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Method for preparing water-soluble ammonium polyphosphate by electromagnetic radiation

A technology of electromagnetic radiation and water-soluble polymer, applied in chemical instruments and methods, phosphorus compounds, inorganic chemistry, etc., can solve the problems of low water solubility, complex production process, high production cost, etc., and achieve good water solubility, high nutrient content, The effect of reducing production costs

Inactive Publication Date: 2018-09-11
JINAN HANGCHEN BIOTECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome many disadvantages of the existing production method, provide a kind of preparation method of the water-soluble ammonium polyphosphate with simple process and low cost, solve the complex production process of the existing water-soluble ammonium polyphosphate production, high production cost, The problem of low water solubility

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Pre-polymerization: Add urea and monoammonium phosphate into the reactor at a molar ratio of 0.8:1, react for 2 minutes under the condition of electromagnetic radiation power of 130W, and the physical form changes from solid to liquid.

[0019] (2) Polymerization and curing: The reactant is subjected to electromagnetic radiation for 3 minutes at a power of 375W, and the substance undergoes a polymerization reaction and turns from a liquid state to a solid state.

[0020] (3) Pulverization: pulverize the final reactant to obtain powdery water-soluble ammonium polyphosphate.

[0021] The indicators of the obtained water-soluble solid ammonium polyphosphate are: polymer n=5, water-insoluble matter<0.1%, m(N)=18%, m(P2O5)=53%.

Embodiment 2

[0023] (1) Pre-polymerization: Add urea and monoammonium phosphate into the reactor at a molar ratio of 1.1:1, react for 3 minutes under the condition of electromagnetic radiation power of 150W, and the physical form changes from solid to liquid.

[0024] (2) Polymerization and curing: The reactant is subjected to electromagnetic radiation for 5 minutes at a power of 400W, and the substance undergoes a polymerization reaction and turns from a liquid state to a solid state.

[0025] (3) Pulverization: pulverize the final reactant to obtain powdery water-soluble ammonium polyphosphate.

[0026] The indicators of the obtained water-soluble solid ammonium polyphosphate are: polymer n=7, water-insoluble matter<0.1%, m(N)=21%, m(P2O5)=60%.

Embodiment 3

[0028] (1) Pre-polymerization: Add urea and monoammonium phosphate into the reactor at a molar ratio of 1.3:1, react for 1 min under the condition of electromagnetic radiation power of 170W, and the physical form changes from solid to liquid.

[0029] (2) Polymerization and curing: The reactant is subjected to electromagnetic radiation for 3 minutes at a power of 450W, and the substance undergoes a polymerization reaction and turns from a liquid state to a solid state.

[0030] (3) Pulverization: pulverize the final reactant to obtain powdery water-soluble ammonium polyphosphate.

[0031] The indicators of the obtained water-soluble solid ammonium polyphosphate are: polymer n=9, water-insoluble matter<0.1%, m(N)=19%,

[0032] m(P2O5)=57%.

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Abstract

The invention belongs to the technical field of water-soluble fertilizer preparation and relates to a production technology for preparing full water-soluble ammonium polyphosphate by electromagnetic radiation. According to the method, urea and monoammonium phosphate are used as raw materials. the method mainly comprises two phases: (1) prepolymerization: respectively adding monoammonium phosphateand urea into a reaction vessel, reacting at the electromagnetic radiation power of 100-150 W for 1-3 min until a solid state is converted into a liquid state in the physical form; 2) polymerization and solidification: carrying out electromagnetic radiation on the reactants at the power of 375-450 W for 3-5 min until substances undergo a polymerization reaction and a liquid state is converted intoa solid state; and 3) crushing: crushing the final reactant to obtain powdery granulated water-soluble ammonium polyphosphate. The method of the invention has a simple process, energy consumption islow, time is short, and cost is low. The produced ammonium polyphosphate solid product has good water solubility, and weight of undissolved substances is less than 0.1%. The product can be used in thefield of liquid fertilizers or other fertilizers, and the development of our modern agriculture can be greatly promoted.

Description

technical field [0001] The invention belongs to the technical field of water-soluble fertilizer preparation, and relates to a production technology for preparing fully water-soluble ammonium polyphosphate by using an electromagnetic radiation method. Background technique [0002] Ammonium polyphosphate is also called ammonium polyphosphate or polycondensed ammonium phosphate (abbreviated as APP). According to its degree of polymerization, it can be divided into three types: low polymerization, medium polymerization and high polymerization. The higher the degree of polymerization, the lower the water solubility, and vice versa, the greater the water solubility. When the degree of polymerization of ammonium polyphosphate is less than 20, it has water solubility, slow release and chelating effect, and the pH of its aqueous solution is neutral. It is a polyphosphate with high N and P content and can be used as a plant fertilizer. Its crystallization temperature is low, it is no...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/40
CPCC01B25/405
Inventor 岳秋林李昆仑赵林梁艳李宝君
Owner JINAN HANGCHEN BIOTECHNOLOGY CO LTD