High temperature depressurization for naphtha mercaptan removal

Details High temperature depressurization for naphtha mercaptan removal High temperature depressurization for naphtha mercaptan removal

C - Chemistry, Metallurgy

10

G

C10G 45/06 (2006.01) C10G 45/02 (2006.01) C10G 45/08 (2006.01) C10G 65/04 (2006.01)

Patent

CA 2393753

The invention relates to naphtha hydrodesulfurization incorporating either high temperature depressurization or controlled heating for mercaptan removal. More particularly, the invention relates to a naphtha hydrodesulfurization process, wherein the hot naphtha exiting the desulfurization reactor (12) contains mercaptans, most of which are removed without olefin loss, by depressurizing the hot naphtha (14), thermally treating the hot naphtha, or some combination thereof. The desulfurized naphtha may be cooled and condensed to a liquid, separated (16) from the gaseous H2S, stripped and sent to a mogas pool.

L'invention concerne l'hydrodésulfuration de naphta comprenant soit une dépressurisation à haute température, soit une chauffage régulé pour l'élimination de mercaptans. D'une manière plus spécifique, l'invention concerne un procédé d'hydrodésulfuration de naphta, dans lequel le naphta chaud sortant du réacteur de désulfuration (12) contient des mercaptans, dont la plupart sont éliminés sans perte d'oléfines, par dépressurisation du naphta chaud (14), par traitement thermique du naphta chaud ou par une combinaison de ces procédés. Le naphta désulfuré peut être refroidi et condensé en un liquide, séparé du H2S gazeux, rectifié et envoyé dans un bassin d'essence.

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