25 results about "Nitroamine" patented technology

The invention belongs to the technical field of energetic plasticizer preparation, and particularly discloses a method for preparing N-butyl nitroxyethyl nitramine through ionic liquid nitration. The method comprises the following steps: mixing an ionic liquid nitrating agent with butyl ethanolamine to obtain a mixed solution; and mixing the mixed solution with a catalyst and acetic anhydride, reacting, and carrying out post-treatment to obtain the N-butyl nitroxyethyl nitramine. According to the method, the ionic liquid with stable properties is adopted as the nitrating agent, the reaction is mild when the ionic liquid is mixed with the butylethanolamine, violent heat release caused when fuming nitric acid is in contact with the butylethanolamine is effectively avoided, and the ionic liquid precursor can be recycled through simple extraction after the reaction.

The invention relates to the technical field of carbon dioxide capture, in particular to a method for preventing formation of nitramine in a carbon dioxide absorption process, which comprises the following steps: S1, selecting a proper amine solvent, and replacing traditional monoethanolamine (MEA) or diethanolamine (DEA) with an improved amine solvent, such as an amino acid salt solution or chain alkylamine; the performance of the solvent is optimized, and an amine solvent which is excellent in long-term stability, easy to regenerate and good in thermodynamic property is selected. By optimizing the operation temperature and pressure, the side reaction is inhibited to the maximum extent, each absorption tower section is finely controlled by adopting a sectional absorption process, and the nitramine generation risk is further reduced; through comprehensive application of a novel amine solvent and a nitramine inhibitor and a combined strategy for optimizing operation conditions, an efficient, stable and environment-friendly carbon dioxide absorption method is provided, the absorption capacity is improved, and the excellent solvent regeneration performance and by-product control capacity are further provided.

An analytical process for detecting compounds in a sample suspected of containing a peroxide-based compound, a nitrate-based compound, a nitrotoluene-based compound, or a nitramine-based compound includes treating the sample with a superbase and then contacting the sample with a composition. The composition includes or consists of a Ni-porphyrin and an acid and optionally an acid stable solvent.

This invention discloses a method for the deamination functionalization of aliphatic nitrosamines, comprising: reacting an aliphatic nitrosamine as shown in formula (II) with a nucleophile in the presence of an acid and a solvent to generate a deamination functionalized product as shown in formula (III); wherein, R 1 R 2 R 3 Each group is independently selected from hydrogen, hydroxyl, alkyl, alkoxy, alkanoyl, alkoxycarbonyl, alkylsulfinyl, alkylsulfonyl, aryl, heteroaryl, phenylalkyl, or R 1 R 2 R 3 Two or three of the functional groups form a non-aromatic ring, cage-like compound; FG is a functional group in which a nucleophile participates in the reaction. The method of this invention has the advantages of inexpensive and readily available raw materials, simple reaction conditions, and wide substrate applicability.

The application relates to a one-dose two-purpose borate ester bonding agent, a synthesis method and application thereof. The new borate ester bonding agent is synthesized from boric acid, n-butanol, pinacol and bis(2-hydroxyethyl)amino(trihydroxymethyl) according to a certain proportion through a three-step reaction. The new borate ester bonding agent synthesized by the application can significantly improve the interfacial bonding performance of nitramine explosives (HMX, RDX, CL-20) and a solid propellant binder matrix. Since the structure contains a polyhydroxy structure, the new borate ester bonding agent can also enter a crosslinking network to play a crosslinking agent role, thereby greatly improving the mechanical properties of the solid propellant. The new borate ester bonding agent is suitable for GAP propellant formulations and also suitable for hydroxyl-terminated propellant formulations. The application provides a new borate ester bonding agent design idea. The bonding agent synthesis method is simple and stable, the synthesis raw materials are widely sourced, the quality is easy to enlarge and control, and the mechanical properties of the polyether propellant can be significantly improved.

The invention relates to the technical field of solid propellants, and particularly discloses a polycyanide polyhydroxyl bonding agent, a preparation method and application of the polycyanide polyhydroxyl bonding agent in a hydroxyl-terminated polybutadiene propellant.The preparation method of the bonding agent comprises the steps that acrylonitrile is dropwise added into polyethylene polyamine, and a temperature rise reaction is conducted to prepare an intermediate; and adding glyceric acid into the intermediate, heating to carry out amidation reaction, and distilling until no liquid is distilled off to obtain the target bonding agent. The bonding agent is of a polycyanide polyhydroxyl molecular structure, hydroxyl in the bonding agent and toluene diisocynate can enter a cross-linked network through chemical bonding, cyano can generate a very strong physical adsorption effect with the surfaces of nitramine oxidizing agent particles, and the bonding agent is used as a nitramine or nitramine modified hydroxyl-terminated polybutadiene solid propellant system. After the bonding agent provided by the invention is added into a solid propellant system, the normal-temperature, high-temperature and low-temperature mechanical properties of the solid propellant are obviously improved.

The invention discloses a high-nitramine high-energy propellant, a combustion performance regulator and a preparation method of the high-nitramine high-energy propellant, and belongs to the technical field of solid propellants. The molecular general formula of the combustion performance regulator is MLn, wherein M is Pb < 2 + > and Cu < 2 + >, and the molar ratio of Pb < 2 + > to Cu < 2 + > is 1: 1; l is a deprotonated ligand from a ligand H2L, and the ligand H2L is salicylic acid; and n is 1 or 2. The combustion performance regulator can significantly improve the combustion rate of high-nitramine (such as RDX and HMX) high-energy propellants, can reduce the combustion rate pressure index of the propellants, and reduces the negative effects on the energy level and mechanical properties of the propellants. The preparation method of the combustion performance regulator comprises the following steps: dropwise adding a salt solution of M into a ligand solution and carrying out a reflux reaction, and the method is simple in process, high in yield and easy for industrial production, and has a remarkable application prospect.

Disclosed herein is a process for the preparation and purification of Valsartan. The process according to the invention is capable of removing the toxic nitroamine impurities and providing substantially pure Valsartan.

The invention relates to the technical field of solid rocket propellants, and particularly discloses a phosphoric acid modified cyclic borate bonding agent and a preparation method and application thereof.The bonding agent does not contain nitrogen atoms, contains a cyclic structure, further introduces high-polarity phosphorus-oxygen (P = O) groups and has multiple hydroxyl groups capable of participating in a curing reaction; the compatibility with nitrate in a high-energy propellant is good, and ammonia release caused by the adoption of a bonding agent containing amido is avoided; the catalyst has good hydrolytic stability, and can generate a bonding effect with a nitramine filler in a coordination bonding manner; by improving the surface and interface performance of the solid filler and increasing the infiltration speed of the adhesive to the solid filler, the pharmaceutical process performance of the propellant can be improved; and the polymer can also be used as a chain extender and a reinforcing agent to optimize and regulate a matrix network structure, so that the purposes of high strength and high elongation are achieved. The bonding agent can meet the development requirements of NEPE high-energy propellants on high mechanical properties and optimized process properties.

The invention provides an analytical process, which preferably is a one-step process, for detecting in a sample peroxide-based explosives, and / or nitrate-based explosives , the process comprising contacting a sample suspected of containing a peroxide-based compound, especially a peroxide-based explosive, or a nitrate salt, especially a nitrate-based explosive, with a composition comprising a Ni-porphyrin, an acid and preferably an acid-stable solvent.

The invention discloses an amine liquid degradation rate online monitoring method and system, electronic equipment and a storage medium, a barren solution after rich solution desorption is sampled and analyzed to obtain target parameters, and the target parameters comprise conductivity, nitramine substance concentration and acid radical ion concentration; environmental parameters and liquid parameters of barren liquor are obtained, the environmental parameters comprise the temperature and pressure of the current environment, and the liquid parameters comprise the CO2 concentration and the liquid flow rate; determining a current temperature and pressure compensation coefficient according to the environmental parameters; inputting the environmental parameters and the liquid parameters into a trained algorithm model to obtain a weight coefficient corresponding to each type of target parameters; and executing an amine liquid concentration control strategy according to the amine liquid degradation rate. Compared with a fixedly set weight coefficient, the weight coefficient of the target parameter is dynamically adjusted according to the current environment parameter and the liquid parameter, and the weight coefficient can be obtained more accurately; the amine liquid degradation rate can be quickly calculated according to the temperature and pressure compensation coefficient, the target parameter and the weight coefficient.

The invention discloses a deamination functionalization method of fatty amine or fatty nitro-amine, which comprises the following steps: reacting fatty amine as shown in a formula (I) or fatty nitro-amine as shown in a formula (II) with a nucleophilic reagent in the presence of acid and a solvent to generate a deamination functionalization product as shown in a formula (III), wherein R1, R2 and R3 groups are independently selected from hydrogen, hydroxyl, amino, alkyl, alkoxy, alkanoyl, alkoxycarbonyl, alkyl sulfinyl, alkyl sulfonyl, aryl sulfonyl, aryl, heteroaryl and phenylalkyl, or two or three of the R1, R2 and R3 groups form a non-aromatic ring and a cage compound; fG is a functional group for the nucleophilic reagent to participate in the reaction. The method has the advantages of cheap and easily available raw materials, simple reaction conditions, wide substrate applicability and the like.

The present invention discloses an ethoxylated [6] aromatic hydrocarbon microcrystal and its application in recovering nitroaniline. The present invention obtains ethoxylated [6] aromatic hydrocarbon solid microcrystals by a cooling crystallization-vacuum drying method. The ethoxylated [6] aromatic hydrocarbon microcrystals are dispersed in waste containing nitroaniline to achieve adsorption of nitroaniline by the ethoxylated [6] aromatic hydrocarbon solid powder. The adsorption method of the present invention is simple to operate, safe and reliable, and has high adsorption efficiency. The ethoxylated [6] aromatic hydrocarbon solid powder is easily obtainable and reusable.

This invention discloses a method for degrading composite solid propellants: the composite solid propellant to be degraded is immersed in a degradation solvent, during which it is degraded. The degradation solvent includes an effective component and a reinforcing component. The effective component is a nitramine compound, specifically N-butylnitrooxyethylnitramine. The reinforcing component is one of an ethanol / water mixture, ethyl acetate, or dichloromethane, to address the disposal problem of spent composite solid propellants. This invention degrades and breaks down the long-chain macromolecules of spent composite solid propellants using a degradation solvent. The operation is simple, the reaction conditions are mild, and it can degrade various propellants, effectively solving the post-treatment problem of waste composite solid propellants.

The invention provides an analytical process, which preferably is a one-step process, for detecting in a sample peroxide-based explosives, and / or nitrate-based explosives , the process comprising contacting a sample suspected of containing a peroxide-based compound, especially a peroxide-based explosive, or a nitrate salt, especially a nitrate-based explosive, with a composition comprising a Ni-porphyrin, an acid and preferably an acid-stable solvent.

The present invention relates to the technical field of solid propellants, and specifically discloses a polycyanide-polyhydroxy bonding agent, a preparation method, and its application in hydroxybutyl propellant. When preparing the bonding agent, acrylonitrile is added dropwise to polyethylene polyamine, and the temperature is raised to react to prepare an intermediate; then glyceric acid is added to the intermediate, the temperature is raised to carry out an amidation reaction, and then distilled until no liquid is distilled out to obtain the target bonding agent. The bonding agent has a polycyanide-polyhydroxy molecular structure, in which the hydroxyl groups can enter a cross-linked network through chemical bonding with toluene diisocyanate, and the cyano group can produce a strong physical adsorption effect with the surface of nitramine oxidant particles, and is used as a nitramine or nitramine-modified hydroxybutyl solid propellant system. After adding the bonding agent provided by the present invention to the solid propellant system, the room temperature, high and low temperature mechanical properties of the solid propellant are significantly improved.

The invention belongs to the technical field of solid propellants, and particularly relates to a hydroxyl-terminated polybutadiene propellant and a preparation method thereof, and the propellant comprises the following components by mass: 6.5-8.5% of an adhesive; 3.0-4.0% of a plasticizer; 0.3-0.4% of a curing agent; 0.1%-2.0% of a combustion rate regulator; 0.01%-0.5% of a bonding agent; 15-19% of metal fuel; 5-18% of a nitramine explosive; 55-65% of an oxidizing agent; wherein the adhesive is a mixture formed by mixing hydroxyl-terminated polybutadiene and carboxyl-terminated polybutadiene in a mass ratio of (4-1.5): 1, and the burning rate regulator is a mixture of ferrocenecarboxaldehyde and copper phthalate and / or ferric oxide; the response grade of the hydroxyl-terminated polybutadiene propellant to a bullet shooting test, a fragment impact test and a shaped charge jet impact test is combustion.

The invention discloses a low-pressure-index high-energy micro-smoke propellant and a preparation process thereof.The low-pressure-index high-energy micro-smoke propellant is prepared from, by mass, 20%-30% of an adhesive system, 10%-20% of a nitramine explosive, 30%-40% of an insensitive energetic explosive, 10%-20% of a core-shell structure composite combustion rate catalyst and 0.5%-1% of a combustion stabilizer, 0.5%-1.5% of a curing agent and the balance of a functional auxiliary agent. According to the low-pressure-index high-energy micro-smoke propellant, the insensitive energetic explosive is introduced into the low-pressure-index high-energy micro-smoke propellant, the content of the nitramine explosive is reduced, and the core-shell structure composite burning rate catalyst is added on the basis, so that the safety risk of the propellant is greatly reduced, the burning rate adjustable range of the propellant is effectively widened, the burning rate pressure index is reduced to 0.55 or below from about 0.8, and meanwhile, the low-pressure-index high-energy micro-smoke propellant has the advantages that the low-pressure-index high-energy micro-smoke propellant has good application prospects. The propellant is excellent in processing property and mechanical property and low in smoke signal characteristic.

The invention discloses a nitramine compound / potassium perchlorate / zinc-magnesium alloy high-energy insensitive explosive which comprises the following components in percentage by weight: 49-51% of nitramine compound, 26-34% of potassium perchlorate and 17-23% of zinc-magnesium alloy powder, the mass fraction of magnesium in the zinc-magnesium alloy powder is 50%, and the zinc-magnesium alloy powder is prepared by adding Zn powder into Mg powder through a centrifugal atomization method. The high-energy insensitive explosive disclosed by the invention is high in exothermic peak temperature and good in thermal safety; meanwhile, heat release is concentrated and large, and the characteristic of high energy release rate is achieved; the impact sensitivity and the friction sensitivity of the formula are low, and the mechanical safety is good.

The invention discloses a BGAP-PEG400 polyurethane elastic material as well as a preparation method and application thereof, and the BGAP-PEG400 polyurethane elastic material is prepared from the following raw materials in percentage by mass: 35-38% of branched glycidyl azide polymer, 10-20% of polyisobutylene glycol, 10-20% of polyisobutylene glycol, 10-20% of polyisobutylene glycol, 10-20% of polyisobutylene glycol, 10-20% of polyisobutylene glycol, 10-20% of a The content of the n-butyl nitroxyethyl nitramine is 35%-45.6%, the content of the trimethylolpropane is 2.2%-2.4%, and the content of the polyethylene glycol is 3.5%-3.8%; the triphenyl bismuth accounts for 0.3%-0.5%, the curing agent accounts for 5%-15%, and the sum of the mass percentages of all the components is 100%; the preparation method comprises the following steps: blending branched glycidyl azide polymer (BGAP) and polyethylene glycol 400 (PEG400), and preparing the BGAP-PEG400 polyurethane elastic material with more excellent mechanical properties by taking n-butyl nitroxyethyl nitramine as a plasticizer, trimethylolpropane as a cross-linking agent and triphenyl bismuth as a catalyst and using a compound curing agent. The preparation method of the BGAP-PEG400 polyurethane elastic material disclosed by the invention is simple, chain extension does not need to be carried out on the glycidyl azide polymer, and the advantages of relatively high flexibility and small molecular weight of a PEG400 molecular chain are fully exerted.

A flow reactor for the synthesis of energetic materials, comprising; a first input flow reagent, and a second input flow reagent, a flow reactor, comprising at least two temperature zones within the flow reactor. In another aspect, this flow reactor is used in a method for the flow synthesis manufacture of energetic materials. Preferred energetic materials include poly nitrated moieties selected from nitramines, heterocycles, aromatics, aromatic heterocycles, or aliphatic hydrocarbons. In yet another aspect, a method for the flow synthesis manufacture of RDX (hexogen), comprising the steps of (i) preparing input flow reagent A, comprising hexamine pre-dissolved in water or glacial acetic acid, (ii) preparing input flow reagent B comprising greater than 95% concentration nitric acid, (iii) causing the input flow reagents A and B to enter the mixing zone at a flow rate, so as to cause a total nitric acid concentration of greater than 90%, in said flow reactor, (iv) cooling the mixing zone to less than 15°C, (v) causing the mixed flow to pass through into the reaction zone, heating the reaction to greater than 25°C (vi) optionally quenching the output flow from the reaction zone, to cause precipitation of RDX (cyclonite).

The invention relates to the technical field of solid rocket propellants, and particularly discloses a neutral bonding agent containing an enamine structure and a preparation method and application of the neutral bonding agent. Glycidyl acrylate and cyanoethyl modified polyene polyamine epoxy ring-opening product, butyl acrylate and hydroxyethyl acrylate are adopted as polymeric monomers, and the neutral bonding agent containing the enamine structure and the preparation method and application of the neutral bonding agent containing the enamine structure are obtained. According to the prepared neutral bonding agent containing the enamine structure, amino in the molecular structure and ammonium perchlorate are easily subjected to acid-base neutralization to form ionic bonding, and a tear-resistant layer is formed; and meanwhile, the molecule also contains cyanoethyl which is far away from the main chain of the neutral bonding agent, so that the bonding effect on a nitramine oxidizing agent is relatively good. According to the invention, the problem that the mechanical property of the NEPE propellant formula is reduced due to introduction of ammonium perchlorate is solved.

The invention discloses an NC / Bu-NENA / IPDI adhesive system and a preparation method thereof. The NC / Bu-NENA / IPDI adhesive system comprises the following raw materials: 55%-65% of a nitrocotton single-base spherical drug, 30%-35% of butyl-nitroxyethyl nitramine, 1%-2% of a composite stabilizer CS-85, 1%-10% of isophorone diisocyanate and 0.02%-0.1% of triphenyl bismuth. The specific impulse of the cross-linked double-base propellant reaches 1993.55 N.s.kg <-1 > (7MPa), and the cross-linked double-base propellant is suitable for preparation of dumbbell-shaped mechanical samples of the cross-linked double-base propellant and research on a formula process of a cross-linked modified double-base propellant adhesive system.

The invention discloses a method for coating nitramine explosive particles with energetic polymer nitrocellulose, and belongs to the technical field of polymer materials. The method mainly comprises the following steps: firstly dissolving nitrocellulose in a mixed solvent of ethanol and acetone, then dropwise adding into a deionized water phase in which a nitramine explosive is dispersed, and preparing the nitrocellulose coated nitramine explosive by virtue of a solvent replacement method. The whole reaction process is carried out in a water phase, the coating efficiency is high, and the method can be used for nitramine explosives with different sizes, different shapes and different types. The nitrocellulose has excellent energy level and good compatibility with a propellant matrix, so that the relatively high energy level of the whole propellant can be maintained while the dehumidification phenomenon of nitramine explosives in the propellant is inhibited, and the problem that the specific impulse of the propellant is severely reduced due to a traditional inert coating material is solved.

The application discloses a method for deaminative functionalization of aliphatic amine or aliphatic nitroamine, which comprises: reacting aliphatic amine as shown in formula (I) or aliphatic nitroamine as shown in formula (II) with a nucleophile in the presence of an acid and a solvent to generate a deaminative functionalization product as shown in formula (III); wherein, R 1 , R 2 , R 3 groups are each independently selected from hydrogen, hydroxyl, amino, alkyl, alkoxy, alkanoyl, alkoxycarbonyl, alkylsulfinyl, alkylsulfonyl, arylsulfonyl, aryl, heteroaryl, phenylalkyl, or two or three of R 1 , R 2 , R 3 groups form a non-aromatic ring, a cage compound; FG is a functional group for reaction of the nucleophile. The method has the advantages of cheap and easily available raw materials, simple reaction conditions, wide substrate applicability and the like.