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3.2.1. Ammonium nitrate is an odourless crystalline substance commonly used as a fertilizer that has been the cause of numerous industrial explosions over the decades. An explosion of ammonium nitrate was responsible for the worst industrial accident in US history in 1947. It also destroyed Texas City in 1947 and the Alfred P. Murrah Federal Building in Oklahoma City in 1995. 21 septembre 2001, Toulouse. The compound is just part of our history with explosives. IR identification and quantification of NO. Le nitrate d’ammonium est pourtant en tant que tel relativement peu explosif. The heat of reaction is utilized for evaporation and 80–83% ammonium nitrate solution is obtained. Kauffman said, in principle, ammonium nitrate should be highly explosive by itself, but it is not. On Aug. 4, a devastating explosion struck the area around a port in Beirut. Un stock de 2 750 tonnes de cette substance a explosé, mardi 4 août, dans la capitale libanaise. Le nitrate d'ammonium à l'origine supposée des explosions de Beyrouth mardi est un sel blanc et inodore utilisé comme base de nombreux engrais azotés sous forme de granulés. Aluminum sulfate has also been used as a drying additive for ammonium nitrate. Explosions accidentelles ayant impliqué du nitrate d'ammonium 2 avril 1916, explosion de Faversham, Kent (Royaume-Uni. Les chimistes l'ont appris le 21 septembre 1921. expert reaction to Beirut explosion . Car à partir de 200 °C, le nitrate d'ammonium (ou ammonitrate) se décompose et, en général, cela explose. The monster explosion that destroyed a good bit of Beirut was caused by the detonation of more than 2,700 tons of the fertilizer ammonium nitrate – a ghastly amount of one seriously scary chemical. 13 décembre 1994, Sioux City (États-Unis). Présenté comme l'origine des explosions à Beyrouth, le nitrate d'ammonium est principalement employé comme engrais «azoté» pour un usage agricole. Cette explosion est la conséquence d'un incendie qui a ravagé des magasins dans lesquels étaient stockées 15 tonnes de TNT et 150 tonnes de nitrate d'ammonium. Explosion sur un chantier avec du nitrate d’ammonium mélangé à de l’essence et des pastilles d’aluminium. Calcium ammonium nitrate (CAN), prepared from ammonium nitrate and calcium carbonate, is used in some cases as an alternative to ammonium nitrate. Explosives expert claims Beirut explosion that killed 160 was caused by burning military missiles - not ammonium nitrate – because the blast cloud was orange not yellow . 5th August 2020. Le nitrate d’ammonium (NH4NO3) est le fruit de la réaction entre l’ammoniac et l’acide nitrique. Ammonium nitrate: what is it and why did it cause the blast in Beirut? When it suddenly exploded on August 4th, 2,750 metric tons of the volatile substance had been sitting in port for seven years. While these alternatives have helped, it is important to note that unintended impurities in the manufacturing process may reduce its stability or facilitate explosion. Explosions à Beyrouth : qu’est-ce que le nitrate d’ammonium, à l’origine de plusieurs accidents ? ZOOM - Selon le gouvernement libanais, 2750 tonnes de nitrate d'ammonium seraient à l’origine des explosions qui ont dévasté Beyrouth ce mardi. Nitrogen dioxide (NO₂) is a red, bad-smelling gas. Risque au-delà de 290 °C. Global production was estimated at 21.6 million tonnes in 2017. La terrible explosion qui a frappé Beyrouth a été, selon les autorités libanaises, causée par le stockage de nitrate d'ammonium. "If you look at the video (of the Beirut explosion), you saw the black smoke, you saw the red smoke, that was an incomplete reaction," she said. "I am assuming that there was a small explosion that instigated the reaction of the ammonium nitrate -- whether that small explosion was an accident or something on purpose I haven't heard yet." Une grande explosion dans la poudrerie de la société Explosives Loading Company cause la mort de 116 personnes. Commenting on whether there will likely be remaining health impacts of exposure: Prof Andrea Sella, Professor of Inorganic Chemistry, UCL, said: “I don’t think there is any significant hazard. If the name sounds familiar it's because the chemical is notorious. The IR spectra of ammonium nitrate, pyrite and their mixtures are shown in Fig. Ammonium nitrate may have caused last week’s Beirut explosion, Deutsche Welle reported. Perhaps the closest comparison to Beirut's explosion, in terms of scale, is a blast in Texas City in 1947, which was caused by 2,300 US tons (about 2,087 metric tons) of ammonium nitrate. An ammonium nitrate explosion produces massive amounts of nitrogen oxides. Sur le site de fabrication, explosion de 75 t de nitrate dans le réacteur et la réserve voisine ; le bilan est de 4 morts et 18 blessés. Reaction between ammonium nitrate and reactive ground (RG 1) showing a) the hot stage microscope and b) the generation of gas bubbles. It has been reported by international media, including the BBC and The Guardian, that at least 137 people have died and 5,000 injured. IChemE reaction to the chemical explosion in Beirut. Bands due to surface bound NO species are seen in the region 1750–1800 cm −1. This concentrated solution is further concentrated to obtain 92–94% solution in … À l'origine des explosions à Beyrouth, le nitrate d'ammonium ou ammonitrate, très présent dans les engrais utilisés dans l'agriculture en France. A large explosion in Beirut, Lebanon, was reportedly caused by a large quantity of ammonium nitrate stored in a warehouse near the port. First, ammonium nitrate solution is prepared by reacting preheated ammonia with nitric acid in a neutralizer. 2,750 tons of the chemical that had been stored in a Beirut warehouse blew up, killing dozens of people and injuring many more On 4 August 2020, an explosion occurred at a warehouse storing ammonium nitrate in Beirut, Lebanon. A devastating explosion of an enormous amount of ammonium nitrate killed more than 200 people and injured at least 6,000 at the port of Beirut on the 4th of August 2020. Ammonium nitrate decomposition can be set off if an explosion occurs where it's stored, if there is an intense fire nearby. La Russie est de loin le premier pays producteur, avec près de 10 millions de tonnes en 2017, soit 45 % de la production mondiale, selon la FAO. 5. The red-orange smoke plume was one of the first clues that ammonium nitrate was involved in the explosion in Beirut. 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