HYDROGENATION METHOD AND DEVICE Russian patent published in 2020 - IPC C10G65/06 C10G65/08 

FIELD: oil and gas industry.

SUBSTANCE: present invention relates to reactions of hydrogenation of different fractions in oil processing. Invention discloses a method of hydrogenating a hydrocarbon stream containing olefinic compounds, aromatic compounds or a combination thereof, involving the following steps: I) supply of hydrocarbon stream and hydrogen into first reaction zone of hydrogenation unit, II) hydrogenating, in a first reaction zone, at least a portion of aromatic compounds, olefin compounds or a combination thereof in the presence of a catalyst to obtain a first intermediate product, III) cooling and separating the first intermediate product into a first intermediate liquid stream and a first intermediate gas stream, IV) displacement first intermediate gas stream to second reaction zone of hydrogenation unit, V) separating the first intermediate liquid stream into a first portion of the first intermediate liquid stream and a second portion of the first intermediate liquid stream and a) moving the first portion of the first intermediate liquid stream to the inlet of the first reaction zone as a liquid recycle stream to limit temperature rise in the first reaction zone to less than 60 °C and b) moving a second portion of the first intermediate liquid stream to a second reaction zone, where remaining aromatic compounds, olefin compounds or a combination thereof, contained in the second portion of the first intermediate liquid stream, is hydrogenated by means of a first intermediate gas stream in the presence of a catalyst to obtain a saturated product or c) moving the second portion of the first intermediate liquid stream into the liquid bypass line which bypasses the second reaction zone, wherein the second portion of the first intermediate liquid stream comprises a saturated product, VI) separating a saturated product obtained in step b) or c) into a liquid product stream and separated gas stream, VII) extraction of liquid product stream from hydrogenation unit, wherein steps I)–VII) in the high-pressure section are carried out at constant pressure selected from range of 2–8 MPa, preferably 3–6 MPa. Invention also relates to an apparatus for realizing the method.

EFFECT: saving capital costs, reducing power consumption in production cycles, saving hydrogen consumption.

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