Chemical incompatibility of nitrocompounds

Duh, Yih-Shing; Lee, Chyuan; Hsu, Chang-Chia; Hwang, Dong-Rong; Kao, Chen-Shan

doi:10.1016/s0304-3894(96)01829-8

Cited by 43 publications

(47 citation statements)

References 10 publications

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“…A simple way for thermal decomposition of nitric acid vapor has also been suggested in the literature [32,33] …”

Section: A Possible Mechanism For Thermal Decomposition Of Nitrated Tbpmentioning

confidence: 99%

“…The effect of concentration and temperature on the decomposition of equilibrated TBP has been studied. A detailed reaction mechanism for thermal decomposition of TBP-nitric acid was proposed on the basis of reaction products profile [29][30][31][32][33][34][35]. The data generated in these experiments can be useful to analyse pitfalls of vitrification process of radioactive waste after extraction process, namely, UREX, PUREX.…”

Section: Introductionmentioning

confidence: 99%

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Thermal Decomposition of Nitrated Tri-n-Butyl Phosphate in a Flow Reactor

Patil

Gaikar

Kumar

et al. 2012

ISRN Chemical Engineering

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Tri-n-butyl phosphate (TBP) is a universal nuclear extractant, commercially used in the PUREX process for the last 60 years. However, it is prone to nitration and thermal degradation, and as a consequence a red-oil event may be initiated under several operating conditions resulting in severe pressurization of vessel/cell if venting is inadequate. In this work, an attempt was made to understand the reaction pathway of thermal decomposition of nitrated TBP in a flow reactor at atmospheric pressure. Many reaction products were identified and quantified by instrumental methods like HPLC-RI and GC-TCD. The experimental data was analysed with a power law model and the apparent rate constants were estimated. The activation energy for thermal decomposition of nitrated TBP, assuming an Arrhenius type of temperature dependency, was estimated to be 47.39 ± 0.25 kJ·mol −1 . The effect of both varying temperature and concentration of nitric acid on conversion of TBP into degradation products and products distribution was experimentally studied. Based on the experimental observations, a reaction mechanism framework for thermal decomposition of nitrated TBP is proposed.

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“…A simple way for thermal decomposition of nitric acid vapor has also been suggested in the literature [32,33] …”

Section: A Possible Mechanism For Thermal Decomposition Of Nitrated Tbpmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Thermal Decomposition of Nitrated Tri-n-Butyl Phosphate in a Flow Reactor

Patil

Gaikar

Kumar

et al. 2012

ISRN Chemical Engineering

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“…Thermal decomposition of dinitrotoluenes was often examined with DSC analysis [7,[10][11][12][13][14], adiabatic reactionary calorimeter (ARC) was also used [10], and decomposition products were determined with the application of mass spectrometer [11]. The first stage of nitrocompounds decomposition differs depending on the substituents position in the aromatic ring.…”

Section: Introductionmentioning

confidence: 99%

“…Nitro-group in the neighborhood of methyl group leads to anthranil [16,17]. It is accepted that in case of ortho-nitrotoluenes, homolytic cleavage of C-H bond in the methyl group is the first stage of decomposition and in the second step hydrogen attaches oxygen atom in nitrogroup [10,18]. Then number of subsequent reaction take place which forms gaseous products.…”

Section: Introductionmentioning

confidence: 99%

The influence of substituents position on products of dinitrotoluene isomers initial thermal decomposition

Gołofit

Zielenkiewicz

2016

J Therm Anal Calorim

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Thermal decomposition of dinitrotoluene (DNT) isomers and formed products were studied. Initial stage of thermal decomposition was the field of interests because decomposition of even a few percent of a substance may cause hazard. The generation of impurities at the initial stage of decomposition was examined on the basis of the decrease of the original substance melting enthalpy and the increase of impurities fraction determined with cryometric method. MALDI TOF was used as the independent method of formed compounds molar masses determination. Samples of DNT isomers at raised temperature (up till 480 K) undergo aggregation leading to macromolecular substances. Regardless the substituents position, the initial phase of decomposition leads to same intermediate products. Mass spectra of DNT isomers thermally conditioned contain strong signals m/z, among others, 688, 1063, 1137, 1211. Thermogravimetric analysis revealed that observed difficulties with studying the decomposition initial stage are related to high vapor pressure below decomposition temperature, what especially concerns 2,6-DNT isomer.

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“…This energy is well below the lower bound energy of 1000 J/g for energetic compounds when they are screened by a DSC 6 instrument. 10 The exothermic decomposition is broad enough that the reaction does not meet the definition of a deflagration reaction.…”

mentioning

confidence: 99%

Thermal and Spectroscopic Analyses of Next Generation Caustic Side Solvent Extraction Solvent Contacted With 3, 8, and 16 Molar Nitric Acid

Fondeur¹,

Fink²

2011

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Chemical incompatibility of nitrocompounds

Cited by 43 publications

References 10 publications

Thermal Decomposition of Nitrated Tri-n-Butyl Phosphate in a Flow Reactor

Thermal Decomposition of Nitrated Tri-n-Butyl Phosphate in a Flow Reactor

The influence of substituents position on products of dinitrotoluene isomers initial thermal decomposition

Thermal and Spectroscopic Analyses of Next Generation Caustic Side Solvent Extraction Solvent Contacted With 3, 8, and 16 Molar Nitric Acid

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