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1
Content available Synthesis of HMX via Nitrolysis of DPT Catalyzed by Acidic Ionic Liquids
He Z., Luo J., Lu Ch., Xu R., Li J.
Central European Journal of Energetic Materials
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2011
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Vol. 8, nr 2
83-91
EN
The direct nitrolysis of DPT to synthesize HMX with ionic liquids (ILs) as catalysts was investigated. The results showed that [Et3NH] HSO4 was the best catalyst among 18 ILs used and the yield of HMX was up to 61% against 45% without IL. The ILs could be effciently recovered by simple distillation and extraction after reaction without any apparent loss of catalytic activity even after 10 times recycling.
2
Content available remote Selective Nitration of Chlorobenzene on Super-acidic Metal Oxides
Cheng G., Ql X., Lu Ch.
Central European Journal of Energetic Materials
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2007
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Vol. 4, nr 4
59-65
EN
The solid catalysts of SO4 2-/TiO2, SO4 2-/TiO2-ZrO2, SO4 2-/WO3-ZrO2, and SO4 2-/MoO3-ZrO2 have been prepared and regioselectiveties of chlorobenzene minonitration on these catalysts were investigated. When the reaction was carried out at 30 C for 30 min, SO4 2-/TiO2-ZrO2(1:1) by a calcination step for 3 h at 550 C enhanced the para-selectivity of chlorobenzene nitration by using nitric acid as nitrating agent, up to an ortho-para isomer ratio 0.17 in product distribution of chlorobenzene mono- nitration, and the yield of chlorobenzene mononitration was 55%. The catalysts could be reutilized for four times with a little decrease in activity.
3
Content available remote Nitration of Toluene and Chlorobenzene with HNO3/Ac2O Catalyzed by Caprolactam-based Bronsted Acidic Ionic Liquids
Ql X., Cheng G., Lu Ch., Qian D.
Central European Journal of Energetic Materials
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2007
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Vol. 4, nr 3
105-113
EN
Several new caprolactam-based Bronsted acidic ionic liquids [Caprolactam]X (X- = pTSO-, BSO-, BF4-, NO3-) with relatively lower cost and lower toxicity were synthesized and for the first time used in catalyzing organic reaction. They showed good catalytic activity in the nitration of toluene and chlorobenzene with HNO3/Ac2O under mild conditions. Among them, [Caprolactam]pTSO was the best one probably because of its better affinity to aromatics than the others. [Caprolactam]pTSO catalyzed the nitration of toluene with achieving a high yield (99.7%, calculated by quantitative GC) and better para-selectivity (ortho/para=1.03) than the traditional mixed acid methodology. And the catalyst can be recycled for four times.
4
Content available remote Self-sensitizable Characteristics of Modified Ammonium Nitrate
Ye Z., Qian H., Lu Ch., Liu Z.
Central European Journal of Energetic Materials
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2005
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Vol. 2, nr 4
55-62
EN
Ammonium nitrate has been modified by evaporative recrystallization from its mixture solution with hexadecyl trimethyl ammonium bromide and sodium dodecyl sulfate. The physical property of the modified compound has been nwestigated by SEM, DSC, specific surface area and particle size measurements. The results show that in comparation with common ammonium nitrate, the modified ammonium nitrate has an irregular crystal shape, greater specific surface area, better particle size distribution, lower heat of crystal pattern transition and higher transition temperaturę. These indicate the modified ammonium nitrate has a mesoporous structure with good self-sensitizable, anti-hygroscopic and anticaking performances as an oxidizer of industrial explosive.
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