643results about "Nitrated acyclic/alicyclic/heterocyclic amine explosive compositions" patented technology

A secure authorization server computer system for verifying an identity of an end-user is provided. The computer system is programmed to receive, from a computing client, an authentication request at an authorization component. The authentication request includes a secure authentication request identifier. The computer system is also programmed to validate the authentication request at the authorization component by validating the secure authentication request identifier. The computer system is further programmed to transmit an authentication response from the authorization component to the computing client. The authentication response includes an authorization code. The authorization code represents a validation of the authentication request.

The present invention relates to energetic cocrystals, and to methods for using the same for treatment of a subterranean formation. In various embodiments, the present invention provides a method of treating a subterranean formation, the method including obtaining or providing a composition including energetic cocrystals. Each energetic cocrystal independently includes an energetic compound and a secondary material. The method also includes placing the composition in a subterranean formation.

The invention disclosed herein relates to an explosive capable of enhanced combustion efficiently capable of sustaining a high pressure over a period of time in a confined environment, such as an air tight room or a cave, where oxygen may be in limited supply. An embodiment of the present invention is a metal composite that combines a binder, a reactive metal and an oxidizer. In another embodiment, a plasticizer and a catalyst are added. In another embodiment of the present invention, a solid fuel-air explosive (SFAE) having an annular construction is used. In a typical annular construction, a cylindrical shell of SFAE surrounds the cylindrically shaped high explosive. The SFAE includes at least one of reactive metal and metal composite. In addition, the metal composite is formed from at least one reactive metal, at least one binder and an oxidizer.

Provided is a TNT replacement comprising one or more ionic liquids selected from the group of a triazolium salt, substituted triazolium salt and mixtures thereof.

The present invention relates to low-sensitivity, pressable, aluminum-containing explosive compositions and a method of producing them. The compositions comprise between 45 and 95% by weight explosive crystals, between 5 and 55% by weight passivated aluminum and a binder that is chosen such that the composition satisfies the requirements for low-sensitivity explosives (IM requirements). Due to the fact that the aluminum is passivated, the composition can be produced by the use of a well-known water slurry process.

The invention discloses energetic ion salts of 1-nitramine-2, 4-dimetridazloe and a preparation method thereof, and belongs to the technical field of energetic materials. The synthetic method is as follows: dissolving the 1-nitramine-2, 4-dimetridazloe in deionized water to obtain a pale yellow clear liquid, adding with stirring 0.5 time molar equivalent of potassium carbonate at room temperature for in-situ generation of 1-nitramine-2, 4-dimetridazloe potassium salt, then adding one time molar equivalent of ammonium chloride, hydrazine hydrochloride, guanidine hydrochloride, monoaminoguanidine hydrochloride, diaminoguanidine hydrochloride, triaminoguanidine hydrochloride and 3, 4, 5-triamino-1, 2, 4-triazole hydrochloride, stirring to precipitate a pale yellow solid precipitate, after about 1 hour of reaction, filtering the pale yellow precipitate, further recrystallizing a coarse product by use of an acetone and diethyl ether mixed solvent to obtain a pure product. The synthetic method of the invention is simple, mild in condition and high in yield, and is environmental friendly due to using of the deionized water as a solvent. The density of involved seven salts is 1.70-1.93g cm<-3>, the detonation velocity calculated by EXPLO software is between 8370 and 9209 m s<-1>, the detonation pressure is between 29.3 and 40.5 GPa, the actually measured impact sensitivity is 4-40J, the detonation performance is excellent, and the energetic ion salts are potential energetic materials.

The invention relates to a method for cladding energetic materials and particularly relates to a method for coating energetic materials by taking liquid CO2 as an anti-solvent, a dispersion agent and a drying medium. The method provided by the invention is mainly used for solving the technical problems of the existing method for coating energetic material that the coating is not uniform, the operation is complicated, some special energetic materials cannot be coated by a wet process, the solvent cannot be mutually soluble with a non-solvent to limit the application of the water (or solution) suspension method and cause the environment pollution. The invention provides a method for coating energetic materials by taking liquid CO2 as an anti-solvent, a dispersion agent and a drying medium. The method provided by the invention has the advantages of uniform coating, simple operation, wide application range and no environmental pollution.

The invention discloses a high-gurney-energy low-vulnerability PBX explosive and a preparation method thereof. The PBX explosive comprises ingredients in parts by weight: 90 parts of HMX, 4-4.5 parts of bonding agent, 2-3 parts of insensitiveness agent, 2-2.5 parts of plasticizer, and 0.4-0.5 parts of curing agent. The preparation method of the PBX explosive comprises the following steps: preparing materials; material mixing: performing material mixing by adopting batch-feeding and kneading mode; performing vacuum processing and vacuum pouring; and heating and curing. The PBX explosive has more than 90% of solid content, and is excellent in cast rheological property; the gurney coefficient of the explosive, tested by the standard cylinder experiments, can achieve 2.83km/s, and the explosive has high safety.

Embodiments of the present subject matter provide an improved percussion primer composition and improved hot-wire igniter acceptor, wherein lead styphnate is replaced with a lead-free material, 4,6-dinitro-7-hydroxybenzofuroxan, potassium salt (KDNP). Embodiments of the percussion primer composition include KDNP, a sensitizer, an oxidizer, calcium silicide, a fuel, and a binder. Sensitizers may include tetracene. Oxidizers may include alkali or alkaline earth nitrates, oxides, or peroxides (such as barium nitrate). Fuel materials may include metals, metal sulfides, or other non-metallic materials. Common binders may include nitrocellulose based shellacs, gum arabic/poly vinyl alcohol mixtures, and guar gum/poly vinyl alcohol mixtures. Embodiments of the hot-wire igniter device include a bridgewire, an acceptor, and an output, where KDNP is the acceptor. Power supply may be in the form of constant current/voltage or current flow from a capacitor discharge. Certain embodiments utilize a variety of output formulations, such as BKNO₃, black powder, and Red Dot double base propellant.

The invention discloses a method and a device for preparing a nanometer-eutectic energetic material. The method comprises the following steps that an energetic material is dissolved in a good solvent and then is transported into a temperature gradient heating furnace through inert gases in an ultrasonic spray manner, and then nanometer-eutectic energetic material crystals are collected through a high-voltage electrostatic field and the good solvent and the inert gases are cooled and recovered. The device used in the method is formed by sequentially communicating an ultrasonic device, the temperature gradient heating furnace, the high-voltage electrostatic field and a receiving device in a sealing manner. The method can prepare the energetic material crystals with the crystal size being 20-1000nm, is wide in preparation range, and can realize continuous operation. The preparation method is simple in procedures and is easy to operate, reaction conditions are mild and are easily controlled, and the method can be applied to various kinds of eutectic explosives. The crystal grains of the prepared nanometer-eutectic energetic explosives are uniform, and the purity is larger than 99.9 percent. Waste liquid in the preparation procedures is recovered, and the minimum pollution to the environment is realized.

The invention is a composition for a high burning-rate solid rocket propellant, where the composition includes a binder compounded with a soluble energetic additive; a metallic fuel; and an oxidative fuel. The resulting composition has a tactical Class 1.3 hazard rating, and a linear regression rate that is substantially equivalent to a tactical Class 1.1 hazard rating obtainable using solid rocket propellants. The composition may include a heat-conducting element, a plasticizer, a curing component, a combustion catalyst, and curing catalyst.

A non-toxic, non-hydroscopic percussion primer composition and methods of preparing the same, including at least one explosive component that has been traditionally considered a moderately insensitive explosive or secondary explosive, and at least fuel particle component having a particle size of about 1.5 microns to about 12 microns, which allows the use of moderately active metal oxidizers. The sensitivity of the primer composition is created by the interaction between the moderately insensitive explosive and the fuel agent such that traditional primary explosives such as lead styphnate or DDNP are not needed. The primer composition also eliminates the risks and dangers associated with traditional nano-sized fuel particles.

The invention discloses a 4-nitro-3-(5-tetrazole) furoxan energetic ionic salt and a preparation method thereof, belongs to the technical field of energetic materials. A synthesis method of the 4-nitro-3-(5-tetrazole) furoxan energetic ionic salt is as follows: directly reacting the 4-nitro-3-(5-tetrazole) furoxan with a corresponding cation, and steaming for eliminating a solvent so as to obtain a target product; reacting the 4-nitro-3-(5-tetrazole) furoxan with the sulfate of the equimolar corresponding cation after mixing the 4-nitro-3-(5-tetrazole) furoxan with equimolar Ba(OH)2.8H2O, filtering and precipitating, steaming and eliminating the solvent in the filtrate to obtain the target product. The synthesis method provided by the invention is simple and easy to industrialize. The referred 9 energetic ionic salt has high density (rho: 1.55-1.84g/cm3), wherein the degree of percussion sensitivity of two compounds is more than 40J, and the energetic ionic salt belongs to insensitive explosive. The energetic ionic salt has excellent calculation detonation property and is a potential energetic material.

A high energy propellant, comprising an oxetane thermoplastic elastomer energetic binder admixed with a high energy explosive filler. The oxetane thermoplastic elastomer energetic binder preferably comprises from about five percent to about thirty percent by weight and the high energy explosive filler comprises from about seventy percent to about ninety-five percent by weight of the composition. A preferred propellant further includes an explosive plasticizer, preferably in an amount of about four percent to about seven percent of the plasticizer by weight of the propellant. The preferred filler is selected from the group consisting of CL-20, TNAZ, RDX and mixtures thereof. The preferred plasticizer is selected from the group consisting of TNAZ, BTTN, TMETN, TEGDN, BDNPA/F, methyl NENA, ethyl NENA and mixtures thereof. In a preferred embodiment, the propellant is actually a pair of high energy propellants comprising a mixture of first and second high energy propellants with the first propellant having a burning rate at least two times faster than the burning rate of the second propellant. The first propellant includes an oxetane thermoplastic elastomer energetic binder admixed with CL-20 high energy explosive filler. The second propellant including an oxetane thermoplastic elastomer energetic binder admixed with RDX high energy explosive filter. Plasticizers and relative amounts for each of the first and second propellants are the same as for the single propellant.

The invention discloses a preparation method of a cubic short rod-like 1-oxygen-diamido-3,5-dinitro pyrazine (or 2,6-diamido-3,5-dinitro pyrazine-1-oxide with a code being LLM-105) explosive. According to the method, a solvent-non-solvent impinging jet crystallization mode is adopted; nitric acid (HNO3) is taken as a good solvent of LLM-105; the LLM-105 crystal is rapidly crystallized and separated out in a non-solvent containing a surfactant. By adopting the method disclosed by the invention, the cubic short rod-like LLM-105 crystal with regular crystal morphology can be obtained; the rod length of the LLM-105 crystal is 2-3 microns. The thermal performance of the LLM-105 crystal prepared by the method disclosed by the invention is obviously changed; thermal decomposition peak temperature is reduced to 343 DEG C from 350 DEG C; the LLM-105 crystal prepared by the method disclosed by the invention can be applied to a booster explosive.

Hexabenzylhexaazaisowurtzitane is converted to tetracetyl, dibenzyl azaisowurtzitane. The benzyl groups are removed by catalytic transfer hydrogenolysis leaving a pair of available nitrogens. The available nitrogens are acetylated, and the resulting intermediate is converted to CL-20 with a strong nitrating agent.

An ammonium nitrate and paraffinic material based gas generating composition is provided. The gas generating composition includes ammonium nitrate as a oxidizer, mixed with a paraffinic material as a fuel. Examples of paraffinic material include paraffin wax, and broadly includes polyolefins. Polyolefins include polyethylene, polypropylene and polybutylene. Additionally, as alternatives, the gas generating composition of the present invention can also include a small quantity of magnesium stearate, potassium perchlorate or alternatively, RDX. The ammonium nitrate oxidizer, the paraffinic material fuel and the additional alternative components are combined and mixed in a predetermined stoichiometric ratio. The gas generating composition is devoid of metal oxides and produces virtually no particulate and slag upon ignition. It also produces an acceptable, low level of undesirable trace effluents such as carbon monoxide, and nitric oxide, both of which are inherently present in nonazide gas generating compositions. The gas generating composition is environmentally friendly after the deployment of the gas generant and abrasive damage to the tooling used in the manufacture of the gas generating composition is minimized.

The invention discloses metal fiber toughened and enhanced TNT (trinitrotoluene)-based melt-cast explosive and a preparation method thereof. The melt-cast explosive comprises components in parts by weight as follows: 30-40 parts of TNT, 60-70 parts of hexogen or octogen, 0-3 parts of metal fiber and 0-2 parts of paraffin. The preparation method comprises the steps as follows: a surfactant solution is used for treating the metal fiber; materials are compounded; the materials are placed in an explosive melting machine for mixing; and casting is performed under atmospheric pressure. The TNT-based melt-cast explosive has the mechanical properties as follows: the compressive strength is larger than or equal to 24 MPa, the compressive strain is larger than or equal to 0.33%, the compressive modulus of elasticity is larger than or equal to 9 GPa, lower mechanical sensitivity is provided, the friction sensitivity is 0%-10%, and the impact sensitivity is 20%-40%.

The invention discloses preparation of skin explosive and an explosion lamination method of a texture interface. A base plate with a certain texture structure is arranged on the surface; an outwards-protruding or flat covering plate is pressed into a concave part of the base plate under the action of the skin explosive or other explosion energy; a convex part of a base plate material is sunk into a concave part of the covering plate, so that the tight combination is realized. The skin explosive has the characteristics of stable detonation performance and good viscoelasticity, stability, storage performance and the like, and can be prepared into rolls in advance to be stored, so that explosive distribution time is shortened and the continuous production of compounding metal boards is convenient to realize; the skin explosive can be compounded with metal materials, namely plates, rods, pipes and the like. A texture interface composite plate is subjected to the explosion lamination by adopting a manner of combining physical extruding deformation with a metallurgical bonding phase, and the physical and chemical properties of sheet materials on the two sides of a combining interface are not changed; the explosive amount of a unit area is small and the energy utilization rate is high. The explosion lamination method of the texture interface can be applied to the production of metal plates and thin plates, which have greater physical property difference, such as melting points.

A gas generating composition is obtained in which an amount of a combustion residue based on a unit amount of a gas generated is reduced.A gas generating composition comprising nitroguanidine, guanidine nitrate or a mixture thereof as a fuel and further an oxidizing agent. The oxidizing agent is a perchloric acid salt, a nitric acid salt or a mixture thereof, and when the oxidizing agent is ammonium perchlorate, a chlorine neutralizer is further incorporated.

The invention relates to bispyrazolyl energetic compounds and a preparation method thereof, and belongs to the technical field of energetic materials. The synthesis method of the compounds comprises the following steps: 1, reacting 3,4,5-trinitropyrazole with 4-chloropyrazole to obtain a compound (2), nitrating the compound (2) to obtain a compound (3), aminating to obtain a compound (4), and acidifying and aminating to obtain a neutral maternal (5) and a compound (7) respectively; 2, oxidizing the neutral maternal to obtain a compound (6); 4, mixing the neutral maternal (5) with Ba(OH)2.8H2O, reacting the obtained mixture with sulfate of a corresponding cation, filtering, and evaporating the obtained filtrate to remove a solvent in order to obtain target products (8-12); and 4, directly reacting the neutral maternal (5) with the corresponding cation, and evaporating the obtained material to remove a solvent in order to obtain target products (13-16). The referred fourteen energetic compounds have the characteristics of good thermal stability, high density, low impact sensitivity, and excellent calculated detonation performance, and are potential insensitive high explosives.

The invention relates to the field of initiating explosive devices, in particular to a nano-explosive preparation system and a nano-explosive preparation method based on the microfluidic technology. The system comprises a fluid driving unit, a recrystallization unit, a sample collection unit and a connection component; the fluid driving unit is used for driving solvents and non-solvent solutions;the recrystallization unit comprises a temperature control device and a microchip; the microchip comprises a micro-mixing structure; after the fluid driving unit drives the solvents and the non-solvent solutions to contact with the microchip, rapid mixing can be realized at a recrystallization temperature under the action of the micro-mixing structure to form suspensions; the sample collection unit is used for collecting the suspensions flowing out from the microchip; the connection component is sequentially connected with the fluid driving unit, the recrystallization unit and the sample collection unit. The nano-explosive preparation system and the nano-explosive preparation method have the advantages that the solvents and the non-solvent solutions are rapidly mixed to react to generate the suspensions through the temperature control device and the micro-mixing structure of the recrystallization unit, and the suspensions are washed, filtered and dried to obtain nano-explosives with uniform crystal forms, good crystal appearance and concentrated particle size distribution.