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ͼƬºÃÏñ²»Ì«Çå³þ Accession number: 20131716241671 Title: Nitrolysis kinetics of DADN by N2O5/HNO3 Authors: He, Zhiyong1; Luo, Jun1 ; L¨¹, Chunxu1; Xu, Rong2; Li, Jinshan2 Author affiliation: 1 School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, China 2 Institute of Chemical Materials, CAEP, Mianyang 621900, Sichuan, China Corresponding author: Luo, J. (luojun@njust.edu.cn) Source title: Huagong Xuebao/CIESC Journal Abbreviated source title: Huagong Xuebao Volume: 64 Issue: 4 Issue date: April 2013 Publication year: 2013 Pages: 1269-1275 Language: Chinese ISSN: 04381157 CODEN: HUKHAI Document type: Journal article (JA) Publisher: Chemical Industry Press, No. 3 Huixinli, Chaoyangqu, Beijing, 100029, China Abstract: Concentrations of reactant, intermediate, product were measured by HPLC during nitrolysis of DADN(1, 5-diacetyl-3, 7-dinitro-1, 3, 5, 7-tetraazacyclooctane)by N2O5/HNO3 at temperatures of 303, 313, 323, and 333 K. Based on the mechanism of the nitrolysis reaction(first-order consecutive reaction), the kinetic parameters were calculated from these data obtained. The activation energies were 2.3996¡Á104 J¡¤mol-1 for the first step(DADN to SEX(1-acetyl-3, 5, 7-trinitro-1, 3, 5, 7-tetrazacyclooctane))and 1.6598¡Á104 J¡¤mol-1 for the second step(SEX to HMX(high melt point explosive)), and the pre-exponential factors were 2.2000¡Á104 h-1 and 6.5178¡Á102 h-1, respectively. The reaction rate constant is larger for the fist step than for the second one. In order to check the intermediate in nitrolysis reaction of DADN, an experiment was carried out to separate and identify the intermediate(also by-product). The results indicate that this intermediate is SEX. © All Rights Reserved. Number of references: 22 Main heading: Reaction intermediates Controlled terms: Activation energy - Explosives - HMX - Kinetics - Rate constants - Reaction kinetics Uncontrolled terms: Consecutive reaction - DADN - First-order - Nitrolysis - Preexponential factor - SEX Classification code: 801.4 Physical Chemistry - 804 Chemical Products Generally - 931 Classical Physics; Quantum Theory; Relativity - 931.3 Atomic and Molecular Physics DOI: 10.3969/j.issn.0438-1157.2013.04.021 Database: Compendex |
3Â¥2013-06-26 10:02:30
zyh750810
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4Â¥2013-06-26 10:08:17
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5Â¥2013-06-26 10:14:00









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