Low hazard small-scale synthesis and chemical analysis of high purity nitroglycerine (NG)

Abstract

A previously reported two-phase (99.5% fuming nitric acid/dichloromethane) batch method 1 to prepare high purity 1,2,3propanetriyl trinitrate (nitroglycerine, NG) was evaluated, simplified and adapted specifically for low hazard small-scale synthesis. The purity of the product, as determined by NMR spectroscopy, HPLC and IR spectroscopic analysis was found to be greater than 99%. The quick synthetic method is highly recommended when small amounts of highly pure NG are required for analytical and related purposes in the absence of a microreactor.

Interaction and thermal studies on graphene oxide in NC/DEGDN/GO nanocomposites

“…Synthesis of diethyleneglycol dinitrate was conducted following a previously reported method. 23 Nitric acid (99.5%, 4 ml) was added dropwise to sulphuric acid (98%, 4 ml) in a 50 ml 3 neck round bottom ask, ensuring that the temperature of the mixture remained below 15 C. Dichloromethane (30 ml) was then added to the mixed acid. The magnetically stirred mixture was then cooled to 5 C. Diethylene glycol (2.12 g) was slowly added (during 15 min) to the acid/dichloromethane mixture under vigorous stirring.…”

Nitroglycerin stabilisation in a polyester matrix synthesized by the polymerization of an epoxidized vegetable oil

“…The composition of the nitroglycerin‐loaded polyester matrix was investigated qualitatively by comparing the individual infrared spectra of nitroglycerin and the polyester matrix with that of the NG/PM material (Figure 1). The two strong bands observed at 1265 cm −1 and 1633 cm −1 in the nitroglycerin spectrum correspond to −NO 2 symmetric and asymmetric stretches, respectively [12]. These bands, which are not found in the IR spectrum of the polyester matrix, are observed in the one of the NG/PM material, which confirms the presence of nitroglycerin in the elastomer matrix.…”

Nitroglycerin trapping in melamine matrices

“…The absence of the characteristic broad and intense band attributed to the stretching of hydroxyl functional groups in FT-IR spectra (3200-3700 cm −1 ) of Mel/NG-SE and Mel/NG-SFE materials also shows that they do not contain the solvents (ethanol and ethanol/water, respectively) which were used to formulate them. The bands observed in the nitroglycerin spectrum at 1265 cm −1 and 1630 cm −1 , which respectively correspond to the symmetric (ν s ) and asymmetric stretching (ν as ) of -NO 2 groups [ 25 ], are found in Mel/NG-SE and Mel/NG-SFE materials. While there is no significant wavenumber shift of these bands for Mel/NG-SE, shifts of ∼8 cm −1 and ∼6 cm −1 to higher and lower wavenumbers are respectively observed for symmetric and asymmetric stretching of –NO 2 groups for Mel/NG-SFE.…”