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A kind of magnesium salicylate compound and preparation method thereof

A technology of magnesium salicylate and compounds, which is applied in the preparation of organic compounds, carboxylate salts, carboxylate salts, etc., can solve problems that are not conducive to missile guidance, stealth, and hazards, achieve excellent catalytic effects, and reduce fuel consumption. Speed ​​pressure index, the effect of increasing the burning rate

Active Publication Date: 2017-03-08
XIAN MODERN CHEM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Although lead compounds are extremely important combustion catalysts for solid propellants, the toxicity of lead compounds has attracted widespread attention as countries around the world increasingly pay attention to environmental protection and the prevention of ecological pollution. Leaving direct or potential hazards to the staff and the environment in links such as rocket engine exhaust
In addition, the lead oxide produced by the combustion and decomposition of lead salts or the lead oxide directly added to the formula will be white or light blue (cyan) smoke in the engine exhaust, which is not conducive to the guidance and stealth of the missile

Method used

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  • A kind of magnesium salicylate compound and preparation method thereof
  • A kind of magnesium salicylate compound and preparation method thereof
  • A kind of magnesium salicylate compound and preparation method thereof

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Experimental program
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Embodiment 1

[0018] The preparation of embodiment 1 magnesium salicylate compound

[0019] (1) Weigh 41.4g (0.3mol) of salicylic acid, disperse it in 300mL deionized water, adjust the pH value of the solution to 9 with sodium hydroxide solution; Dissolve in water to form a solution, add to the above solution, stir and mix evenly;

[0020] (2) Stir and react for 2 hours at a constant temperature of 70°C, then cool and stand still;

[0021] (3) The precipitate was washed several times with deionized water, filtered and dried to obtain 40.2 g of white magnesium salicylate compound with a yield of 62.6%.

[0022] Characterization of Magnesium Salicylate Compounds

[0023] 1. Infrared spectrum (KBr, cm -1 )υ: 3405, 3061, 1606, 1581, 1547, 1472, 1458, 1408, 1242, 1149, 1040.

[0024] 2. Analysis of organic elements

[0025] Molecular formula: C 7 h 4 o 3 Mg·3H 2 o

[0026] Theoretical value (%): C 39.20, H 4.70.

[0027] Measured value (%): C 39.00, H 4.51.

[0028] 3. X-ray fluoresc...

Embodiment 2

[0032] The preparation of embodiment 2 magnesium salicylate compound

[0033] (1) Weigh 1.38g (0.01mol) of salicylic acid, disperse it in 10mL of deionized water, adjust the pH value of the solution to 9 with sodium hydroxide solution; weigh 3.07g (0.012mol) of magnesium nitrate with 10mL of deionized water Dissolved and configured into a solution, added to the above solution, stirred and mixed evenly;

[0034] (2) Stir and react for 2 hours at a constant temperature of 70°C, then cool and stand still;

[0035] (3) The precipitate was washed with deionized water several times, filtered and dried to obtain 1.09 g of white magnesium salicylate compound with a yield of 50.9%.

[0036] Analysis of Solid Phase Decomposition Products of Magnesium Salicylate Compound

[0037] Place magnesium salicylate trihydrate in a crucible and calcinate at 500°C for 1 hour to obtain a white powder. X-ray diffraction showed that (as figure 1 ), the five diffraction peaks 36.92, 42.86, 62.24, 7...

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Abstract

The invention discloses a magnesium salicylate compound which has a structural formula as shown in (I). When being used as a combustion catalyst, the magnesium salicylate compound can be decomposed to generate new-born magnesium oxide which is uniformly distributed and is used as a main catalytic active ingredient. The magnesium salicylate compound has an excellent catalytic effect on combustion of double-base system solid propellants, and can be used for remarkably improving the combustion speed of a propellant and reducing the burning rate pressure exponent.

Description

technical field [0001] The invention relates to a magnesium salicylate compound which can be used as a combustion catalyst for solid propellants. [0002] technical background [0003] Double-base propellants and modified double-base propellants are a class of high-energy fuels used in rockets and missiles. The disadvantages of double-base propellants are low burning rate and high burning rate pressure index. In actual use, combustion catalysts need to be added to adjust the combustion performance. The common method is to add lead compounds as combustion catalysts, which can not only improve Speed ​​and reduce the pressure index, but also can produce "platform combustion" or "mesa combustion" and other characteristics. Studies have found that the catalytic effect of organic lead salts and lead organic complexes is far better than that of lead oxides, especially the catalytic performance of the three-way composite catalyst system composed of organic lead salts, organic copper...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C65/10C07C51/41B01J31/04
CPCB01J31/04C07C51/412C07C65/10
Inventor 赵凤起李辉安亭王伯周郝海霞郑伟罗阳高红旭宋秀铎
Owner XIAN MODERN CHEM RES INST
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