Hydroprocessing in multiple beds with intermediate flash zones

Details Hydroprocessing in multiple beds with intermediate flash zones Hydroprocessing in multiple beds with intermediate flash zones

C - Chemistry, Metallurgy

10

G

C10G 65/12 (2006.01) C10G 65/02 (2006.01)

Patent

CA 2567628

The instant invention comprises a hydroprocessing method having at least two stages. The first stage employs a hydroprocessing catalyst which may contain hydrotreating catalyst, hydrocracking catalyst, or a combination of both. The subsequent stage is limited to hydrocracking. Conversion in subsequent stages may be improved by the addition of multiple reaction zones for hydrocracking, with flash separation zones between the stages. Middle distillate yield is thereby increased and the volume of the recycle stream is reduced. This invention reduces the need for equipment which would normally be required for a large recycle stream.

La présente invention comprend un procédé d'hydrotraitement comportant au moins deux étages. Le premier étage utilise un catalyseur d'hydrotraitement pouvant contenir un catalyseur de traitement par hydrogène, un catalyseur d'hydrocraquage ou une combinaison des deux. L'étage suivant est limité à l'hydrocraquage. La conversion dans les étages successifs peut être améliorée par l'addition de zones de réaction multiples pour l'hydrocraquage, avec des zones de séparation de détente entre les étages. Le rendement de distillat moyen est ainsi accru et le volume du flux de recyclage est réduit. L'invention réduit la nécessité d'un équipement qui serait normalement nécessaire à un grand flux de recyclage.

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