously affected, and the various nutrients nitrogen, phosphorus, potassium, calcium, magnesium, sulfur, iron, zinc, manganese needed by crop , copper, boron, molybdenum, chlorine, etc. all exist in the state of ions, some are cations and some are anions. After that, substances that are not water-soluble and difficult to be absorbed by crops are formed, such as phosphorus combined with calcium or iron to form calcium phosphate or iron phosphate. At present, the above problems have not been solved in the production of nitro compound fertilizers

Method used

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  • Preparation method of nitrocompound fertilizer
  • Preparation method of nitrocompound fertilizer
  • Preparation method of nitrocompound fertilizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1, the preparation method of nitro compound fertilizer, comprises the steps:

[0022] (1) Dechlorination process: adding sulfuric acid with a concentration of 98% into the conversion tank, when the temperature was raised to 90°C, adding potassium chloride according to the mass ratio of potassium chloride: sulfuric acid was 1: 1.4, and carried out under no pressure Reaction generates potassium bisulfate liquid slurry and hydrogen chloride, and hydrogen chloride is absorbed to obtain by-product hydrochloric acid;

[0023] (2) mixed acid operation: potassium bisulfate liquid slurry and concentration are that the monoammonium phosphate solution of 40% joins in the mixed acid tank by mass ratio 1: 1 and mixes;

[0024] (3) Neutralization process: mixed potassium hydrogensulfate liquid slurry, monoammonium phosphate solution and liquid ammonia from the ammonia station enter the tubular reactor together for neutralization reaction to obtain mixed slurry;

[0025] (...

Embodiment 2

[0027] Embodiment 2, the preparation method of nitro compound fertilizer, comprises the steps:

[0028] (1) Dechlorination process: adding sulfuric acid with a concentration of 98% into the conversion tank, when the temperature was raised to 90°C, adding potassium chloride according to the mass ratio of potassium chloride: sulfuric acid was 1: 1.5, and carried out under no pressure Reaction generates potassium bisulfate liquid slurry and hydrogen chloride, and hydrogen chloride is absorbed to obtain by-product hydrochloric acid;

[0029] (2) mixed acid operation: potassium bisulfate liquid slurry and concentration are that the monoammonium phosphate solution of 60% joins in the mixed acid tank by mass ratio 1: 1 and mixes;

[0030] (3) Neutralization process: mixed potassium bisulfate liquid slurry and monoammonium phosphate solution enter the tubular reactor together with liquid ammonia from the ammonia station to carry out neutralization reaction to obtain mixed slurry;

[...

Embodiment 3

[0033] Embodiment 3, the preparation method of nitro compound fertilizer, comprises the steps:

[0034] (1) Dechlorination process: adding sulfuric acid with a concentration of 98% into the conversion tank, when the temperature was raised to 90°C, adding potassium chloride according to the mass ratio of potassium chloride: sulfuric acid was 1: 1.6, and carried out under no pressure Reaction generates potassium bisulfate liquid slurry and hydrogen chloride, and hydrogen chloride is absorbed to obtain by-product hydrochloric acid;

[0035] (2) mixed acid operation: potassium bisulfate liquid slurry and concentration are that the monoammonium phosphate solution of 44% joins in the mixed acid tank by mass ratio 1: 1 and mixes;

[0036] (3) Neutralization process: mixed potassium bisulfate liquid slurry and monoammonium phosphate solution enter the tubular reactor together with liquid ammonia from the ammonia station to carry out neutralization reaction to obtain mixed slurry;

[...

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Abstract

The invention relates to a preparation method of a nitrocompound fertilizer. The preparation method comprises a dechlorinating process, a mixed acid process, a neutralization process, a chelation process and a pelleting and drying process, wherein in the chelation process, trace element compounds and a chelator are added in a reaction kettle for chelation to obtain a chelate, the chelate and 30-40% ammonium nitrate are added in a blending machine for evenly blending to obtain a mixture, and the chelator is used to cover the ions of the trace elements through a chelation process to obtain the chelate, thus the antagonism reaction between the ions of the trace elements in the chelate and other ions is inhibited, water-insoluble substances which are not easy to absorb are generated, the synergy of various nutrient elements are coordinated by adding the trace elements, the growth demand of crops is met, the transformation and utilization rates of chemical fertilizers in soil are improved, so that the yield of the crops is improved and the use cost of the fertilizer is saved.

Description

technical field [0001] The invention relates to a method for preparing agricultural fertilizer, in particular to a method for preparing nitro compound fertilizer, and belongs to the technical field of chemical industry. Background technique [0002] At present, my country's chemical fertilizer industry mainly uses nitrogen, phosphorus, and potassium as raw materials, and adopts physical or chemical synthesis methods to produce three-element compound or compound fertilizers. The production process of NPK compound fertilizers mainly includes: extracting phosphoric acid and sulfuric acid and reacting synthetic ammonia. The basic drum spray granulation process, the drum spray granulation process includes tank reactor process, single tube reactor process, double tube reactor process, tank reactor + tubular reactor mixed reactor process ; KCl and sulfuric acid are transformed into KHSO4 at low temperature and then mixed with phosphoric acid; the drum spray granulation process is bas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05G3/00C05C1/00
Inventor 刘效升刘璐刘国良
Owner 山东均安生态农业科技有限公司