Method for improving liquid yield in a delayed coking process
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United States of America Patent
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Issued Date -
May 6, 2010
app pub date -
Oct 14, 2009
filing date -
Nov 6, 2008
priority date (Note) -
Abandoned
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Abstract
A system and method for removing oil from the surface of coke left in refinery coke drums before it is cut out is disclosed. The process does not add time to the coking cycle, nor involve the addition of major equipment. A solvent is added to the stripping steam. The solvent could be either a hydrocarbon fraction such as a coker distillate, a light gas oil or another fraction having an end point below 450° C. The solvent-enhanced stripping steam becomes a very effective oil extraction vapor when injected into the coke drum.
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