Method for safely and quickly shutting down and cleaning a hydroprocessing reactor of spent catalyst via a water flooding technique
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United States of America Patent
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Jan 17, 2017
Grant Date -
Dec 1, 2016
app pub date -
May 27, 2015
filing date -
May 27, 2015
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Abstract
Processes for shutting down a hydroprocessing reactor and for removing catalyst from the reactor may comprise shutting off hydrocarbon feed to the reactor, stripping hydrocarbons from the catalyst, cooling the reactor to a first threshold reactor temperature, purging the reactor with N2 gas, introducing water into the reactor, and dumping the catalyst from the reactor, wherein the first threshold reactor temperature may be substantially greater than 200° F. In an embodiment, the water may be introduced into the reactor via a quench gas distribution system when the reactor is at a second threshold reactor temperature not greater than 200° F. to cool the reactor to a third threshold reactor temperature not greater than 120° F.
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