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 ?
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.