Process for reducing the level of sulfur compounds from...

Details Process for reducing the level of sulfur compounds from... Process for reducing the level of sulfur compounds from...

C - Chemistry, Metallurgy

10

G

C10G 67/06 (2006.01) B01D 3/38 (2006.01) B01D 53/14 (2006.01) B01D 53/52 (2006.01)

Patent

CA 2520046

A refined petroleum feedstock, such as diesel fuel, containing a low concentration of sulfur contaminants (such as would be taken up during pipeline conveyance), is desulfurized in a hydrotreating process characterized by mild conditions. Gaseous H2 is added to the feedstock in a ratio in the range of 0.5-25 SCM/SCM. The mixture is treated in a catalytic reactor at a temperature in the range 140 - 330°C and a pressure in the range 3 - 60 bar absolute, to convert contaminants to gaseous H2S. Produced gaseous H2 and H2S are separated from the liquid hydrocarbons. The gas mixture is scrubbed with liquid absorbent to remove H2S and purified H2 is recycled.

Une charge d'alimentation de pétrole raffiné, tel que du carburant diesel, contenant une faible concentration de contaminants soufrés (qui pourraient s'accumuler par exemple au cours du transport par pipeline) est désulfurée grâce à un procédé d'hydrotraitement caractérisé par des conditions douces. Du H2 gazeux est ajouté à la charge d'alimentation dans un rapport de l'ordre de 0,5-25 MCS/MCS. Le mélange est traité dans un réacteur catalytique à une température dans la gamme de 140 à 330 oC et à une pression dans la gamme de 3 à 60 bars (absolus) pour convertir les contaminants en H2S gazeux. Le H2 et le H2S gazeux produits sont séparés des hydrocarbures liquides. Le mélange gazeux est soumis à un lavage sur un absorbant liquide pour éliminer le H2S, et le H2 purifié est recyclé.

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