Patent ID: 8419931
Filing Date: 2013-04-16
Classification: B01D,C10B,C10G

Abstract:
1. A method for precluding foam-over during a petroleum coking operation comprising: filling a coke drum with a coke feedstock; monitoring the coke feedstock level within said coke drum; stopping flow of coke feedstock when said feedstock occupies from about 66% to about 80% of the internal volume of said coke drum; when said coke drum is filled between about 60% to about 70% of its total internal capacity and prior to stopping the flow of feedstock, injecting into said coke drum from about 0.03 gallons to about 0.5 gallons of a non-silicone anti-foam agent per barrel of feedstock entering said drum thereby precluding a foam layer on the surface of said feedstock from entering an overhead line carried by said coke drum; wherein said non-silicone anti-foam agent is selected from the group consisting of tire oil having an aromatic concentration by weight greater than 70% and a slurry oil having an aromatic concentration by weight greater than 70%.