Mineral oils: processes and products – Refining – Sulfur removal
Reexamination Certificate
2007-11-20
2007-11-20
Caldarola, Glen (Department: 1764)
Mineral oils: processes and products
Refining
Sulfur removal
C208S21600R, C208S2160PP, C208S217000, C208S213000
Reexamination Certificate
active
10424332
ABSTRACT:
A process for the selective hydrodesulfurization of naphtha streams containing a substantial amount of olefins and organically bound sulfur. The naphtha stream is selectively hydrodesulfurized by passing it through a first reaction zone containing a bed of a first hydrodesulfurization catalyst, then passing the resulting product stream through a second reaction zone containing a bed of a second hydrodesulfurization catalyst, which second hydrodesulfurization catalyst contains a lower level of catalytic metals than the first hydrodesulfurization catalyst.
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Brignac Garland B.
Cook Bruce R.
Demmin Richard A.
Ellis Edward S.
Greeley John P.
Caldarola Glen
Carter L. E.
Douglas John
Exxonmobil Research and Engineering Company
Naylor H. E.
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