decomposes at 200 °C
NIBGkDN is an acronym for nitro-iso-butylglycol dinitrate. This substance is more commonly called nitromethylpropanediol dinitrate, and a more scientific name is 2-methyl-2-nitro-1,3-propanediol dinitrate. It was made on a lab scale by Germany in WWII and has not really found its way into the industrial mainstream as it has been designated too unstable for military use. It was proposed for use in commercial explosives as a substitute for nitroglycerine. It is a white waxy solid that is very sensitive to impact and has low tolerance for heat. Its explosive power is comparable to other detonating compounds.
|2-methyl-2-nitro-1,3-propanediol||300-mL Erlenmeyer flask|
|nitric acid||graduated cylinder|
|sodium sulfite||seperatory funnel|
|sulfuric acid||stirrer/stirring rod|
Gradually sift 50 g of dry, ground 2-methyl-2-nitro-1,3-propanediol into a mixture of 80 mL of 100% nitric acid and 98 mL of 100% sulfuric acid with mechanical stirring at a temperature of about 15 °C in a 300-mL Erlenmeyer flask. After the addition, the temperature is allowed to rise to 20 °C and is kept there for 30 minutes with stirring. Let the mixture stand for 1 hour, then transfer it to a separatory funnel where the heavier spent acid layer can be drawn off. The remaining oil is washed twice with aqueous sodium sulfite solution heated to around 45 °C, and then with warm water until neutral to litmus paper. Transfer the liquid to a beaker and dry under vacuum at 50 °C, the oil is chilled until it becomes milky in appearance and waxy crystals separate. An additional amount of material can be obtained by mixing all the washings and spent acid then extracting with ethyl ether. The ethyl ether is separated and washed with water. The ethyl ether is allowed to evaporate and the residue is dried in a vacuum desiccator. Their should be an additional 16.2% of product. Total yield is 92.2% altogether. You will need a graduated cylinder for measuring liquids, a stirring rod or magnetic stirrer for mixing, and a thermometer to monitor the temperature.
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