Safe unloading and disposal of ionic liquid catalyst contaminated spent solids
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United States of America Patent
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Aug 21, 2018
Grant Date -
Dec 1, 2016
app pub date -
May 27, 2015
filing date -
May 27, 2015
priority date (Note) -
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Abstract
Processes for shutting down a regeneration reactor and for removing spent solid from the regeneration reactor may comprise shutting off a feed comprising an ionic liquid to the regeneration reactor, cooling the regeneration reactor, removing at least a portion of the ionic liquid from the regeneration reactor, purging the regeneration reactor with N2 gas, introducing water into the regeneration reactor to form an acidic liquid in the regeneration reactor, and dumping the acidic liquid and the spent solid from the regeneration reactor. The acidic liquid may be neutralized with a basic liquid to provide a neutralized liquid. The spent solid may be separated from the neutralized liquid. In an embodiment, noble metal(s) may be recovered from the spent solid.
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