Mineral oils: processes and products – Chemical conversion of hydrocarbons – Cracking
Reexamination Certificate
2011-01-18
2011-01-18
Hill, Jr., Robert J (Department: 1797)
Mineral oils: processes and products
Chemical conversion of hydrocarbons
Cracking
C208S0480AA, C208S20800M
Reexamination Certificate
active
07871511
ABSTRACT:
A method for altering coke morphology in a delayed coking process of heavy oil is provided. An effective amount of one or more oil dispersible or oil soluble polynuclear aromatic compounds, or functionalized lignin, is added or contacted with the resid or heavy oil at a point before or after the step of heating the heavy oil to coking temperatures. The addition of additives facilitates the formation of shot coke and inhibits the formation of sponge coke.
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patent: 2005/0258070 (2005-11-01), Varadaraj et al.
patent: 2005/0279672 (2005-12-01), Varadaraj et al.
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patent: 2009/0184029 (2009-07-01), Varadaraj et al.
Brown Leo D.
Siskin Michael
Varadaraj Ramesh
Barrett Glenn T.
ExxonMobil Research & Engineering Co.
Hill, Jr. Robert J
Keen Malcolm D.
McCaig Brian
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