REMOVAL OF SULFUR FROM NAPHTHA Russian patent published in 2020 - IPC C10G7/00 C10G19/02 C10G25/05 C10G45/02 C10G65/04 

FIELD: technological processes.

SUBSTANCE: invention relates to a method of reducing sulfur content in a full range of naphtha raw material, comprising treating raw material 610 of naphtha in an alkaline treatment zone 605 to obtain stream 620 with reduced sulfur content; separation of stream 620 with reduced content of sulfur into stream 635 of upper product and stream 640 of lower product, and stream 640 of lower product contains at least part of flow of naphtha feed to FCC; introducing at least a portion of the stream of naphtha feed into the selective hydrodesulphurization zone 145 under conditions of selective hydrodesulphurization in the presence of a selective hydrodesulphurization catalyst to form a stream with low sulfur content, wherein stream with low sulfur content contains mercaptan compounds and thiophene compounds; separating, in stripping column 170, at least a portion of a stream with low sulfur content into at least two streams: mercaptan-rich stream 175 containing mercaptan compounds and thiophene compounds, and upper product stream 180 containing hydrogen sulphide and liquid oil gas; and treating mercaptan-rich stream 175 in adsorption zone 185 to remove at least a portion of the mercaptan compounds and thiophene compounds to form a mercaptan depleted stream 195.

EFFECT: disclosed is a method of reducing content of sulfur.

10 cl, 6 dwg