| 主权项 |
1. Method of conversion of a hydrocarbon-containing feed comprising at least one fraction of hydrocarbons with a sulphur content of at least 0.1% weight, an initial boiling temperature of at least 340° C. and a final boiling temperature of at least 440° C., comprising the following steps:
a) a step of hydroconversion in the presence of hydrogen in at least one reactor containing a supported catalyst in an ebullated bed, b) a step of separating the effluent obtained from step a) into at least one light fraction of hydrocarbon fuel bases and a heavy fraction containing predominantly compounds boiling at minimum 350° C., c) a step of fixed bed hydrotreatment of at least part of the heavy fraction from step b) in which, under hydrotreatment conditions, the heavy fraction and hydrogen are passed over a hydrotreatment catalyst and in which the hydrotreatment step comprises one or a plurality of fixed bed hydrotreatment zones preceded by at least two storage zones also with fixed bed hydrotreatment, arranged in series to be used in a cyclic manner comprising the successive repetition of steps c″) and c′″) defined below:
c′) a step in which the storage zones are used together for a duration at most equal to the deactivation and/or clogging time of one of them,c″) a step during which the deactivated and/or clogged storage zone is short-circuited and the catalyst it contains is regenerated and/or replaced by fresh catalyst, and during which the other storage zone(s) is/are used, andc′″) a step during which the storage zones are all used together, wherein the storage zone of which the catalyst has been regenerated during the preceding step is reconnected and said step is continued for a duration equal at most to the deactivation and/or clogging time of one of the storage zones. |
