Ascend Performance Materials reported a waste heat boiler tripped at its acrylonitrile plant in Chocolate Bayou, Texas today, causing off-gas to vent to the atmosphere, according to a filing with the Texas Commission on Environmental Quality.
Acrylonitrile, propylene and hydrogen cyanide were released during the upset. The boiler was subsequently restarted and the off-gases were reintroduced to the boiler.
The Chocolate Bayou plant can produce a total of 1.029mn lb/yr of acrylonitrile. A similar incident occurred at the plant on 13 December.
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