32results about "Nitrated pentaerythritol explosive compositions" patented technology

The invention discloses an explosion hardening explosive and a preparation method thereof. The explosion hardening explosive is prepared from the following raw materials in parts by weight: 40-80 parts of cyclonite and / or pentaerythrite tetranitrate, 10-30 parts of tributyl acetocitrate and 10-30 parts of nitrocotton. The explosion hardening explosive has the beneficial effects that tributyl acetocitrate and nitrocotton as raw materials of the explosion hardening explosive have high intermiscibility; meanwhile, tributyl acetocitrate is non-toxic and is low in volatility; the finished explosive is high in water resistance and plasticity; the explosion hardening explosive contains additives; due to the addition of the additives, the low-temperature plasticity of the explosive is improved, so that the explosive is uniform in density, high in plasticity and easy to tablet; the explosion hardening explosive is stable in explosion property, high in explosion velocity, high in strength, excellent in normal-temperature and low-temperature plasticity, easy to bend and high in in adhesion and application to workpieces under normal temperature and low temperature conditions, and is capable of effectively ensuring the hardening effect of the workpieces.

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 invention relates to micro initiating explosive for an exploder, and solves the problems of insecurity of the exploder with the initiating explosive and high cost of the exploder without the initiating explosive. The micro initiating explosive comprises more than one high explosive and more than one initiating explosive. The high explosive comprises hexogen and PETN; the initiating explosive comprises dinitrodiazophenol, lead azide, lead trinitroresorcinate, nickel hydrazine nitrate and perchloric acid tricarbohydrazide cadmium complex; and the more than one high explosive and the more than one initiating explosive are mixed to prepare the micro initiating explosive. Adhesive and surfactant can also be used. The micro initiating explosive has the advantages that the micro initiating explosive can reduce the content of the initiating explosive by 30 to 60 percent compared with the conventional exploder filled with the explosive, lower 20 to 30 percent of cost compared with the prior exploder, improve safety during assembly of the exploder, reduce static electricity, friction, impact and light and heat sensitivity while ensuring initiating force and flame sensitivity, improve safety during production, transportation, storage and use of the exploders, can reduce explosive feeding amount of the exploder, and improve free-running property of preparations.

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 present invention proposes a flow-type ultrasonic treatment method for the intercrystalline acid of elemental explosives, which comprises taking the crude acid-containing elemental explosives and mixing them with water to form a mixed material; controlling the temperature in the scrubber to keep at 25-45°C; making the mixed material from washing The lower end of the washer enters, the upper end flows out, and ultrasonic treatment is performed after a certain period of circulation; during the ultrasonic process, the temperature in the washer is controlled not to exceed 50°C, and after a certain period of cycle washing, the ultrasonic treatment is stopped when the pH value in the washer is stable; The explosive product is dried after being filtered and rinsed to obtain a simple explosive product meeting the acidity requirement. In this method, the washing water is recycled, the energy consumption is low, the efficiency is high, and it is easy to realize mass production. The method can improve the energy utilization rate of the ultrasonic action through the circulating flow of the washing water, and also further reduce the consumption of water, and the method can be used Large-scale application is realized by connecting multiple ultrasonic scrubbers in series.