Analysis of bromide volatilization behavior in the recycling of waste printed circuit boards.

Abstract

In this study, we investigated the bromination volatilization process with bromine in brominated flame retardants by using thermodynamic equilibrium calculations and experiments. The aim of the study is to achieve both the appropriate treatment of resins containing brominated flame retardants and the efficient recovery of valuable metals contained in WPCBs. In the experiments with metals and TBBPA, comparison with the results of the analysis showed that the reaction rate of the bromination reaction had to be considered. The results of the thermodynamic equilibrium calculations also confirmed that the bromination volatilization rate of each metal is affected by the coexisting elements.