Comparative evaluation of purity of green energetic material (ammonium dinitramide) depending on refining method

Selective Dinitramide Removal from Aqueous Solution by Crosslinked PolyDADMAC Gels

“…The molar extinction coefficient (ϵ) of KDN was determined by diluting the KDN stock solution. ϵ was calculated from the graph as 5385.1 L mol −1 cm −1 which is nearly same as it is stated in the literature . …”

New technology for preparing energetic materials by nanofiltration membrane (NF): rapid and efficient preparation of high-purity ammonium dinitramide (ADN)

“…16(a) that the ADN purified by 600D NF membrane has the maximum UV absorption peaks at 212 nm and 284 nm, which is consistent with the maximum UV absorption peaks of ADN reported in the literature. 61 Fig. 16(b) shows the infrared spectrum of ADN.…”

“…16(b) that 1528 cm −1 and 1408 cm −1 are the absorption peaks of –NO 2 anti-symmetric stretching vibrations, 1341 cm −1 and 1181 cm −1 are the absorption peaks of the –NO 2 symmetric stretching vibration, 1025 cm −1 is the absorption peak of the N 3 antisymmetric stretching vibration, 828 cm −1 is the absorption peak of –NO 2 shear bending vibration, 761 cm −1 and 489 cm −1 are the absorption peaks of –NO 2 swing vibration, which are consistent with the ADN characteristic peaks reported in the reference. 61 Fig. 16(c) shows the Raman spectrum of ADN.…”

“…Some scholars have used MIBK precipitation and activated carbon adsorption methods for the desalination and purication of ADN, and have achieved signicant treatment results and obtained ADN products with high purity. [44][45][46][47] Although the above methods have the advantages of good purication effect, low processing cost, economic and environmental protection, and easy industrial scale-up production, they usually require more than two processing steps to complete the whole purication process, and the purication process cannot be carried out in continuous mode, and the extra step of adding chemicals or adsorbents in the process limits the promotion of the above technologies. In addition, the safety of the above processes and the treatment of waste acid and wastewater also need to be improved.…”