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Published on 09/11/23
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A reactor in a slurry phase catalytic loop process for manufacturing high density polyethylene (HDPE) had been taken off-line to enable the removal of blockages from 3 product settling legs at the bottom of the reactor by specialist maintenance contractors. The day before the incident, the first leg was cleared without problems but the following day, a blockage in the partially dismantled second leg cleared suddenly and dumped almost the entire 40 tonne (88, 000 lb) reactor inventory to atmosphere in seconds. A huge vapour cloud formed which was ignited by an unidentified source and exploded.
Original content courtesy of IChemE Safety Centre
