Thermal hazard analysis for synthesis of tert-butyl peroxybenzoate

doi:10.16265/j.cnki.issn1003-3033.2017.11.015

Abstract

Abstract: For the sake of minimizing the thermal hazard of two step synthesis reaction of TBPB, an RC1e was used to study the effect of reactant amount on the reaction heat (ΔH_m), adiabatic temperature rise (ΔT_ad), and MTSR of the reaction. Gas chromatography was used to detect the yield of TBPB and the conversion rate of tert-butyl hydroperoxide (TBHP). The relationships between them and ΔH_m, ΔT_ad, and MTSR were analyzed. DSC was used to study the thermal decomposition characteristics of the products of the synthesis reaction of TBPB. Moreover, the possibility and severity of thermal decomposition were estimated for the products. Results show that ΔH_m, ΔT_ad, and MTSR of the second step in the synthesis reaction are higher than those in the first step, that increasing in benzoyl chloride can enhance ΔH_m, ΔT_ad, and MTSR, that excess of benzoyl chloride can reduce the yield and increase the thermal hazard of the reaction, and that an increase in benzoyl chloride, can reduce the possibility and severity of thermal decomposition of the products in the second step.

Key words: reaction calorimeter (RC1e), tert-butyl peroxybenzoate (TBPB), gas chromatography, differential scanning calorimetry (DSC), thermal hazard, maximum temperature of the synthesis reaction (MTSR)

CLC Number:

X937

CUI Fusheng, JIANG JunCHENG, ZHANG Wenxing, NI Lei, JIANG Jiajia. Thermal hazard analysis for synthesis of tert-butyl peroxybenzoate[J]. China Safety Science Journal, 2017, 27(11): 85-90.

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