THE PREPARATION OF BIS-NITROXYETHYLNITROÖXAMIDE

1948 ◽  
Vol 26b (4) ◽  
pp. 401-414 ◽  
Author(s):  
R. S. Stuart ◽  
George F. Wright
Keyword(s):  
Oxalic Acid ◽  
High Explosive ◽  
Health Hazard ◽  
Continuous Process ◽  
Decomposition Products ◽  
Economical Method ◽  
Acetone Water ◽  
Crude Product ◽  
Water Crystallization ◽  
Industrial Health

An economical method is described for preparation of the explosive bis-nitroxyethylnitroöxamide from oxalic acid and monoethanolamine. Yields over 80% of theoretical may be obtained from bis-hydroxyethyloxamide by either batch or continuous process. The crude product must be purified before use by acetone-water crystallization. The formation of this explosive is found to be inhibited by nitrosylsulphuric acid which limits the nitration to the bis-nitroxyethyloxamide stage. The complete reaction is thought to proceed via this intermediate by a nonreversible nitration and then to decompose reversibly, if allowed to proceed too long, to bis-hydroxyethylnitroöxamide. There is some evidence that the explosive is stabilized by its decomposition products. The use of this high explosive does not present the industrial health hazard caused by tetryl, with which it is comparable in power and brisance. Furthermore, it has the advantage over tetryl that it can be melted and poured. The solidified melt is unique among explosives because it is free from gross cavities.

Vocal Cord Dysfunction — An Industrial Health Hazard

1979 ◽  
Vol 88 (6) ◽  
pp. 818-821 ◽  
Author(s):  
Eugene Rontal ◽  
Michael Rontal ◽  
H. J. Jacob ◽  
Michael I. Rolnick
Keyword(s):  
At Risk ◽  
Vocal Cord ◽  
Health Hazard ◽  
Environmental Noise ◽  
Vocal Cord Dysfunction ◽  
Noise Levels ◽  
High Noise ◽  
Chronic Laryngitis ◽  
Industrial Health

Vocal cord dysfunction has a definite incidence of association with high environmental noise levels. Our study has shown roughly an 8% incidence of vocal cord dysfunction (vocal cord nodules, vocal cord polyps and chronic laryngitis) in individuals working in high noise environments. In addition, those individuals who have surgery for vocal cord nodules and who work in high noise environments will have over a 30% incidence of recurrent vocal cord dysfunction following surgery. Our study indicates that females tend to be more at risk in high noise environments than males.

scholarly journals Averrhoa carambola: A Renewable Source of Oxalic Acid for the Facile and Green Synthesis of Divalent Metal (Fe, Co, Ni, Zn, and Cu) Oxalates and Oxide Nanoparticles

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Nguimezong Nguefack Marius Borel ◽  
Josepha Foba-Tendo ◽  
Divine Mbom Yufanyi ◽  
Ekane Peter Etape ◽  
Jude Namanga Eko ◽  
...  
Keyword(s):  
Oxalic Acid ◽  
Metal Oxide Nanoparticles ◽  
Environmentally Benign ◽  
Effect Of Temperature ◽  
Special Treatment ◽  
Oxide Nanoparticles ◽  
Synthetic Approach ◽  
X Ray Diffraction ◽  
Decomposition Products ◽  
Averrhoa Carambola

A green, simple, and environmentally benign synthetic approach has been utilised to obtain some bivalent metal oxalates from Averrhoa carambola juice extract, without any purification or special treatment of the juice. The main acid components (oxalic acid and ascorbic acid) of the juice were identified by HPLC technique. The effect of temperature on the purity of the product has been investigated. The as-synthesized metal oxalates were thermally decomposed at low temperatures to their respective metal oxide nanoparticles. The metal oxalates and their respective thermal decomposition products were characterized by Fourier Transform Infrared spectroscopy, X-ray diffraction analysis, and thermogravimetry.

scholarly journals Komplexchemie polyfunktioneller Liganden, 52 [1]. Hydrido- und Deuterido-mangan(I)-carbonyl-Komplexe des 1.1.1- Tris (diphenylphosphinomeihy 1) ethans / Complex Chemistry of Polyfiinctional Ligands, 52 [1]. Hydrido- and Deuterido-manganese(I)-carbonyl Complexes of 1,1,1 -Tris(diphenylphosphinomethyl)ethane

1979 ◽  
Vol 34 (6) ◽  
pp. 799-804 ◽  
Author(s):  
Jochen Eilermann ◽  
Helmut A. Lindner
Keyword(s):  
Uv Irradiation ◽  
Methyl Alcohol ◽  
Ultraviolet Irradiation ◽  
Nmr Spectra ◽  
Carbonyl Complexes ◽  
Decomposition Products ◽  
H Nmr ◽  
Acetone Water ◽  
Complex Chemistry ◽  
New Compounds

[Mn(CO)3(R2PCH2)3CCH3]ClO4 (1a) (R = C6H5) reacts with NaBH4 on UV irradiation to yield HMn(CO)2(R2PCH2)3CCH3 (2a). [Mn(CO)3(R2PCH2)3CCH3]BR4 (1b) gives only decomposition products. Boiling of 1a or b and NaOH in acetone/water does nots give 2a but the new hydride HMn(CO)3(R2PCH2)2C(CH3)CH2PR2 (3a). This compound cannot be prepared on ultraviolet irradiation of a solution of 1a or b and NaBH4 in methyl alcohol or acetone. The analogous deutendes DMn(CO)2(R2)PCH2)3CCH3 (2b) and DMn(CO)3(R2PCH2)2C(CH3)CH2PR2 (3b) were also prepared. The new compounds were characterized by their IR, Raman, 1H NMR and 31P NMR spectra.

Recovery of Lanthanides from Indonesian Low Grade Bauxite Using Oxalic Acid

2018 ◽  
Vol 929 ◽  
pp. 171-176 ◽  
Author(s):  
Eny Kusrini ◽  
Zakaria Jaka Bahari ◽  
Anwar Usman ◽  
Arif Rahman ◽  
Eko Adi Prasetyanto
Keyword(s):  
Rare Earth ◽  
Optimum Condition ◽  
Oxalic Acid ◽  
Rare Earth Elements ◽  
Acid Leaching ◽  
Experimental Result ◽  
Low Grade ◽  
Icp Oes ◽  
Temperature Dependent ◽  
Economical Method

The present work describes the extraction of lanthanide (rare earth elements, REE) from low grade bauxite using acid leaching method. The aim of this study is to obtain the best condition for extraction of lanthanides from low grade bauxite. The effect of different parameters such as temperatures and concentration of oxalic acid in leaching process were investigated. The content of La, Ce and Y elements were determined using ICP-OES. The experimental result shows that the efficiencies of lanthanide leaching are the temperature-dependent. Increasing leaching temperature from 45°C to 85°C did not improve recoveries of lanthanides. The most optimum condition was found at oxalic acid leaching of 1 mol/L, leaching temperature at 40°C, and time for 2 hours. The obtained results show that the lanthanides can be leached using oxalic axid. This finding may lead to more effective and economical method to separate lanthanides from low grade bauxite.

Reactions of N-Acyloxy-2-nitrobenzenamines. I. Thermolysis in Benzene or Bromobenzene

1989 ◽  
Vol 42 (12) ◽  
pp. 2275 ◽  
Author(s):  
IR Bryant ◽  
LK Dyall
Keyword(s):  
Thermal Decomposition ◽  
Carboxylic Acid ◽  
Acid Anhydride ◽  
The Other ◽  
Decomposition Products ◽  
Elimination Process ◽  
Crude Product ◽  
Thermal Decomposition Products ◽  
Azoxy Compound ◽  
Derivatives Of

N-Acyloxy-2-nitro- and N-acyloxy-2,4-dinitro-benzenamines have been pyrolysed at 140� in benzene or bromobenzene solution. Homolysis (to form RCO2 and ArNH ) is ruled out since virtually all the carboxylate is isolated as carboxylic acid. This acid might arise via a concerted elimination process (the other product being a benzofurazan 1-oxide), or via heterolysis to ArNH+, RCO2- with subsequent transfer of proton, and cyclization of the singlet 2-nitrophenylnitrene. These simple reactions compete with bimolecuiar reactions of products with substrate, in which the corresponding amine, azoxy compound and acid anhydride are generated. Attempts to synthesize N-tosyloxy derivatives of nitrobenzenamines gave only thermal decomposition products. N-Trifluoroacetoxy-2,4-dinitrobenzenamine was isolated as a crude product which detonated violently.

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