METHOD FOR HYDRODESULPHURISATION OF HYDROCARBON FLOW Russian patent published in 2013 - IPC C10G45/04 C10G65/04 B01J37/25 B01J35/02 

FIELD: oil and gas industry.

SUBSTANCE: method includes the following: supply of a flow of olefin naphtha (16), containing olefin and sulphur; hydraulic treatment of a flow of olefin naphtha in the first zone of desulphurisation (12) under the temperature of the first reaction efficient for conversion of a part of sulphur content into hydrogen sulfide to produce effluent that comes out from the first zone of desulphurisation (24); hydraulic treatment of effluent coming out without removal of hydrogen sulfide from the first zone of desulphurisation (24), in the second zone of desulphurisation (14) at the second higher temperature of reaction compared to the first stage of hydraulic treatment using a selective layerwise catalyst, efficient for desulphurisation of the effluent produced in the second zone of desulphurisation (32). At the same time the catalyst of the second zone of hydrodesulphurisation includes an inner nucleus and an active thin outer layer with thickness of 5-100 microns, surrounding the inner nucleus, besides, the tin outer layer contains active materials for desulphurisation.

EFFECT: using this invention makes it possible to reduce saturation of olegins and recombination of sulphur to mercaptans to the minimum.

11 cl, 1 ex, 3 tbl, 1 dwg