초록 ▼

A method, and a reactor, for hydroprocessing a hydrocarbon feed stream through multistage fixed catalyst beds contained within a single onstream reactor vessel, with a separate catalyst addition and a separate catalyst withdrawal system for the upper or top essentially fixed catalyst bed. The upper

A method, and a reactor, for hydroprocessing a hydrocarbon feed stream through multistage fixed catalyst beds contained within a single onstream reactor vessel, with a separate catalyst addition and a separate catalyst withdrawal system for the upper or top essentially fixed catalyst bed. The upper or top essentially fixed catalyst bed functions as a guard catalyst bed for removing a major proportion of contaminants (e.g. organometallic constituents) from a hydrocarbon feed stream in order to extend the life of one or more fixed catalyst beds serially disposed underneath the upper or top essentially fixed catalyst bed. Catalyst particles are withdrawn from the essentially fixed catalyst bed by slurrying or liquifying the catalyst particles in a container disposed within the reactor. A method for retrofitting a reactor assembly having two or more fixed catalyst beds in order to place a guard catalyst bed in the upper or top portion of the reactor assembly.

대표청구항 ▼

[ We claim:] [1.] A down-flow fixed bed reactor assembly comprising a reactor vessel having a reactor wall including an internal cylindrical wall; a catalyst bed support means coupled to and supported by the internal cylindrical wall of said reactor wall of said reactor vessel for supporting an esse

[ We claim:] [1.] A down-flow fixed bed reactor assembly comprising a reactor vessel having a reactor wall including an internal cylindrical wall; a catalyst bed support means coupled to and supported by the internal cylindrical wall of said reactor wall of said reactor vessel for supporting an essentially fixed catalyst bed in an upper hydroconversion reaction zone and for allowing a hydrocarbon feed stream to pass therethrough while preventing catalyst particles from an essentially fixed catalyst bed to exit therethrough; a container means disposed in proximity to said catalyst bed support means for assisting in slurrying generally spent catalyst particles from an essentially fixed catalyst bed in an upper hydroconversion reaction zone above said catalyst bed support means; a hydrocarbon conduit means, passing through said reactor wall of said reactor vessel and communicating with said container means, for introducing a hydrocarbon into said container means for assisting in slurrying generally spent catalyst particles from an essentially fixed catalyst bed in an upper hydroconversion reaction zone of said reactor vessel; a catalyst outlet means, passing through said reactor wall of said reactor vessel and communicating with said container means, for withdrawing a generally spent catalyst particles in slurry form from an upper hydroconversion reaction zone in said reactor vessel; and at least one lower hydroconversion reaction zone, serially disposed in said reactor vessel under said catalyst bed support means, for containing at least one fixed catalyst bed.