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US 8,932,458 B1Granted
Using a H2S scavenger during venting of the coke drum
AssigneeMarathon Petroleum Company LP
InventorsGary M. Gianzon, David T. Roland
Life of this patent
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Abstract
The delayed coking process comprises the steps of: thermally cracking hydrocarbon feedstock in the coke drum thereby converting the feedstock to coke and hydrocarbon products; routing thermally crack hydrocarbon products to downstream fractionators; and periodically removing coke out of the drum. Before coke removal, the drum has to be steam stripped, water quench, then vented. During venting, H2S scavenger is injected to the drum vapor space to remove residual H2S.
Claims14
A delayed coking process comprising the steps of:
- thermally cracking hydrocarbon feedstock in a coke drum thereby converting the feedstock to coke and hydrocarbon products;
- routing thermally cracked hydrocarbon products to downstream fractionators;
- periodically removing coke out of the drum;
- steam stripping the drum prior to removing the coke;
- water quenching the drum prior to removing the coke;
- venting the drum prior to removing the coke;
- and
- injecting hydrogen sulfide scavenger into a vapor space of the drum prior to venting to reduce hydrogen sulfide concentration.
5 more elements
Dependencies are inferred from the claim text.