Pyrolysis of Diglycidyl ether of Tetrabromobisphenol A (DGETBA) using molten salt and its reaction kinetics

Abstract

Diglycidyl ether of Tetrabromobisphenol A (DGETBA) is mainly for making copper clad laminate (CCL), which is the base of printed circuit board (PCB) in Taiwan. If not properly treated and disposed, waste printed circuit board would make the already polluted environment worse. The objective of this study is to pursue the chemical reaction kinetics for pyrolysis of DGETBA by molten salt. The molten salt used in this study composed of Sodium-nitrate (NaNO 3) and Sodium-nitrite (NaNO 2) with the ratio of 4:1. The following reaction rate equation has been obtained: dC/dt=-kC 0.7 , where k is the reaction rate constant, C is the reactant concentration, t is the reaction time, and which can further be obtained as follows: k=AT b exp (-E/RT)=33.9×T 0.00034 exp (-2118/1.987T), where A is a frequency factor (1/s), b is a empirical parameter temperature function, E is the activation energy (cal/mol), R is universal gas constant (1.987 cal/mol K), and T is the reaction temperature (K).