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Separation and recovery method of tnt component in waste ladder black aluminum explosive

A technology for separation and recovery of black aluminum, applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., can solve problems such as hidden safety hazards, low recovery efficiency of TNT components, and low TNT purity, and improve safety. The effect of improving the efficiency of recovery, improving the filtration rate and improving the filtration rate

Active Publication Date: 2015-11-04
PEOPLES LIBERATION ARMY ORDNANCE ENG COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for separation and recovery of TNT components in waste ladder black aluminum explosives with safer separation process, higher separation efficiency, and better purity of the separated components, so as to solve the problem of using the existing melting method for ladder black aluminum There are safety hazards in the recovery of TNT components in explosives, low recovery efficiency of TNT components and low purity of recovered TNT

Method used

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  • Separation and recovery method of tnt component in waste ladder black aluminum explosive
  • Separation and recovery method of tnt component in waste ladder black aluminum explosive
  • Separation and recovery method of tnt component in waste ladder black aluminum explosive

Examples

Experimental program
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Effect test

Embodiment 1

[0025] 1) Reagents and instruments:

[0026] Discarded black aluminum explosives: TNT, RDX, and aluminum powder in a mass ratio of 45:35:19, with no change in stability; acetone: analytically pure, Tianjin Hengxing Chemical Reagent Co., Ltd.; TNT: analytically pure.

[0027] Differential scanning calorimeter, DSC-31 produced by French SETRAM company; constant temperature water bath, syc type intelligent super constant temperature water tank produced by Gongyi Yuhua Instrument Company; multi-purpose vacuum pump for circulating water, SHB-3 produced by Zhengzhou Duyu Instrument Factory type; gas chromatograph, American Hewlett-Packard 5890Ⅱ type; electronic balance, division value 0.0001g; ZK35 type vacuum drying oven, Tianjin Huabei Experimental Instrument Co., Ltd.; qualitative filter paper: fast filter paper, pore size is 80~120μm; test tube, glass rod And enamel cups and so on.

[0028] 2) Experimental process:

[0029] 2.1) Wetly pulverize a small amount of block-shaped w...

Embodiment 2

[0033] Embodiment 2: gas chromatography analysis

[0034] In order to check the efficiency of the separation of ladder black aluminum mixed explosives in Example 1, and the purity of the recovered TNT, a gas chromatograph was used to detect the TNT content of the separated TNT and the remaining RDX and aluminum powder mixture.

[0035] Weigh about 0.2g of analytically pure TNT, accurate to 0.0001g, put it into a 100ml volumetric flask, add acetone to the mark and shake well, then pipette different volumes of TNT solution and put them into five 10ml volumetric flasks , prepare standard TNT solutions with concentrations of 0.6mg / ml, 0.8mg / ml, 1.0mg / ml, 1.2mg / mg, and 1.4mg / ml respectively for use.

[0036] Weigh 0.08g of TNT prepared in Example 1, accurate to 0.0001g, put it into a 100ml volumetric flask, add acetone to the scale and shake it up, and set aside; Weigh the mixed filter residue 1.0 of the RDX and aluminum powder recovered in Example 1 g, accurate to 0.0001g, put it...

Embodiment 3

[0044] Example 3: Thermal Analysis

[0045] Thermal analysis was carried out on the mixed filter residue of the original sample (i.e., the waste ladder black aluminum explosive), the TNT recovered in Example 1, and the recovered RDX and aluminum powder by using a differential scanning calorimeter.

[0046] The heating furnace should be preheated for about half an hour before the measurement, the atmosphere is nitrogen, 50ml / min, the crucible is a standard 40ul aluminum crucible, and the standard substance is indium.

[0047] Recovered TNT 1.69mg, starting temperature 30°C, ending temperature 100°C, heating rate 10°C / min; original sample 0.7mg, starting temperature 60°C, ending temperature 250°C, heating rate 10°C / min; recovered RDX The mixed filter residue with aluminum powder is 1.22mg, the starting temperature is 60°C, the ending temperature is 250°C, and the heating rate is 10°C / min.

[0048] The DSC phase diagram obtained by thermal analysis of recovered TNT is shown in ...

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Abstract

The invention discloses a method for separating and recycling a TNT (Trinitrotoluene) component in waste hexolite aluminum explosive. The method comprises the following steps: a) filtering a mixture of waste hexolite aluminum explosive powder and hot water of 85-90 DEG C in a vacuum suction filtration device, and recycling the obtained filtrate after filtration; b) cooling down the filtrate in the vacuum suction filtration device, filtering, recycling the filtered residue after the filtration, drying the filtered residue in a safe drying oven of 60-70 DEG C, so as to obtain the recycled TNT, wherein the aperture of the filtering medium used in the vacuum suction filtration device used in the step a) and the step b) is 80-120 Mum. The method takes water as a heating medium, and at the same time pressure difference filtration is adopted, so that the security and the recycling efficiency of separated components are remarkably improved in the separation process, the recycling rate is as high as 76.2%, and moreover tests show that the purity of the recycled TNT is 94.83%, that is, the purity is higher than the purity of the TNT obtained by using the conventional method.

Description

technical field [0001] The invention relates to a method for separating and recovering useful components in waste explosives, in particular to a method for separating and recovering TNT components in waste black aluminum explosives. Background technique [0002] Explosives have been more and more widely used in various sectors of the national economy because of their low cost, manpower saving, and the ability to speed up engineering construction, as well as the characteristics of working in special environments. Explosives can be used in the military as explosive charges for ammunition such as artillery shells, aerial bombs, missiles, mines, torpedoes, and grenades, and can also be used in military blasting and detonating devices for nuclear bombs. It is widely used in mining, road construction, water conservancy construction, engineering blasting, metal processing, etc., and also widely used in scientific and technological fields such as seismic exploration. Now in our cou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C205/06C07C201/16
Inventor 丁玉奎刘国庆甄建伟吴翼李金明可勇王国栋高兴勇张玉令
Owner PEOPLES LIBERATION ARMY ORDNANCE ENG COLLEGE