Fixed bed reactor assembly having a guard catalyst

专利名称：Fixed bed reactor assembly having a guard

catalyst bed

发明人：Harold J. Trimble,Dennis R. Cash申请号：US08/639057申请日：19960424公开号：US05879642A公开日：19990309

摘要：A method, and a reactor, for hydroprocessing a hydrocarbon feed streamthrough multistage fixed catalyst beds contained within a single onstream reactor vessel,with a separate catalyst addition and a separate catalyst withdrawal system for the upperor top essentially fixed catalyst bed. The upper or top essentially fixed catalyst bedfunctions 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 lifeof one or more fixed catalyst beds serially disposed underneath the upper or topessentially fixed catalyst bed. Catalyst particles are withdrawn from the essentially fixedcatalyst bed by slurrying or liquifying the catalyst particles in a container disposed withinthe reactor. A method for retrofitting a reactor assembly having two or more fixedcatalyst beds in order to place a guard catalyst bed in the upper or top portion of thereactor assembly.

申请人：CHEVRON U.S.A. INC.

代理人：Alan W. Klaassen

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