As a result of a two‐year joint effort between the National Oceanic and Atmospheric Administration (NOAA) and The Dow Chemical Company, an enhanced version (3.0) of the NOAA Chemical Reactivity Worksheet now is available. In addition to addressing previously identified limitations with version 2.0 of this tool, several enhancements have been incorporated into the tool to help with the generation and presentation of chemical compatibility charts. This article covers the development and use of this new tool, highlighting the enhancements that position this tool to become the gold standard within the chemical industry for determining chemical compatibility. © 2013 American Institute of Chemical Engineers Process Saf Prog 33: 4–18, 2014
A serious upset in process conditions may result in a Reactive Chemicals incident. In such an emergency, procedures must be implemented to prevent injuries, mitigate the event and minimize property loss and/or environmental release as dictated by the required facility Emergency Plan. This article describes the process the Dow Chemical Company uses for engaging Reactive Chemicals experts in an emergency situation. In order to be effective, the Reactive Chemicals expert must have or be provided with in‐depth knowledge of the process streams and raw materials involved. The information is crucial for understanding what is happening, what might happen in the immediate future, and what can be done to successfully mitigate the Reactive Chemicals incident. Following the incident, calorimetric experiments are typically performed to confirm or refute the hypotheses of what caused the event; additionally, the experiments provide information as to reactive chemicals hazards that may potentially still exist in the process streams. The aforementioned process will be illustrated by describing an actual event. Useful methods are described and recommended for (a) characterizing and storing reactive chemicals, and (b) responding and mitigating safety incidents with reactive chemicals. The role of a reactive chemicals “expert” during and after a plant emergency is important and potentially critical to the safe handling of an ongoing event and also in determining the root cause of the incident. © 2009 American Institute of Chemical Engineers Process Saf Prog, 2010
To increase its capacity, a production plant investigated raising the operating temperature of a wiped-film evaporator (WFE) unit. The WFE separates a high-boilingproduct (taken overhead) from a heavy tar stream (taken out the bottom). Both product and tars begin to decompose at temperatures near the operating temperature of the WFE. The plant's Management of Change procedure required that all potential reactivity hazards be considered before making the proposed change. This paper describes the experimental work done on plant samples with ARC and Setaram C-80 instruments, and how decomposition kinetic parameterswere estimated using thermal safety software from Cheminform St. Petenburg, Ltd. The results of this hazard evaluation allowed the plant personnel to make an informed decision about the proposed operating change.
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