Rohm and Haas is a chemical manufacturing company, a subsidiary of Dow chemical company employing more than 17,000 people in 27 countries. Rohm and Haas had a bromine delivery system that needed tank and structural support repair to remain in service safely. The existing bromine receiving and dispensing facility is shown in Figure 1. Bromine is a toxic liquid that through liquid contact or vapour inhalation can be fatal, and proper safeguards for dispensing and storage are necessary. The company decided to revise the bromine delivery method and improve the safety of the design by modification of the current system as an alternative to repair. In order to ensure the safety of the new system, an inherently safer design approach was used. This is a practice that reduces or eliminates hazards and it is most effective in the early stages of development and plant design process. However, it can also be applied to an existing facility.
As part of a design proposal, a schematic for a new bromine delivery system is required. The design must ensure principles of inherently safer design are followed. Also, risk analysis on the existing design must be performed by considering different release scenarios based on the current system.
The case has the following learning objectives: inherently safer design, process safety, and quantitative risk analysis. The case is applicable in ChE 100 (Chemical Engineering Concepts 1) as a conceptual design case. The case is also applicable for ChE 480 (Process Analysis and Design) and ChE 482 (Chemical Engineering Design Workshop) where process safety is a topic. In addition, the case could be used in ChE 572 (Air Pollution Control) for dispersion modeling. The case study could be used during lecture time or as an assignment.