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Process for preparing nitrogen-phosphorus-potassium-boron compound fertilizer

A compound fertilizer and preparation technology, which is applied in the direction of urea compound fertilizer, ammonium orthophosphate fertilizer, alkaline orthophosphate fertilizer, etc., can solve the problems that boron is difficult to be uniform, and borax or boric acid crystals are difficult to dissolve, so as to improve the solubility and prepare The method is simple and fast, and the effect of good solubility performance

Pending Publication Date: 2018-12-14
ANHUI LIUGUO CHEM CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional nitrogen, phosphorus, potassium and boron compound fertilizers are made by adding boron-containing raw materials into the mixture for physical mixing. The boron in the compound fertilizer is difficult to be uniform, and borax or boric acid crystals are difficult to dissolve in the soil solution.

Method used

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  • Process for preparing nitrogen-phosphorus-potassium-boron compound fertilizer
  • Process for preparing nitrogen-phosphorus-potassium-boron compound fertilizer
  • Process for preparing nitrogen-phosphorus-potassium-boron compound fertilizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Step 1, according to mass proportion, with 4.643 parts of borax (containing 0.5 part of boron of B), 246 parts of wet-process phosphoric acid (P 2 o 5 content of 93.5 parts) was added to the tank reactor; stirred at 50°C for 60 minutes, and the stirring speed was 45 rpm;

[0034] Step 2, add the materials in the tank reactor, 157 parts of sulfuric acid, and 73.61 parts of liquid ammonia (including 60.01 parts of N) into the tubular reactor and react quickly at 120°C (reaction time is about 1 second);

[0035] Step 3, with 268 parts of potassium chloride (containing K 2 O 160.8 parts), 159.6 parts of urea (containing 73.42 parts of N), 150 parts of ammonium dihydrogen phosphate (containing 16.5 parts of N, P 2 o 5 66 parts) were simultaneously added to the granulator, and the material in the tubular reactor and 12.99 parts of liquid ammonia (containing N10.59 parts) were sprayed into the granulator in an atomized state at the same time for mixing and granulation;

[...

Embodiment 2

[0038] Step 1, according to the mass proportion, 7.429 parts of borax (containing 0.8 part of B boron), 246 parts of wet-process phosphoric acid (P 2 o 5content of 93.5 parts) was added to the tank reactor; stirred at 60°C for 60 minutes, and the stirring speed was 55 rpm;

[0039] Step 2, add the material in the tank reactor, 157 parts of sulfuric acid, and 73.61 parts (including 60.01 parts of N) of liquid ammonia to the tubular reactor and react quickly at 120°C (reaction time is about 1 second);

[0040] Step 3, with 268 parts of potassium chloride (containing K 2 O 160.8 parts), 159.6 parts of urea (containing 73.42 parts of N), 150 parts of ammonium dihydrogen phosphate (containing 6.5 parts of N, P 2 o 5 66 parts) were simultaneously added to the granulator, and the material in the tubular reactor and 12.99 parts of liquid ammonia (containing N10.59 parts) were sprayed into the granulator in an atomized state at the same time for mixing and granulation;

[0041] Ste...

Embodiment 3

[0043] Step 1, according to mass proportion, with 4.643 parts of borax (containing 0.5 part of boron of B), 272 parts of wet-process phosphoric acid (P 2 o 5 content of 103.36 parts) was added to the tank reactor; stirred at 50°C for 60 minutes, and the stirring speed was 45 rpm;

[0044] Step 2, add the material in the tank reactor, 174 parts of sulfuric acid, and 81.51 parts (including 6.46 parts of N) of liquid ammonia to the tubular reactor and react quickly at 120°C (reaction time is about 1 second);

[0045] Step 3, with 284.8 parts of potassium chloride (containing K 2 O 170.88 parts), 99.6 parts of urea (containing 45.82 parts of N), 150 parts of ammonium dihydrogen phosphate (containing 16.5 parts of N, P 2 o 5 66 parts) were simultaneously added to the granulator, and the material in the tubular reactor and 14.39 parts of liquid ammonia (containing 11.73 parts of N) were sprayed into the granulator in an atomized state for mixing and granulation;

[0046] Step 4,...

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Abstract

The invention relates to a process for preparing a nitrogen-phosphorus-potassium-boron compound fertilizer. The process disclosed by the invention comprises the following steps: 1, adding boron-containing raw materials and wet-process phosphoric acid into a tank reactor to react; 2, reacting the materials in the tank reactor, sulfuric acid (H2SO4), liquid ammonia or gaseous ammonia (NH3) in a tubereactor; 3, spraying the materials in the tube reactor and the liquid ammonia into a granulator in a spray pattern to be mixed and granulated with powdered materials containing potassium, nitrogen and phosphorus; 4, drying, screening and cooling the discharged material in the granulator, thereby obtaining the nitrogen-phosphorus-potassium-boron compound fertilizer. The nitrogen-phosphorus-potassium-boron compound fertilizer prepared by the process disclosed by the invention is uniform in boron, the boron salt solubility in the product after dissolution and reaction is obviously improved, andthe product has excellent solubility in the soil solution.

Description

technical field [0001] The invention belongs to the technical field of compound fertilizers, and in particular relates to a preparation process of nitrogen, phosphorus, potassium and boron compound fertilizers. Background technique [0002] Nitrogen, phosphorus, and potassium are three mineral elements that are required for plant growth and have important physiological functions, so nitrogen, phosphorus, and potassium are often called the three elements of fertilizers. The GB 15063-2009 national standard defines compound fertilizers as fertilizers made only by chemical methods in which there are at least two of the three nutrients nitrogen, phosphorus, and potassium in the indicated amount. It is a type of compound fertilizer. In a broad sense, compound fertilizers refer to chemical fertilizers that contain two or more nutrient elements and include a chemical reaction process in the preparation process. In 1966, Nanjing Chemical Industry Company built a diammonium phosphate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G1/00
CPCC05B7/00C05C3/00C05C9/00C05D1/02
Inventor 韩效钊沈浩郑之银刘荣张旭刘昆张浩马克蒋昱黄晗达彭克荣柯鸣浩高向南岳茂武杨豹嶂张俊朱英俊
Owner ANHUI LIUGUO CHEM CO LTD
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