OXIDATIVE DEHYDROGENATION OF ALKANES (OD) Russian patent published in 2020 - IPC C07C5/48 C07C11/02 

FIELD: chemical or physical processes.

SUBSTANCE: invention relates to a method for oxidative dehydrogenation of an alkane containing from 2 to 6 carbon atoms to an alkene, containing from 2 to 6 carbon atoms, including: supply of initial gas containing alkane and oxygen, into inlet in reactor, wherein reactor comprises reactor housing, multiple reactor tubes, located inside the reactor housing, and a perforated partition, which divides the reactor inner part into the upstream portion and the downstream portion, wherein a plurality of reactor tubes comprise: (i) a downstream catalyst bed located in an upstream portion which contains an oxidative dehydrogenation catalyst comprising tellurium, and (ii) a downstream catalyst bed located in the downstream portion which contains oxidative dehydrogenation / oxygen removal catalyst, which is not a catalyst for oxidative dehydrogenation, containing tellurium; bringing into contact initial gas with oxidative dehydrogenation catalyst in catalyst layer, located upstream, followed by bringing into contact with oxidative dehydrogenation / oxygen removal catalyst in downstream catalyst layer, where the process is carried out such that the upstream catalyst bed is in an oxidative medium to obtain a stream comprising an alkene leaving the reactor; and feeding cooling liquid into the upper space of the reactor housing from the cooling liquid circuit upstream and supplying cooling liquid into the lower space of the reactor housing from the cooling liquid circuit downstream. Invention also relates to a reaction system.

EFFECT: disclosed method improves efficiency of the catalyst while maintaining low concentration of oxygen in the outlet gas.

11 cl, 1 dwg