Mineral oils: processes and products – Refining – Sulfur removal
Reexamination Certificate
2006-12-26
2006-12-26
Caldarola, Glann (Department: 1764)
Mineral oils: processes and products
Refining
Sulfur removal
C208S212000, C208S238000
Reexamination Certificate
active
07153415
ABSTRACT:
A light cracked naphtha is treated to convert mercaptans to sulfides and saturate dienes and then subjected to destructive hydrodesulfurization (HDS) to convert the organic sulfur compounds to hydrogen sulfide. The recombinant mercaptans formed by reaction of hydrogen sulfide and olefins at the outlet of the HDS are generally heavier than the light cracked naphtha is fractionated in admixture with a heavy cracked naphtha. A low sulfur content light cracked naphtha is produced as an overheads and the major portion of the mercaptans leave with heavy cracked naphtha as bottoms. It also advantageous to pass the heavy cracked naphtha through the HDS in admixture with the light cracked naphtha, since the recombinant mercaptans formed with the heavy cracked naphtha olefins (which displace some of the lower mercaptans which would form the light cracked naphtha olefins) will be even higher boiling and easier to separate by fractionation.
REFERENCES:
patent: 2901417 (1959-08-01), Cook et al.
patent: 2958654 (1960-11-01), Honeycutt
patent: 3475327 (1969-10-01), Eng
patent: 3957625 (1976-05-01), Orkin
patent: 5906730 (1999-05-01), Hatanaka et al.
patent: 6083378 (2000-07-01), Gildert et al.
patent: 6126814 (2000-10-01), Lapinski et al.
patent: 6231753 (2001-05-01), McKnight et al.
patent: 6303020 (2001-10-01), Podrebarac et al.
patent: 6440299 (2002-08-01), Hearn et al.
patent: 6444118 (2002-09-01), Podrebarac et al.
patent: 6495030 (2002-12-01), Podrebarac
patent: 2002/0175108 (2002-11-01), Debuisschert et al.
patent: WO 200179391 (2001-10-01), None
Almering Martinus J.
Groten Willibrord A.
Podrebarac Gary G.
Som Manoj
Caldarola Glann
Catalytic Distillation Technologies
Douglas John
Johnson Kenneth H.
LandOfFree
Process for the treatment of light naphtha hydrocarbon 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 Process for the treatment of light naphtha hydrocarbon streams, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the treatment of light naphtha hydrocarbon streams will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3657280