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Thermal reactive hazards of 1,1-bis( tert -butylperoxy)cyclohexane with nitric acid contaminants by DSC

With two active O–O peroxide groups, 1,1-bis( tert -butylperoxy)cyclohexane (BTBPC) has a certain degree of thermal instability. It is usually used as an initiator in chemical processes, and therefore reckless operation may result in serious thermal accidents. This study focused on the runaway react... Full description

Journal Title: Journal of Thermal Analysis and Calorimetry 2012, Vol.109(3), pp.1253-1260
Main Author: Hsueh, Kuang-Hua
Other Authors: Chen, Wei-Ting , Chu, Yung-Chuan , Tsai, Lung-Chang , Shu, Chi-Min
Format: Electronic Article Electronic Article
Language: English
Subjects:
Quelle: Springer Science & Business Media B.V.
ID: ISSN: 1388-6150 ; E-ISSN: 1572-8943 ; DOI: 10.1007/s10973-012-2338-y
Link: http://dx.doi.org/10.1007/s10973-012-2338-y
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recordid: springer_jour10.1007/s10973-012-2338-y
title: Thermal reactive hazards of 1,1-bis( tert -butylperoxy)cyclohexane with nitric acid contaminants by DSC
format: Article
creator:
  • Hsueh, Kuang-Hua
  • Chen, Wei-Ting
  • Chu, Yung-Chuan
  • Tsai, Lung-Chang
  • Shu, Chi-Min
subjects:
  • 1,1-Bis(-butylperoxy)cyclohexane (BTBPC)
  • Curve-fitting method
  • Differential scanning calorimetry (DSC)
  • Nitric acid
  • Thermokinetic parameters
ispartof: Journal of Thermal Analysis and Calorimetry, 2012, Vol.109(3), pp.1253-1260
description: With two active O–O peroxide groups, 1,1-bis( tert -butylperoxy)cyclohexane (BTBPC) has a certain degree of thermal instability. It is usually used as an initiator in chemical processes, and therefore reckless operation may result in serious thermal accidents. This study focused on the runaway reactions of BTBPC alone and mixed with various concentrations of nitric acid (1, 2, 4, and 8 N). The essential thermokinetic parameters, such as exothermic onset temperature ( T o ), activation energy ( E a ), frequency factor ( A ), time to maximum rate under adiabatic condition (TMR ad ) and time to conversion limit (TCL), were evaluated by differential scanning calorimetry at the heating rate of 4 °C min −1 , and a kinetics-based curve fitting method was used to assess the thermokinetic parameters. All the results indicated that BTBPC mixed with one more than 4 N nitric acid dramatically increased the degree of thermal hazard in the exothermic peak and became more dangerous. However, it was relatively safe for BTBPC mixed with less than 1 N nitric acid under 34.5 °C.
language: eng
source: Springer Science & Business Media B.V.
identifier: ISSN: 1388-6150 ; E-ISSN: 1572-8943 ; DOI: 10.1007/s10973-012-2338-y
fulltext: fulltext
issn:
  • 1572-8943
  • 15728943
  • 1388-6150
  • 13886150
url: Link


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titleThermal reactive hazards of 1,1-bis( tert -butylperoxy)cyclohexane with nitric acid contaminants by DSC
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subject1,1-Bis(-butylperoxy)cyclohexane (BTBPC) ; Curve-fitting method ; Differential scanning calorimetry (DSC) ; Nitric acid ; Thermokinetic parameters
descriptionWith two active O–O peroxide groups, 1,1-bis( tert -butylperoxy)cyclohexane (BTBPC) has a certain degree of thermal instability. It is usually used as an initiator in chemical processes, and therefore reckless operation may result in serious thermal accidents. This study focused on the runaway reactions of BTBPC alone and mixed with various concentrations of nitric acid (1, 2, 4, and 8 N). The essential thermokinetic parameters, such as exothermic onset temperature ( T o ), activation energy ( E a ), frequency factor ( A ), time to maximum rate under adiabatic condition (TMR ad ) and time to conversion limit (TCL), were evaluated by differential scanning calorimetry at the heating rate of 4 °C min −1 , and a kinetics-based curve fitting method was used to assess the thermokinetic parameters. All the results indicated that BTBPC mixed with one more than 4 N nitric acid dramatically increased the degree of thermal hazard in the exothermic peak and became more dangerous. However, it was relatively safe for BTBPC mixed with less than 1 N nitric acid under 34.5 °C.
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titleThermal reactive hazards of 1,1-bis( tert -butylperoxy)cyclohexane with nitric acid contaminants by DSC
descriptionWith two active O–O peroxide groups, 1,1-bis( tert -butylperoxy)cyclohexane (BTBPC) has a certain degree of thermal instability. It is usually used as an initiator in chemical processes, and therefore reckless operation may result in serious thermal accidents. This study focused on the runaway reactions of BTBPC alone and mixed with various concentrations of nitric acid (1, 2, 4, and 8 N). The essential thermokinetic parameters, such as exothermic onset temperature ( T o ), activation energy ( E a ), frequency factor ( A ), time to maximum rate under adiabatic condition (TMR ad ) and time to conversion limit (TCL), were evaluated by differential scanning calorimetry at the heating rate of 4 °C min −1 , and a kinetics-based curve fitting method was used to assess the thermokinetic parameters. All the results indicated that BTBPC mixed with one more than 4 N nitric acid dramatically increased the degree of thermal hazard in the exothermic peak and became more dangerous. However, it was relatively safe for BTBPC mixed with less than 1 N nitric acid under 34.5 °C.
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abstractWith two active O–O peroxide groups, 1,1-bis( tert -butylperoxy)cyclohexane (BTBPC) has a certain degree of thermal instability. It is usually used as an initiator in chemical processes, and therefore reckless operation may result in serious thermal accidents. This study focused on the runaway reactions of BTBPC alone and mixed with various concentrations of nitric acid (1, 2, 4, and 8 N). The essential thermokinetic parameters, such as exothermic onset temperature ( T o ), activation energy ( E a ), frequency factor ( A ), time to maximum rate under adiabatic condition (TMR ad ) and time to conversion limit (TCL), were evaluated by differential scanning calorimetry at the heating rate of 4 °C min −1 , and a kinetics-based curve fitting method was used to assess the thermokinetic parameters. All the results indicated that BTBPC mixed with one more than 4 N nitric acid dramatically increased the degree of thermal hazard in the exothermic peak and became more dangerous. However, it was relatively safe for BTBPC mixed with less than 1 N nitric acid under 34.5 °C.
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pubSpringer Netherlands
doi10.1007/s10973-012-2338-y
date2012-09