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Preparation method of lead carbonate combustion catalyst for solid propellant

A technology of burning catalysts and solid propellants, applied in the direction of lead carbonate, offensive equipment, compressed gas generation, etc., can solve the problems of wide particle size distribution of finished powder, troubles in industrialization, high supersaturation, etc., and achieve good crystallinity, Ease of large-scale production, good dispersion of powder particles

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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  • Preparation method of lead carbonate combustion catalyst for solid propellant
  • Preparation method of lead carbonate combustion catalyst for solid propellant

Examples

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example 1

[0022] This embodiment includes the following steps:

[0023] Step 1: Weigh a certain amount of lead acetate, zirconium nitrate and tetrabutyl titanate and dissolve them in ethylene glycol to form Pb 2+ 、Zr 4+ 、Ti 4+ Precursor monomers with respective concentrations of 1.0mol / L, 0.5mol / L, and 1.0mol / L;

[0024] Step 2: Then on Ti 4+ Add a certain amount of acetylacetone to the precursor monomer solution, so that the concentration of acetylacetone is 2.0mol / L;

[0025] Step 3: According to the PbZr to be synthesized 0.52 Ti 0.48 o 3 The stoichiometric ratio of the sol takes a certain amount of the three precursor monomer solutions obtained in step 1 and step 2 and mixes them evenly, so that the concentration of the obtained PZT precursor is 0.3mol / L;

[0026] Step 4: Add a certain amount of acetic acid to the PZT precursor obtained in Step 3 to adjust its pH to 3, and stir the solution for 3 hours to form a PZT sol;

[0027] Step 5: Weigh 50ml of sol and add it to the ...

example 2

[0030] This embodiment includes the following steps:

[0031] Step 1: Weigh a certain amount of lead oxide, zirconium oxychloride and titanium oxide and dissolve them in ethylene glycol methyl ether to form Pb 2+ 、Zr 4+ 、Ti 4+ Precursor monomers with respective concentrations of 1.0mol / L, 0.5mol / L, and 1.0mol / L;

[0032] Step 2: Then on Ti 4+ Add a certain amount of acetylacetone to the precursor monomer solution, so that the concentration of acetylacetone is 2.5mol / L;

[0033] Step 3: According to the PbZr to be synthesized 0.52 Ti 0.48 o 3 The stoichiometric ratio of the sol takes a certain amount of the three precursor monomer solutions obtained in step 1 and step 2 and mixes them evenly so that the concentration of the PZT precursor is 0.3mol / L;

[0034]Step 4: Add a certain amount of acetic acid to the PZT precursor obtained in Step 3 to adjust its pH to 3, and stir the solution for 2 hours to form a PZT sol;

[0035] Step 5: Take 50ml of the sol obtained in step...

Embodiment 3

[0038] This embodiment includes the following steps:

[0039] Step 1: Take a certain amount of lead nitrate, zirconium chloride and titanium chloride respectively and dissolve them in ethylene glycol ether to form Pb 2+ 、Zr 4+ 、Ti 4+ Precursor monomers whose respective concentrations are 1.2mol / L, 0.6mol / L, and 1.0mol / L;

[0040] Step 2: Then in Ti 4+ Add a certain amount of acetylacetone to the precursor monomer solution, so that the concentration of acetylacetone is 2.0mol / L;

[0041] Step 3: According to the PbZr to be synthesized 0.52 Ti 0.48 o 3 The stoichiometric ratio of the sol takes a certain amount of the three precursor monomer solutions obtained in step 1 and step 2 and mixes them evenly so that the concentration of the PZT precursor is 0.5mol / L;

[0042] Step 4: Add a certain amount of acetic acid to the PZT precursor obtained in Step 3 to adjust the pH of the precursor to 4, and stir the solution for 1 hour to form a PZT sol.

[0043] Step 5: Weigh 50ml ...

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Abstract

The invention relates to a preparation method of a lead carbonate combustion catalyst for a solid propellant, which comprises the main step of: directly performing a solvent heating reaction of lead zirconate titanate sol for realizing the sol-solvent heating synthesization of a lead carbonate powder body; firstly, configuring the lead zirconate titanate sol of a certain concentration according to chemical components; then, directly putting the sol into a line of a high-pressure reaction kettle; and performing the solvent heating reaction at high temperature of 120 DEG C to 240 DEG C and highpressure to obtain the lead carbonate powder body. The invention has the advantages of good product crystallization performance, stable quality, high purity, good granule dispersity of powder body, simple technological process, easy control, no pollution, low cost and easy scale 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 powder 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, lead compounds have be...

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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