Mineral oils: processes and products – Refining – Sulfur removal
Reexamination Certificate
2005-11-23
2008-09-02
Nguyen, Tam M. (Department: 1797)
Mineral oils: processes and products
Refining
Sulfur removal
C208S210000, C208S211000, C208S212000, C208S21600R, C208S217000, C208S218000
Reexamination Certificate
active
07419586
ABSTRACT:
A process for the selective hydrodesulfurization of olefinic naphtha streams containing a substantial amount of organically-bound sulfur and olefins. The olefinic naphtha stream is selectively desulfurized in a first hydrodesulfurization stage. The effluent stream from this first stage is sent to a separation zone wherein a lower boiling naphtha stream and a higher boiling naphtha stream are produced. The lower boiling naphtha stream is sent through at least two more separation zones, each at a lower temperature than the preceding separation stage. The higher boiling naphtha stream, which contains most of the sulfur moieties, is passed to a second hydrodesulfurization stage wherein at least a fraction of the sulfur moieties are removed.
REFERENCES:
patent: 5114562 (1992-05-01), Haun et al.
patent: 5968347 (1999-10-01), Kolodziej et al.
patent: 5985136 (1999-11-01), Brignac et al.
patent: 6013598 (2000-01-01), Lapinski et al.
patent: 6126814 (2000-10-01), Lapinski et al.
patent: 6231753 (2001-05-01), McKnight et al.
patent: 6592750 (2003-07-01), Podrebarac et al.
patent: 6676829 (2004-01-01), Angevine et al.
patent: 6855246 (2005-02-01), Chapus et al.
patent: 6913688 (2005-07-01), Coker et al.
patent: 6972086 (2005-12-01), Didillon et al.
patent: 03/044131 (2003-05-01), None
Ariyapadi Murali V.
Ellis Edward S.
Greeley John P.
Patel Vasant
Carter Lawrence E.
ExxonMobil Research and Engineering Company
Nguyen Tam M.
LandOfFree
Two-stage hydrodesulfurization of cracked naphtha streams... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Two-stage hydrodesulfurization of cracked naphtha streams..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Two-stage hydrodesulfurization of cracked naphtha streams... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3988013