blocked operation

blocked operation

[′bläkt äp·ə′rā·shən]
(chemical engineering)
The use of a single chemical or refinery process unit alternately in more than one operation; for example, a catalytic reactor will first produce a chemical product and then will be blocked from the main process stream during catalyst regeneration.
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References in periodicals archive ?
The output in the previous week was under 450,000 b/d - from 1m b/d at one time in June 2013 when various militia groups seeking power since Qadhafi's October 2011 death blocked operations at the terminals.
Earlier on June 8, 2009, several communities surrounding the Orcopampa mine had demanded direct negotiations with the company on issues regarding community and environmental issues, as well as labour claims, and had blocked operations at the Orcopampa mine.
45m b/d - up from under 1m b/d at one time in June, when various militia groups still vying for power since Qadhafi's October 2011 death blocked operations at terminals on the Mediterranean coast.