Combustion of nitrate ester plasticized polyether propellants

2020 ◽  
Vol 21 (10) ◽  
pp. 834-847
Author(s):  
Xiao-ting Yan ◽  
Zhi-xun Xia ◽  
Li-ya Huang ◽  
Xu-dong Na
Keyword(s):  
Nitrate Ester

Biotransformation of nitrocellulose under methanogenic conditions

1996 ◽  
Vol 34 (5-6) ◽  
pp. 327-334 ◽  
Author(s):  
David L. Freedman ◽  
Bryan M. Caenepeel ◽  
Byung J. Kim
Keyword(s):  
Biological Treatment ◽  
Enrichment Culture ◽  
Basal Medium ◽  
Anaerobic Biodegradation ◽  
Anaerobic Treatment ◽  
Acid Digestion ◽  
Energetic Compounds ◽  
Nitrate Ester ◽  
Digestion Technique ◽  
Aerobic And Anaerobic

Treatment of wastewater containing nitrocellulose (NC) fines is a significant hazardous waste problem currently facing manufacturers of energetic compounds. Previous studies have ruled out the use of biological treatment, since NC has appeared to be resistant to aerobic and anaerobic biodegradation. The objective of this study was to examine NC biotransformation in a mixed methanogenic enrichment culture. A modified cold-acid digestion technique was used to measure the percentage of oxidized nitrogen (N) remaining on the NC. After 11 days of incubation in cultures amended with NC (10 g/L) and methanol (9.9 mM), the % N (w/w) on the NC decreased from 13.3% to 10.1%. The presence of NC also caused a 16% reduction in methane output. Assuming the nitrate ester on NC was reduced to N2, the decrease in CH4 represented almost exactly the amount of reducing equivalents needed for the observed decrease in oxidized N. An increase in the heat of combustion of the transformed NC correlated with the decrease in % N. There was no statistically significant decrease in % N when only NC was added to the culture, or in controls that contained only the sulfide-reduced basal medium. The biotransformed NC has a % N comparable to nonexplosive nitrated celluloses, suggesting that anaerobic treatment may be a technically feasible process for rendering NC nonhazardous.

Composite Propellant Based on a New Nitrate Ester

2014 ◽  
Vol 39 (5) ◽  
pp. 684-688 ◽  
Author(s):  
David A. Reese ◽  
Steven F. Son ◽  
Lori J. Groven
Keyword(s):  
Composite Propellant ◽  
Nitrate Ester

scholarly journals Fast atom bombardment mass spectra of the .BETA.-blocker nipradilol with nitrate ester group-tandem mass spectrometry (MS/MS) and B/E constant linked scanning.

1990 ◽  
Vol 38 (12) ◽  
pp. 3389-3394 ◽  
Author(s):  
Michiaki YONEDA ◽  
Kazuo TSUJIMOTO ◽  
Mamoru OHASHI ◽  
Masami SHIRATSUCHI ◽  
Yasushi OHKAWA ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Tandem Mass Spectrometry ◽  
Beta Blocker ◽  
Mass Spectra ◽  
Fast Atom Bombardment ◽  
Ester Group ◽  
Tandem Mass ◽  
Nitrate Ester

Electroactive Explosives: Nitrate Ester-Functionalized 1,2,4,5-Tetrazines

2013 ◽  
Vol 52 (27) ◽  
pp. 6876-6879 ◽  
Author(s):  
David E. Chavez ◽  
Susan K. Hanson ◽  
Jacqueline M. Veauthier ◽  
Damon A. Parrish
Keyword(s):  
Nitrate Ester

scholarly journals Modifying Nitrate Ester Sensitivity Properties Using Explosive Isomers

2019 ◽  
Vol 19 (11) ◽  
pp. 6708-6714 ◽  
Author(s):  
Nicholas Lease ◽  
Lisa M. Kay ◽  
Geoffrey W. Brown ◽  
David E. Chavez ◽  
Philip W. Leonard ◽  
...  
Keyword(s):  
Nitrate Ester

Identifying Thermal Decomposition Products of Nitrate Ester Explosives Using Gas Chromatography–Vacuum Ultraviolet Spectroscopy: An Experimental and Computational Study

2020 ◽  
Vol 74 (12) ◽  
pp. 1486-1495 ◽  
Author(s):  
Courtney A. Cruse ◽  
Jingzhi Pu ◽  
John V. Goodpaster
Keyword(s):  
Thermal Decomposition ◽  
Gas Chromatography ◽  
Density Functional ◽  
Vacuum Ultraviolet ◽  
Computational Study ◽  
Ultraviolet Spectroscopy ◽  
Decomposition Products ◽  
Nitrate Ester ◽  
Vacuum Ultraviolet Spectroscopy ◽  
Synchrotron Spectroscopy

Analysis of nitrate ester explosives (e.g., nitroglycerine) using gas chromatography–vacuum ultraviolet spectroscopy (GC–VUV) results in their thermal decomposition into nitric oxide, water, carbon monoxide, oxygen, and formaldehyde. These decomposition products exhibit highly structured spectra in the VUV that is not seen in larger molecules. Computational analysis using time-dependent density functional theory (TDDFT) was utilized to investigate the excited states and vibronic transitions of these decomposition products. The experimental and computational results are compared with those in previous literature using synchrotron spectroscopy, electron energy loss spectroscopy (EELS), photoabsorption spectroscopy, and other computational excited state methods. It was determined that a benchtop GC–VUV detector gives comparable results to those previously reported, and TDDFT could predict vibronic spacing and model molecular orbital diagrams.

Synthesis, hepatotoxic evaluation and antipyretic activity of nitrate ester analogs of the acetaminophen derivative SCP-1

2018 ◽  
Vol 28 (23-24) ◽  
pp. 3798-3801
Author(s):  
Madhurima Das ◽  
Surjyadipta Bhattacharjee ◽  
Frank R. Fronczek ◽  
Nicolas G. Bazan ◽  
Mark L. Trudell
Keyword(s):  
Nitrate Ester ◽  
Antipyretic Activity
Sign in / Sign up

Export Citation Format

Share Document