12results about "Nitrated aromatic explosive compositions" patented technology

The invention provides a DFDNTN / TNAZ eutectic substance and a preparation method thereof, DFDNTN and TNAZ are weighed in proportion in an alumina crucible of DSC (Differential Scanning Calorimetry) according to the total amount of 5mg, a test is carried out under the conditions that nitrogen is used as an atmosphere and the heating rate is 10k / min in DSC thermal analysis, the temperature is raised to 150 DEG C which is higher than the melting point of any single component, and one sample is circulated for three times, so that the samples can be uniformly mixed. DSC curves of different heating rates are obtained. When the ratio of DFDNTN to TNAZ is 4: 6, the melting point is 88 DEG C. According to the method, the eutectic point can be quickly found by using a trace amount of samples, and the eutectic substance and the high-energy component (RDX) are mixed by adopting a micro-heat thermal instrument, so that the thermal behavior between the eutectic substance and the high-energy component is researched. The melting point of the eutectoid prepared by the invention is reduced, so that the energy characteristic, the mechanical sensitivity and the decomposition temperature of the eutectoid are between those of two single components, and the volatility of TNAZ can be effectively relieved.

The present application relates to a kind of stable preparation method of type II basic lead stephanate, belong to detonating explosive, firing charge, pyrotechnics, energetic material technical field.The method described in the present application is prepared by changing reaction raw materials, optimizing synthesis process and hydrothermal reaction, to obtain type II B-LTNR product.The method avoids the generation of type I acicular B-LTNR, not only improves the physical and chemical stability of B-LTNR, reduces mechanical sensitivity, but also significantly improves its dispersibility, mixing and packing density and other application performance.Using the method can ensure the quality and application reliability of the obtained type II B-LTNR product, the obtained product has good flowability, good crystal shape consistency, high yield and other characteristics, and the process is simple and easy to operate, high safety, suitable for industrial production, has good application prospect in detonating explosive, firing charge, pyrotechnics, energetic material and other related technical fields.

The application discloses a method for preparing spherical TATB-based explosives based on super-hydrophobic effect, which comprises the following steps: adding TATB into a molten binder, stirring, and gradually reducing the temperature to solidify the mixture to obtain a TATB-binder mixture; cutting the TATB-binder mixture into a desired size, placing the mixture on a super-hydrophobic anti-sticking release agent surface, heating the mixture in a water bath to melt the TATB-binder mixture, using the super-hydrophobic interface effect to spontaneously gather the molten material into spherical particles with uniform particle size, and gradually reducing the temperature to completely solidify the spherical particles; and filtering, washing and drying the solidified product to obtain spherical TATB-based explosives. The process flow is simple, the preparation cost is low, the particle size of the product can be accurately controlled within 400-2000 microns, the flowability is excellent, the crystal form and thermal decomposition performance of each component in the system are stable, the compatibility of TATB and the binder is excellent, and an energetic binder can be selected to effectively avoid the energy reduction of the explosive system, thereby providing a new technical path for the engineering application of spherical TATB-based explosives.

The invention discloses a method for high and low temperature gradient dissolution of hydrogen-bond-rich explosives, and belongs to the field of TATB application. The method sequentially comprises the following steps: preparing a tetrabutylammonium fluoride / aqueous solution, namely a deep eutectic solvent A, with the molar ratio of 10: 0.5-10: 1.5; the method comprises the following steps: adding excessive TATB powder into a deep-eutectic solvent A, stirring at room temperature, and heating to the boiling point of water in stages; and measuring the TATB content at each section of temperature, and converting the TATB content into the solubility of the TATB at different temperatures. According to the method provided by the invention, gradient dissolution of the TATB at high and low temperatures can be realized, the solubility of the TATB at the high temperature is more than two times that of the TATB at the low temperature, the high and low temperature solubility difference (delta S) reaches 70mg / mL, a solvent solution can be provided for cooling recrystallization of the TATB, and the method has important application value in weapon systems. In addition, the invention further discloses application of the method for high and low temperature gradient dissolution of the hydrogen-bond-rich explosive in a weapon system.

The invention relates to a preparation method of polycrystalline diamond particles with high recovery rate, which comprises the following steps: preparing a main grain: uniformly mixing an explosive and graphite, putting the mixture into a cylindrical mold with the bottom diameter of 20-40mm, increasing the pressure to 80-100MPa at the rate of 8-10MPa / min and maintaining the pressure for 3-5 minutes, increasing the pressure to 200-220MPa at the rate of 2-5MPa / min and maintaining the pressure for 20-30 minutes, and then adding the main grain into the cylindrical mold to obtain the main grain; the ratio of the height to the diameter of the pressed main grain is 1.0-1.5, and the density of the main grain is 1.50-1.52 g / cm < 3 >. In the prior art, the density of the main grain should be optimized within the range of 1.60-1.65 g / cm < 3 >, but the final recovery rate of the diamond particles can be increased to 11-13% when the density of the main grain is within the low range of 1.50-1.52 g / cm < 3 >.

The invention relates to a nitrating mixture for the nitration of 2,4- and 2,6-dinitrotoluene to 2,4,6-trinitrotoluene containing from 5 to 20 wt. % of nitric oxide (V), from 60 to 80 wt. % of nitric acid (V) and from 5 to 30 wt. % sulfuric acid (VI). The invention further relates to a process for obtaining of 2,4,6-trinitrotoluene comprising contacting 2,4- and 2,6-dinitrotoluene with the nitrating mixture according to the invention and heating the resulting reaction mixture, characterized in that the mass ratio of the nitrating mixture to 2,4- and 2,6-dinitrotoluene is not greater than 10:1.

The invention discloses a preparation method of a low-chlorine TATB crystal with a uniform pore structure, which comprises the following steps: dissolving crude TCTNB in toluene, and filtering to remove toluene insoluble substances to obtain a TCTNB solution; introducing nitrogen to discharge air in the reactor, transferring the TCTNB solution into the reactor, adding deionized water, sealing and heating, then introducing ammonia gas for reaction, cooling to room temperature after the reaction is completed, and filtering to obtain crude TATB; adding the crude TATB into hot water, and carrying out ultrasonic dispersion to obtain a suspension; and carrying out ultrasonic-assisted boiling washing on the suspension, filtering, alternately washing with acetone and hot water, and drying to obtain the low-chlorine TATB crystal with a uniform pore structure. The pore size of the TATB crystal obtained by the preparation method provided by the invention is concentrated in the range of 60-100 nm, the position distribution is uniform, and the chlorine content is less than or equal to 0.35%. The method is simple in technological process, mild in condition and suitable for industrial preparation of high-quality insensitive explosives for nuclear weapons and conventional weapons, and has both safety and magnification.

Pyrotechnic mixture with potassium benzanate, said pyrotechnic mixture comprising a binary or ternary intermixture comprising at least two selected from potassium benzanate, copper picramate and potassium picrate.

This invention discloses a method for synthesizing a class of energetic compounds of 3-(3,5-dinitrophenyl)-1,2,4-oxadiazole. The structural feature of these compounds is a 3-(3,5-dinitrophenyl)-1,2,4-oxadiazole ring as the basic skeleton, with trifluoromethyl, trichloromethyl, amino, methylazido, and methyl hydroxyl groups as substituents. This invention belongs to the field of energetic materials technology. The 5-trifluoromethyl-3-(3,5-dinitrophenyl)-1,2,4-oxadiazole and 5-methylazido-3-(3,5-dinitrophenyl)-1,2,4-oxadiazole described in this invention possess low melting points and low sensitivity, showing promising applications in cast-supported explosives.

The invention relates to a nitrating mixture for the nitration of 2,4- and 2,6-dinitrotoluene to 2,4,6-trinitrotoluene containing from 5 to 20 wt. % of nitric oxide (V), from 60 to 80 wt. % of nitric acid (V) and from 5 to 30 wt. % sulfuric acid (VI). The invention further relates to a process for obtaining of 2,4,6-trinitrotoluene comprising contacting 2,4- and 2,6-dinitrotoluene with the nitrating mixture according to the invention and heating the resulting reaction mixture, characterized in that the mass ratio of the nitrating mixture to 2,4- and 2,6-dinitrotoluene is not greater than 10:1.

The invention provides a blocky hexanitrostilbene crystal, a preparation method and application, the method comprises the following steps: step 1, adding a formula amount of HNS crude product into a good solvent, heating, stirring and dissolving to obtain a mixed solution; step 2, dropwise adding an anti-solvent into the mixed solution, cooling and filtering to obtain a solid B; and step 3, adding the solid B into an erosion solvent, heating, stirring, filtering, washing and drying to obtain the corrosion inhibitor, the mass ratio of the HNS crude product to the good solvent to the anti-solvent to the erosion solvent is 1: (15-30): (20-60): (5-15). According to the method disclosed by the invention, the hexanitrostilbene crystal with the high-quality blocky morphology is prepared by adopting a method of coupling solventing-out non-solvent crystallization with solvent erosion, the preparation method is simple, and the prepared HNS crystal is high in crystallinity, regular in morphology, smooth in surface, small in length-diameter ratio, good in product uniformity and high in quality.