A kind of ammonium polyphosphate with high degree of polymerization and preparation method thereof

A technology with high polymerization degree of ammonium polyphosphate, applied in chemical instruments and methods, phosphorus compounds, inorganic chemistry, etc., can solve the problems of low polymerization degree of ammonium polyphosphate, achieve high product value, simple process, and concise process principle Effect

Inactive Publication Date: 2017-06-09
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is aimed at the problem of low polymerization degree of domestically synthesized ammonium polyphosphate. The present invention provides a method for using low polymerization degree ammonium polyphosphate as raw material to synthesize high polymerization degree ammonium polyphosphate through shock wave high pressure ; And provide a kind of high degree of polymerization ammonium polyphosphate prepared by the method

Method used

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  • A kind of ammonium polyphosphate with high degree of polymerization and preparation method thereof

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Effect test

Embodiment 1

[0029] Shock wave synthesis of high degree of polymerization ammonium polyphosphate, the specific steps are as follows:

[0030] (1) Drying of raw materials: The ammonium polyphosphate powder with a degree of polymerization of 10 is dried in an infrared oven.

[0031] (2) Dry pressing: pass the dried ammonium phosphate powder with a low degree of polymerization through a steel mold, and press it under a pressure of 10 MPa to form a cylindrical blank film.

[0032] (3) Synthetic cavity assembly (for the device see figure 1 ): put the blank mold 9 together with the pyrophyllite mold 8 into the bottom of the cavity 3, put the pressure transmission backing plate 5 on the blank mold 9, cover the partition plate 4 and the parallel flying pieces 7, and fill the cavity 3 with explosives, Explosive filling quantity is 1kg, covers cover plate 10 and tightens screw 2, loads onto electric detonator 1.

[0033] (4) Shock wave synthesis: connect the power supply at both ends of the electr...

Embodiment 2

[0039] Shock wave synthesis of high degree of polymerization ammonium polyphosphate, the specific steps are as follows:

[0040] (1) Raw material drying: the ammonium polyphosphate powder with a degree of polymerization of 10 is dried in a vacuum oven.

[0041] (2) Dry pressing: pass the dried ammonium phosphate powder with a low degree of polymerization through a steel mold, and press it under a pressure of 20 MPa to form a square blank film.

[0042] (3) Synthetic cavity assembly (for the device see figure 1 ): put the blank mold 9 together with the pyrophyllite mold 8 into the bottom of the cavity 3, put the pressure transmission backing plate 5 on the blank mold 9, cover the partition plate 4 and the parallel flying pieces 7, and fill the cavity 3 with explosives, Explosive filling quantity is 5kg, covers cover plate 10 and tightens screw 2, loads onto electric detonator 1.

[0043] (4) Shock wave synthesis: connect the power supply at both ends of the electric detonator...

Embodiment 3

[0049] Shock wave synthesis of high degree of polymerization ammonium polyphosphate, the specific steps are as follows:

[0050] (1) Drying of raw materials: The ammonium polyphosphate powder with a degree of polymerization of 50 is dried in an ordinary oven.

[0051] (2) Dry pressing: pass the dried ammonium phosphate powder with a low degree of polymerization through a steel mold, and press it under a pressure of 20 MPa to form a cuboid blank film.

[0052] (3) Synthetic cavity assembly (for the device see figure 1 ): put the blank mold 9 together with the pyrophyllite mold 8 into the bottom of the cavity 3, put the pressure transmission backing plate 5 on the blank mold 9, cover the partition plate 4 and the parallel flying pieces 7, and fill the cavity 3 with explosives, Explosive filling quantity is 5kg, covers cover plate 10 and tightens screw 2, loads onto electric detonator 1.

[0053] (4) Shock wave synthesis: connect the power supply at both ends of the electric de...

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Abstract

The invention discloses a high degree of polymerization ammonium polyphosphate and a preparation method thereof. The method of the invention is to use ammonium polyphosphate with low degree of polymerization as raw material, and synthesize ammonium polyphosphate with high degree of polymerization through shock wave and high pressure. The method of the present invention uses cheap ammonium polyphosphate with a low degree of polymerization on the current market as raw material, which saves the process link for the preparation of ammonium polyphosphate with a low degree of polymerization in the early stage. The high-polymerization ammonium polyphosphate has high product value, and at the same time, the process principle of the method is simple and the process is simple, so it has a good market prospect.

Description

technical field [0001] The invention relates to a preparation method of ammonium polyphosphate, in particular to an ammonium polyphosphate with a high degree of polymerization and a preparation method thereof. Background technique [0002] Ammonium polyphosphate (APP) is a phosphorus-based halogen-free flame retardant with a white powder appearance. It has good stability, flame retardant effect and environmental friendliness. It is widely used in electronics, electrical appliances and automobiles. and other fields. [0003] For ammonium polyphosphate, the degree of polymerization (n) has a great influence on its physical and chemical properties. As n increases, the stability of ammonium polyphosphate is better and the flame retardant effect is better. [0004] The continuous development of the APP industry has higher and higher requirements for the degree of polymerization of APP. It has developed rapidly in recent years, but the enterprises are scattered and the scale of a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B25/40
Inventor 卢喜瑞舒小艳袁世斌匙芳廷涂鸿
Owner SOUTHWEAT UNIV OF SCI & TECH
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