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Calorimetric thermal hazards of tert - butyl hydroperoxide solutions / Yih-Wen Wang in Industrial & engineering chemistry research, Vol. 49 N° 19 (Octobre 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 19 (Octobre 2010) . - pp. 8959–8968 Titre : Calorimetric thermal hazards of tert - butyl hydroperoxide solutions Type de document : texte imprimé Auteurs : Yih-Wen Wang, Auteur ; Chi-Min Shu, Auteur Année de publication : 2010 Article en page(s) : pp. 8959–8968 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Thermal  instability  Hydroperoxide Résumé : Hazards evaluation was performed to investigate the thermal instability and incompatibility of tert-butyl hydroperoxide (TBHP) solution with various diluents. Two calorimeters, differential scanning calorimetry (DSC) and vent sizing package 2 (VSP2), are frequently used to characterize the inherent thermal hazards and adiabatic runaway features of organic peroxides. Through the thermal dynamic and isothermal scanning experiments, the enthalpy of energy-rich TBHP solutions to normalize various heats of decomposition was elucidated. The self-reactive rating of a runaway reaction can be characterized by the thermokinetic parameters, such as initial exothermic temperature (T0), self-heating rate (dT·dt−1), pressure rise rate (dP·dt−1), pressure−temperature profiles, noncondensable pressure, etc. We also suggested using the isothermal tests of DSC combined with the kinetic data to evaluate the exothermic enthalpy and reaction aging time of aqueous TBHP. The novel finding was that aqueous TBHP with DSC and VSP2 was observed to possess intrinsic qualities leading to thermal explosion, with a sharp self-reactive rate and pressure rise under adiabatic conditions. In summary, the thermal hazards of aqueous TBHP may cause a catastrophe or large loss in operation, storing, or transporting TBHP. This result also demonstrates that applying calorimetric methodology to classify the thermal hazards of organic peroxides is an alternative technology for research. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie1010355 [article] Calorimetric thermal hazards of tert - butyl hydroperoxide solutions [texte imprimé] / Yih-Wen Wang, Auteur ; Chi-Min Shu, Auteur . - 2010 . - pp. 8959–8968. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 19 (Octobre 2010) . - pp. 8959–8968 Mots-clés : Thermal  instability  Hydroperoxide Résumé : Hazards evaluation was performed to investigate the thermal instability and incompatibility of tert-butyl hydroperoxide (TBHP) solution with various diluents. Two calorimeters, differential scanning calorimetry (DSC) and vent sizing package 2 (VSP2), are frequently used to characterize the inherent thermal hazards and adiabatic runaway features of organic peroxides. Through the thermal dynamic and isothermal scanning experiments, the enthalpy of energy-rich TBHP solutions to normalize various heats of decomposition was elucidated. The self-reactive rating of a runaway reaction can be characterized by the thermokinetic parameters, such as initial exothermic temperature (T0), self-heating rate (dT·dt−1), pressure rise rate (dP·dt−1), pressure−temperature profiles, noncondensable pressure, etc. We also suggested using the isothermal tests of DSC combined with the kinetic data to evaluate the exothermic enthalpy and reaction aging time of aqueous TBHP. The novel finding was that aqueous TBHP with DSC and VSP2 was observed to possess intrinsic qualities leading to thermal explosion, with a sharp self-reactive rate and pressure rise under adiabatic conditions. In summary, the thermal hazards of aqueous TBHP may cause a catastrophe or large loss in operation, storing, or transporting TBHP. This result also demonstrates that applying calorimetric methodology to classify the thermal hazards of organic peroxides is an alternative technology for research. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie1010355

Thermally incompatible hazards of aqueous tert - butyl hydroperoxide with various acids/alkalis / Yih-Wen Wang in Industrial & engineering chemistry research, Vol. 51 N° 23 (Juin 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 23 (Juin 2012) . - pp. 7845-7852 Titre : Thermally incompatible hazards of aqueous tert - butyl hydroperoxide with various acids/alkalis Type de document : texte imprimé Auteurs : Yih-Wen Wang, Auteur Année de publication : 2012 Article en page(s) : pp. 7845-7852 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Hazard Résumé : Tert-butyl hydroperoxide (TBHP) is a typical alkyl hydroperoxide for industrial applications and is used as a curing agent or free radical initiator for polymerization reactions in the petrochemical industry. Thermal instability associated with the thermal runaway evaluation of aqueous TBHP is hazardous during chemical processes or in storage. In this study, both differential scanning calorimetry (DSC) and vent sizing package 2 (VSP2) were used to characterize the thermally incompatible hazards and adiabatic runaway features of aqueous TBHP with various acids and alkalis. From the thermal analysis experiments, we integrated the enthalpy of energy-rich aqueous TBHP reacting with acids and alkalis to normalize various temperatures of the exothermic decomposition and heat production. Self-reactive ratings on incompatibly thermal hazards were characterized using various thermokinetic parameters of the adiabatic calorimetry method, such as the initial exothermic temperature (To), self-heating rate (dT/dt), pressure rise rate (dP/dt), and pressure-temperature profiles. Compared to aqueous TBHP reacting with different contaminants, the adiabatic runaway reaction via VSP2 indicated that TBHP was intrinsically incompatible with self-reactive behaviors. The characterization of the exothermic decomposition and incompatibility hazards of aqueous TBHP were evaluated using calorimetric methodology. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25990297 [article] Thermally incompatible hazards of aqueous tert - butyl hydroperoxide with various acids/alkalis [texte imprimé] / Yih-Wen Wang, Auteur . - 2012 . - pp. 7845-7852. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 23 (Juin 2012) . - pp. 7845-7852 Mots-clés : Hazard Résumé : Tert-butyl hydroperoxide (TBHP) is a typical alkyl hydroperoxide for industrial applications and is used as a curing agent or free radical initiator for polymerization reactions in the petrochemical industry. Thermal instability associated with the thermal runaway evaluation of aqueous TBHP is hazardous during chemical processes or in storage. In this study, both differential scanning calorimetry (DSC) and vent sizing package 2 (VSP2) were used to characterize the thermally incompatible hazards and adiabatic runaway features of aqueous TBHP with various acids and alkalis. From the thermal analysis experiments, we integrated the enthalpy of energy-rich aqueous TBHP reacting with acids and alkalis to normalize various temperatures of the exothermic decomposition and heat production. Self-reactive ratings on incompatibly thermal hazards were characterized using various thermokinetic parameters of the adiabatic calorimetry method, such as the initial exothermic temperature (To), self-heating rate (dT/dt), pressure rise rate (dP/dt), and pressure-temperature profiles. Compared to aqueous TBHP reacting with different contaminants, the adiabatic runaway reaction via VSP2 indicated that TBHP was intrinsically incompatible with self-reactive behaviors. The characterization of the exothermic decomposition and incompatibility hazards of aqueous TBHP were evaluated using calorimetric methodology. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25990297