公开(公告)号：US20170152448A1

公开(公告)日：2017-06-01

申请号：US15363676

申请日：2016-11-29

Applicant: AXENS

Inventor： Annick PUCCI ,  Marielle GAGNIERE

IPC: C10G50/00 ,  C10G69/12

CPC classification number: C10G50/00 ,  C10G69/126 ,  C10G2300/1088 ,  C10G2300/1092

Abstract: The invention concerns a process for the production of middle distillates, comprising at least one step for the catalytic oligomerization of a feed comprising olefins containing 3 to 9 carbon atoms, in which the reaction section comprises at least two reactors which are positioned in series and which can be permutated, each containing at least one oligomerization catalyst for the oligomerization reactions, said catalysts being identical or different, and in which the reactor which is the furthest downstream in the direction of movement of said feed comprising olefins contains the catalyst with a period of service which is shorter than the period of service of the catalysts present in the other reactors and is operated at an average temperature (WABTn) which is lower than the average temperature (WABTn−1) of the reactor directly preceding it, the difference between said average temperatures being at least 10° C. (WABTn−1−WABTn≧10° C.).

公开(公告)号：US20190194552A1

公开(公告)日：2019-06-27

申请号：US16227606

申请日：2018-12-20

Applicant: AXENS

Inventor： Claire SILBERSTEIN ,  Odile LAJEUNESSE ,  Jacques RAULT ,  Marielle GAGNIERE

IPC: C10G45/22 ,  F28D7/02 ,  C10G47/00 ,  C10G67/02 ,  B01J19/00

Abstract: The present invention relates to a device and a process for hydroconversion or hydrotreatment of a hydrocarbon feedstock, comprising in particular at least one coil-wound heat exchanger (S-1), said coil-wound exchanger being a single-pass heat exchanger formed by a vertical chamber in which one or more bundles of tubes are helically wound around a central core, as numerous superposed layers, for: heating and directly distributing a hydrocarbon feedstock/hydrogen stream mixture to a hydrotreatment or hydroconversion reaction section (R-1), and cooling the reaction effluent from the hydrotreatment or hydroconversion reaction section (R-1). The present invention also relates to a use of a coil-wound heat exchanger (S-1) in a process for hydroconversion or hydrotreatment of a hydrocarbon feedstock.