Industrial storage-resistant, anti-caking fine ammonium perchlorate and preparation method thereof

An ammonium perchlorate and anti-caking technology, which is applied in the direction of ammonium perchlorate composition, offensive equipment, non-explosive/non-thermal agent components, etc., can solve the problem of small crushing amount, short storage period, and impact on propellant performance Larger problems, to achieve the convenience of industrial production, reduce production costs, and improve the effect of storage resistance

Inactive Publication Date: 2019-01-18
SHANGHAI AEROSPACE CHEM ENG INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many kinds of fine AP modifiers commonly used, such as: anti-coalescence agent compounded with octadecylamine and sodium dodecylbenzenesulfonate, NC solution and coupling agent coating modifier, surfactant modifier However, the above-mentioned modifiers have disadvantages such as great impact on propellant performance, short storage life, or unsuitability for industrial production.
[0004] Shanghai Aerospace Chemical Application Research Institute and Nanjing University of Science and Technology jointly developed an anti-caking agent for fine ammonium perchlorate, which can be used in solid propellants , but the crushing amount of 10kg / time is small, which cannot meet the growing demand for the production of fine ammonium perchlorate

Method used

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  • Industrial storage-resistant, anti-caking fine ammonium perchlorate and preparation method thereof
  • Industrial storage-resistant, anti-caking fine ammonium perchlorate and preparation method thereof
  • Industrial storage-resistant, anti-caking fine ammonium perchlorate and preparation method thereof

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preparation example Construction

[0022] The industrialized storage-resistant and anti-caking fine ammonium perchlorate preparation method of the present invention comprises: anti-caking agent is mixed in ammonium perchlorate coarse material, and the addition amount of described anti-caking agent is the mass of ammonium perchlorate coarse material 0.5% to 2% of 0.5% to 2%; crushed by a jet mill to obtain storable and anti-caking fine ammonium perchlorate; the anti-caking agent is a mixture of nano-oxides, aziridine compounds and ester plasticizers , the proportion of each component is: the mass of nano-oxide is 100 parts, the mass of aziridine compound is 40-80 parts, and the mass of ester plasticizer is 40-80 parts. The particle size of the ammonium perchlorate coarse material is 100-140 mesh.

[0023] During the jet milling process, by controlling the crushing pressure at 0.4MPa-0.7MPa and the feed pressure at 0.1MPa-0.4MPa, it can achieve storage resistance and anti-coagulation of different particle sizes (...

Embodiment 1

[0031] In this embodiment, the anti-caking agent is a mixture of nano-alumina, tris(-2methylaziridine-1) phosphorus oxide and butyl phthalate, and the specific ratio is that the quality of nano-alumina is 100 The mass of tris(-2methylaziridine-1)phosphorus oxide is 80 parts, and the mass of butyl phthalate is 40 parts.

Embodiment 2

[0033] In this example, 1.5% by mass of the anti-caking agent prepared in Example 1 was added to the ammonium perchlorate coarse material, mixed evenly, added to the jet mill, and crushed by controlling the crushing pressure and feeding pressure to obtain fine ammonium perchlorate.

[0034] Table 1 compares the storage effects of the industrialized fine ammonium perchlorate of the prior art and the storability and anti-caking fine ammonium perchlorate prepared in this example.

[0035] Table 1 Comparison before and after modification of fine ammonium perchlorate

[0036]

[0037] Note: The modified fine ammonium perchlorate is packaged in a double-layer polyethylene plastic bag with a built-in silicone belt.

[0038] It can be seen from Table 1 that the particle size of the industrialized fine ammonium perchlorate of the prior art is nearly doubled after being stored for half a month, and has been agglomerated after being stored for 1 month, so particle size testing and appl...

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Abstract

The invention relates to an industrial storage-resistant, anti-caking fine ammonium perchlorate and a preparation method thereof. The preparation method comprises the steps: mixing an anti-caking agent in an ammonium perchlorate crude material, wherein the anti-caking agent is added in an amount of 0.5-2% of the mass of the ammonium perchlorate crude material; pulverizeing the material by a jet mill to obtain the storage-resistant, anti-caking fine ammonium perchlorate, wherein the anti-caking agent is a mixture of nano-oxide, aziridine compounds and ester plasticizers, the ratio of each component is that: the mass of the nano-oxide is 100 parts, the mass of the aziridine compound is 40-80 parts, and the mass of the ester plasticizer is 40-80 parts. The method improves the storage-resistant and anti-caking property of fine ammonium perchlorate.

Description

technical field [0001] The invention relates to the preparation technology of fine ammonium perchlorate, in particular to an industrialized storage-resistant and anti-caking fine ammonium perchlorate and a preparation method thereof. Background technique [0002] Ammonium perchlorate (hereinafter referred to as AP) is one of the most commonly used oxidants in the field of solid propellants, and is also a commonly used secondary oxidizer for automotive airbags and gas generating agents. AP has strong hygroscopicity, and it is easy to absorb moisture in the air to cause partial dissolution, and then recrystallize in a drier environment, resulting in a "crystal bridge" phenomenon and agglomeration into agglomerates. After agglomeration, the particle size of AP will change, seriously It affects the usability of ammonium perchlorate and the final combustion performance of the product. Especially for fine AP, its hygroscopicity and agglomeration are more serious. After a few days...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C06B23/00C06B29/22
CPCC06B23/009C06B29/22
Inventor 仉玉成俞成蛟张秀艳宋洪昌沈坚孙庆锋沈伟民刘爱琴邱磊何晓华
Owner SHANGHAI AEROSPACE CHEM ENG INST
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