Thermal Decomposition And Catalytic Mechanism Of Nitration Of Triethylene Glycol

The light yellow liquid product was extracted from tae-gun propellant by aether and was investigated by 1HNMR, GC-MS. The results of 1HNMR spectrum and GC-MS spectrum show that the light yellow liquid mainly contains TEGDN and a little N,N-dimethyl-diphenyl urea. The thermal decomposition reaction of TEGDN has been investigated via TG-DSC, and these results show that the thermal weight loss has completed by one-step reaction, exothermic peak appeared at 230℃, and volume of heat release was 490.5 J/g.Nitrates and oxalic acid were used as raw materials to synthesis nickel oxalate (NiC2O4·2H2O) and copper oxalate (CUC2O4·xH2O) by liquid precipitation method. Then, the obtained oxalates were used as the precursor to synthesis nanometer-sized NiO and CuO by calcinations, respectively. The products were characterized by XRD, FT-IR, Raman, TG, SEM, TEM and so on.Ni powder, NiO, NiC2O4·2H2O, Cu powder, CuO, CUC2O4·xH2O were used as catalysts for the catalytic reaction of TEGDN. Those residues were characterized by XRD and SEM. The results of XRD spectrums show that the catalyst such as Ni powder, NiO and NiC2O4·2H2O have completely become cubic crystal of Ni, the catalyst of Cu powder and CuO have completely become cubic crystal of Cu, and most of the catalyst of CuC2O4·xH2O have changed into cubic crystal of Cu. The results of SEM photos show that the feature of the catalysts have largely changed after reactions.Ni and NiO were used as catalysts for the catalytic reaction of TEGDN, and the reaction systems were treated by chloroform, respectively. The extract liquid was characterized by UV-Vis and FT-IR, and it is found that the reaction system of Ni (or NiO) contains the intermediate state which is similar with Ni(CO)4.