Silane coupling agent coated recrystallized modified potassium chlorate and preparation method and applications thereof

A technology of silane coupling agent and potassium chlorate, which is applied in the field of oxidant and its preparation, can solve the problems of poor discharge effect and high price and cost, and achieve the effect of improving thermal safety and stability, improving friction sensitivity, reducing friction sensitivity and impact

Inactive Publication Date: 2015-06-17
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has been proposed in the prior art to modify the potassium chlorate product itself to reduce its mechanical sensitivity. In recent years, many research results have appeared to try to solve this problem, but due to the influence of various factors (or because the price cost is too high, or because The effect of firing is not good, etc.), the existing modification methods have not been widely used in this field, and its technical solutions need to be further improved

Method used

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  • Silane coupling agent coated recrystallized modified potassium chlorate and preparation method and applications thereof
  • Silane coupling agent coated recrystallized modified potassium chlorate and preparation method and applications thereof
  • Silane coupling agent coated recrystallized modified potassium chlorate and preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] a kind of like figure 1 The shown silane coupling agent coated recrystallized modified potassium chlorate, the silane coupling agent coated recrystallized modified potassium chlorate has a core-shell structure, with potassium chlorate as the core, and silane coupling agent as the raw material for coating the shell , the mass ratio of silane coupling agent to potassium chlorate is 0.15:1. The modified potassium chlorate is in the shape of spherical particles with an average particle size of 40 μm to 50 μm.

[0024] In this example, the silane coupling agent-coated recrystallization modified potassium chlorate is prepared by using a silane coupling agent as a modifier and using the recrystallization method to modify potassium chlorate, which specifically includes the following steps:

[0025] (1) Using potassium chlorate as raw material, add 90ml of distilled water into a 500ml three-neck flask, raise the temperature to 100°C, then add 50g of potassium chlorate powder, s...

Embodiment 2

[0030] a kind of like figure 2 The shown silane coupling agent coated recrystallized modified potassium chlorate, the silane coupling agent coated recrystallized modified potassium chlorate has a core-shell structure, with potassium chlorate as the core, and silane coupling agent as the raw material for coating the shell , the mass ratio of silane coupling agent to potassium chlorate is 0.1:1. The modified potassium chlorate is in the shape of spherical particles with an average particle size of 40 μm to 50 μm.

[0031] In this example, the silane coupling agent-coated recrystallization modified potassium chlorate is prepared by using a silane coupling agent as a modifier and using the recrystallization method to modify potassium chlorate, which specifically includes the following steps:

[0032] (1) Using potassium chlorate as raw material, add 90ml of distilled water into a 500ml three-neck flask, raise the temperature to 95°C, then add 50g of potassium chlorate powder, st...

Embodiment 3

[0037] A silane coupling agent coated recrystallized modified potassium chlorate, the silane coupling agent coated recrystallized modified potassium chlorate has a core-shell structure, with potassium chlorate as the core, and a silane coupling agent as the raw material for the coated shell, The mass ratio of silane coupling agent to potassium chlorate is 0.06:1. The modified potassium chlorate is in the shape of spherical particles with an average particle size of 40 μm to 50 μm.

[0038] In this example, the silane coupling agent-coated recrystallized modified potassium chlorate is prepared by using a silane coupling agent as a modifier and using the recrystallization method to modify potassium chlorate, which specifically includes the following steps:

[0039] (1) Using potassium chlorate as the raw material, add 90ml of distilled water to a 500ml three-necked flask, raise the temperature to 90°C, then add 50g of potassium chlorate powder, stir and condense and reflux for 3...

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Abstract

The invention discloses a silane coupling agent coated recrystallized modified potassium chlorate, which is of a core-shell type structure, takes potassium chlorate as an inner core, and takes a silane coupling agent as a raw material for coating a shell, and the mass ratio of the silane coupling agent to the potassium chlorate is 0.15-0.04:1. The preparation method of a potassium chlorate product disclosed by the invention comprises the following steps: preparing a saturated solution of potassium chlorate firstly; and then, adding a silane coupling agent serving as a modifier, carrying out constant-temperature stirring and condensed backflow, and after the reaction is completed, carrying out evaporative crystallization on the obtained product until the obtained object is constant in weight, thereby obtaining the silane coupling agent coated recrystallized modified potassium chlorate. The silane coupling agent coated recrystallized modified potassium chlorate can be used as an oxidant for fireworks and crackers, and can reduce the mechanical sensitivity of potassium chlorate containing pyrotechnic compositions, and increase the thermal security and stability of potassium chlorate containing pyrotechnic compositions.

Description

technical field [0001] The invention relates to an oxidizing agent and its preparation, in particular to a modified potassium chlorate oxidizing agent, its preparation and its application in the field of fireworks and firecrackers. Background technique [0002] Potassium chlorate is an important raw material in fireworks and other pyrotechnic agents. Potassium chlorate is a strong oxidizing agent. Many domestic scholars have pointed out that potassium chlorate has an effective oxygen content of 39% and releases oxygen at 352°C. It has the characteristics of low decomposition temperature, low hygroscopicity, good explosive performance, good storage stability, simple production process, and low cost. However, when potassium chloride is mixed or contacted with reducing agents and combustibles (such as sulfur, phosphorus, ammonium compounds, metal powders, etc.), the resulting potassium chlorate-containing pyrotechnic agent has extremely high mechanical sensitivity to friction ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C06B29/02
Inventor 成茵周伟伟刘其城吴钟晴杨现锋
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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