Thermal Hazards Evaluation on the Manufacturing of LPO by DSC for Environment Protection in Material Engineering and its Application

2012 ◽  
Vol 600 ◽  
pp. 75-79 ◽  
Author(s):  
Mei Li You ◽  
Tung Feng Hsieh
Keyword(s):  
Hydrogen Peroxide ◽  
Differential Scanning Calorimetry ◽  
Phosphorus Trichloride ◽  
Environment Protection ◽  
Sodium Peroxide ◽  
Scanning Calorimetry ◽  
Retrospective Case ◽  
Thermal Hazards ◽  
Model Simulations ◽  
Lauroyl Peroxide

Lauroyl chloride is synthesized by the reaction of phosphorus trichloride and lauroyl acid. It is, in turn, oxidized by a toluene solution of hydrogen peroxide and sodium peroxide to manufacture lauroyl peroxide (LPO). As a retrospective case, a cleaning drum exploded during transfer of the toluene layer including LPO to the filter after separation of the aqueous phase. It is speculated that plant managers did not fully apprehend the hazardous decomposition of LPO, or could not make operators understand it. This study investigated the reaction hazards in the manufacturing process to forestall explosion in the manufacturing of LPO by differential scanning calorimetry (DSC) and TSS model simulations.

scholarly journals Significance of Theoretical Decomposition Enthalpies for Predicting Thermal Hazards

2015 ◽  
Vol 2015 ◽  
pp. 1-12 ◽  
Author(s):  
Didier Mathieu
Keyword(s):  
Differential Scanning Calorimetry ◽  
Nitroaromatic Compounds ◽  
Present Approach ◽  
Quantitative Structure ◽  
Structure Property ◽  
Scanning Calorimetry ◽  
Thermal Hazards ◽  
Structure Property Relationships ◽  
Quantitative Structure Property Relationships ◽  
Decomposition Enthalpy

Much effort is currently put into the development of models for predicting decomposition enthalpies measured using differential scanning calorimetry (DSC). As an alternative to the purely empirical schemes reported so far, this work relies on theoretical values obtained on the basis of simple assumptions. For nitroaromatic compounds (NACs) studied in sealed sample cells, our approach proves clearly superior to previous ones. In contrast, it correlates poorly with data measured in pin-hole sample cells. Progress might be obtained through a combination of the present approach with the usual Quantitative Structure-Property Relationships (QSPR) methodologies. This work emphasizes the significance of the theoretical decomposition enthalpy as a fundamental descriptor for the prediction of DSC values. In fact, the theoretical value provides a valuable criterion to characterize thermal hazards, as a complement to experimental decomposition temperatures.

Thermal Stability of N-Heterocycle-Stabilized Iodanes – A Systematic Investigation

2019 ◽  
Author(s):  
Andreas Boelke ◽  
Yulia A. Vlasenko ◽  
Mekhman S. Yusubov ◽  
Boris Nachtsheim ◽  
Pavel Postnikov
Keyword(s):  
Thermal Stability ◽  
Differential Scanning Calorimetry ◽  
Thermogravimetric Analysis ◽  
Systematic Investigation ◽  
Scanning Calorimetry ◽  
Thermal Stability Of

<p>The thermal stability of pseudocyclic and cyclic <i>N</i>-heterocycle-stabilized (hydroxy)aryl- and mesityl(aryl)-l<sup>3</sup>-iodanes (NHIs) through thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) is investigated. NHIs bearing <i>N</i>-heterocycles with a high N/C-ratio such as triazoles show among the lowest descomposition temperatures and the highest decomposition energies. A comparison of NHIs with known (pseudo)cyclic benziodoxolones is made and we further correlated their thermal stability with reactivity in a model oxygenation. </p>

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