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Method for preparing lead carbonate combustion catalyst used for solid propellant

A technology of burning catalysts and solid propellants, which can be used in the production of lead carbonate, compressed gas, and offensive equipment. It can solve the problems of wide particle size distribution of finished powder, troubles in industrialization, and high supersaturation, and achieve narrow particle size distribution. , easy large-scale production, high sintering activity effect

Active Publication Date: 2013-05-29
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the direct precipitation method is generally used in the industry to prepare ultra-fine lead carbonate powder. During the preparation process, this process is easy to cause high local supersaturation, which makes the particle size distribution of the finished powder wider, so the direct precipitation method is used. The prepared lead carbonate has limited effect when used as a combustion catalyst
Although lead carbonate with good dispersibility can be obtained by adding non-ionic surfactant, the foam that occurs during the preparation process is still a problem that plagues its industrialization

Method used

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  • Method for preparing lead carbonate combustion catalyst used for solid propellant
  • Method for preparing lead carbonate combustion catalyst used for solid propellant

Examples

Experimental program
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Effect test

Embodiment 1

[0020] This embodiment includes the following steps:

[0021] Step 1: Take a certain amount of Pb(NO 3 ) 2 The powder is added to the ethylene glycol solution to obtain a solution;

[0022] Step 2: adjusting the concentration of lead ions in the solution obtained in Step 1 to 0.1mol / L, and then stirring the solution for 1 hour;

[0023] Step 3: adding a certain volume of the solution in step 2 to the inner lining of the autoclave, and the volume of the solution reaches 70% of the volume of the inner lining of the autoclave;

[0024] Step 4: Place the lining of the reaction kettle equipped with the reaction materials in step 3 in a high-pressure reaction kettle, seal the reaction kettle, heat it at 200°C for 8 hours for solvent heat treatment, and then lower it to room temperature;

[0025] Step 5: taking out the reactant from the autoclave, filtering and washing with deionized water and absolute ethanol in sequence, and drying at 80°C for 12 hours to obtain lead carbonate ...

Embodiment 2

[0027] This embodiment includes the following steps:

[0028] Step 1: Take a certain amount of Pb(NO 3 ) 2 Powder, added to ethylene glycol methyl ether solution to obtain Pb(NO 3 ) 2 organic solution;

[0029] Step 2: adjusting the concentration of lead ions in the solution obtained in Step 1 to 0.3mol / L, and then stirring the solution for 3 hours;

[0030] Step 3: adding a certain volume of the solution in step 2 into the inner lining of the autoclave, and the volume of the solution reaches 60% of the volume of the inner lining of the autoclave;

[0031] Step 4: Place the lining of the reactor with the reaction materials in Step 3 in a high-pressure reactor, seal the reactor, heat it at 150°C for 10 hours for solvent heat treatment, and then lower it to room temperature;

[0032] Step 5: taking out the reactants from the autoclave, filtering and washing with deionized water and absolute ethanol in sequence, and drying at 600°C for 10 hours to obtain lead carbonate powd...

example 3

[0034] This embodiment includes the following steps:

[0035] Step 1: Weigh a certain amount of PbO powder and add it to the ethylene glycol methyl ether solution to obtain an organic solution of PbO;

[0036] Step 2: Adjust the concentration of lead ions in the solution obtained in Step 1 to 1 mol / L, and stir the solution for 2 hours.

[0037] Step 3: adding a certain volume of the solution in step 2 into the inner lining of the autoclave, and the volume of the solution reaches 80% of the volume of the inner lining of the autoclave;

[0038] Step 4: Place the lining of the reaction kettle equipped with the reaction materials in step 3 in a high-pressure reaction kettle, seal the reaction kettle, heat it at 180oC for 16 hours for solvent heat treatment, and then lower it to room temperature;

[0039] Step 5: Take out the reactants from the autoclave, filter and wash with deionized water and absolute ethanol in sequence, and dry at 180°C for 16 hours to obtain lead carbonate p...

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Abstract

The invention relates to a method for preparing a lead carbonate combustion catalyst used for a solid propellant, comprising the following steps of: (1) weighing lead-based oxide, and adding the lead-based oxide into an organic solvent to obtain a lead-based oxide solution; (2) regulating the concentration of lead ions in the obtained solution to be 0.1-1mol / L, and stirring; adding the solution obtained in the step (2) into a high pressure reaction kettle, insulating for 2-32 hours at the temperature of 150-240 DEG C, carrying out solvent heat treatment, and then cooling to room temperature; and taking out a reactant, cleaning with deionized water and absolute ethyl alcohol sequentially after filtering, and stoving for 6-12 hours at the temperature of 60-100 DEG C to obtain lead carbonatepowder. In the invention, a solvent hot method is adopted to prepare the lead carbonate powder, and the lead-based oxide is directly dissolved into an organic solvent to carry out a hydro-thermal reaction. The technological process in the invention is simple, is easy to control, produces no pollution, has low cost and is easy for mass production.

Description

technical field [0001] The invention relates to the field of inorganic synthesis, in particular to a method for preparing a lead carbonate combustion catalyst for a solid propellant. Background technique [0002] There are many kinds of combustion catalysts, and the commonly used ones can be classified into three categories: inorganic metal compounds, such as lead carbonate (hereinafter expressed as PbCO 3 ), CuO, PbO, and copper chromite (a mixture of copper oxide and chromium oxide); organometallic compounds such as lead salicylate, lead benzoate, copper adipate, and high-boiling ferrocene derivatives, such as catoxin . Although there are many types, inorganic metal compounds are often used in practical formulations. [0003] PbCO2 3 It is an important kind of combustion catalyst, and its superior performance makes it occupy a pivotal position in similar catalysts. Due to the good catalytic properties of lead compounds in solid propellants, they have been used as burni...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G21/14C06D5/00
Inventor 朱孔军孟庆华裘进浩季宏丽
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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