Particulate compound fertilizer containing polymeric phosphorus and preparation method thereof

A compound fertilizer and compound fertilizer technology, applied in the field of particulate compound fertilizer containing polymeric phosphorus and its preparation, can solve the problems of excessive application of chemical fertilizers, environmental pollution, cost increase, etc., and achieve the goals of reducing the amount of application, protecting the ecological environment, and reducing damage Effect

Pending Publication Date: 2019-06-25
云南云天化以化磷业研究技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the current situation of fertilization in my country, there are problems such as excessive application of chemical fertilizers and blind application, which have brought about increased costs and environmental pollution. Therefore, it is urgent to improve fertilization methods and improve fertilizer utilization.

Method used

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  • Particulate compound fertilizer containing polymeric phosphorus and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Take by weight, 28 parts of urea, wet purification phosphoric acid (P 2 o 5 Content is 54%) 65 parts are mixed, and mixing temperature is 60 ℃, and mixing time is 20 minutes, 170 ℃ of high-temperature polymerization reaction 80 minutes, reaction finishes and cools to 40 ℃, obtains powdery polyphosphorus compound fertilizer.

[0032] Weighing 1.5% humic acid of the mass of the powdery polymeric phosphorus compound fertilizer was added to the powdery polymeric phosphorus compound fertilizer to activate it. Then, the obtained powdery polymerized phosphorus compound fertilizer is subjected to a micro-granule extrusion granulation process, and sieved with a vibrating screen of 0.5-1.0mm to produce nitrogen and phosphorus (N+P 2 o 5 ) Particulate compound fertilizer products containing aggregated phosphorus with a total nutrient ≥ 76%.

Embodiment 2

[0034] Take by weight, 30 parts of urea, wet-process concentrated phosphoric acid (P 2 o 5 Content is 46%) 75 parts) and potassium sulfate 7 parts are mixed, mixing temperature is 80 DEG C, mixing time is 30 minutes, 185 DEG C of high-temperature polymerization reaction 90 minutes, reaction is finished and cooled to 50 DEG C, obtains powdery polymeric phosphorus compound fertilizer.

[0035] Weigh 2.0% of the citric acid that accounts for the mass of the powdery polymerized phosphorus compound fertilizer and add it to the powdery polymerized phosphorus compound fertilizer to activate it.

[0036] The obtained powdery polymerized phosphorus compound fertilizer is sieved by a 0.5-1.0mm vibrating sieve through a boiling fluidized granulation process to produce nitrogen, phosphorus and potassium (N+P 2 o 5 +K 2 O) The granular compound fertilizer product containing aggregated phosphorus with total nutrient ≥ 64%.

Embodiment 3

[0038] Take by weight, 31 parts of urea, wet purification phosphoric acid (P 2 o 5 Content is 54%) 30 parts, 9 parts of monoammonium phosphate and 44 parts of potassium nitrate are mixed, the mixing temperature is 100 ° C, the mixing time is 35 min, 200 ° C high temperature polymerization reaction for 120 minutes, the reaction is completed and cooled to 50 ° C to obtain powdery polymerization Phosphorus compound fertilizer.

[0039]Humic acid accounting for 2.0% of the mass of the powdery polymerized phosphorus compound fertilizer was weighed and added to the powdery polymerized phosphorus compound fertilizer to activate it.

[0040] The obtained powdery polymerized phosphorus compound fertilizer is sieved with a vibrating sieve of 0.8 to 1.5mm through a fine particle extrusion granulation process to produce nitrogen, phosphorus and potassium (N+P 2 o 5 +K 2 O) The granular compound fertilizer product containing polyphosphorus with total nutrient ≥ 60%.

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Abstract

The invention provides a particulate compound fertilizer containing polymeric phosphorus. The particle size of the compound fertilizer is 0.1-2.0 mm, and the total nutrient of nitrogen, phosphorus andpotassium is greater than or equal to 55 wt%; wherein the content of poly-P2O5 accounts for more than 30wt% of the total P2O5 content of the product. The particle compound fertilizer can be directlysown and planted together with crop seeds and tubers, the usage amount is reduced by 20-40% or above compared with that of a conventional compound fertilizer, and the utilization rate of the phosphorus fertilizer is greater than 70%. The fertilizer has the beneficial effects of reducing weight, improving efficiency, reducing damage to soil caused by excessive fertilization and protecting the ecological environment. The invention further provides a preparation method of the particulate compound fertilizer containing the polymerized phosphorus.

Description

technical field [0001] The invention relates to the technical field of fertilizer preparation, in particular to a particulate compound fertilizer containing polymerized phosphorus and a preparation method thereof. Background technique [0002] Polyphosphate is a general term for a series of polymer phosphate compounds obtained through condensation polymerization of phosphoric acid, so it also has names such as polycondensed phosphate and molecular dehydrated phosphate. Polyphosphate fertilizer is an eye-catching compound fertilizer variety in modern fertilizers. It has high nutrient content and contains polymerized phosphorus. It is gradually hydrolyzed into orthophosphate in the soil and absorbed by plants, so the fertilizer has a slow-release effect; polymerized phosphate contains weak acid Roots have the function of complexing metal ions, and can react with the medium and trace elements added to the fertilizer or the ineffective trace elements in the soil to form soluble ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/04C05G3/00C05G3/80
Inventor 曾波杨先舒艺周白正斌马航杨东
Owner 云南云天化以化磷业研究技术有限公司
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