Abstract
This article is intended to provide a bridge between a conservative view of safety, an understanding of the interactions and a certain degree of pragmatism in the evaluation of chemical reactions. Based on different reaction systems (esterification, decomposition and organic peroxide), practical experiences, so-called rules of thumb, are to be presented in the next chapters, which are appropriately proven in Evonik in the evaluation of chemical reactions. The focus is on adiabatic reaction calorimetry as well as the characteristics of temperature rise rate and time-to-maximum rate. Likewise, this contribution should also serve as an inspiration for others to share their experiences to develop a common understanding of safety engineering among stakeholders in a project.