OIL REFINING UNIT (VERSIONS) Russian patent published in 2010 - IPC C10G27/06 C10G27/10 C10G33/02 B01D19/00 

FIELD: oil and gas production.

SUBSTANCE: hydrogen sulphide containing oil (see Fig.1) is supplied in a charge separator 2 equipped with a gas bubbler flask 4 where due to pressure reduction and hydrocarbon gas blowing and/or exhaust air, desorption removal of a portion of hydrogen sulphide is observed. Partially refined oil with the introduced oxidation catalyst (see positions 5-10) is supplied by a pump 12 to a reactor 15 where it is additionally purified from hydrogen sulphide and light mercaptan due to their oxidation by introduced air. The reaction mixture is supplied in the high pressure separator 16 ensuring partial separation of exhaust air due to pressure reduction to 0.2 MPa which from the top of the separator is supplied through the gas bubbler flask 4 in the charge separator 2 for blowing hydrogen sulphide from oil. Further it is supplied in the low pressure separator 22 wherefrom the refined and degassed oil is supplied in the first buffer reservoir 25. After filling, oil from the separator is supplied to parallel second reservoir 26, and the filled reservoir 25 is settled for at least 3 hours for water sediment containing water-soluble products of hydrogen sulphide oxidation. In the other version of installation (see Fig.2) the oil refined from hydrogen sulphide, with the pump 27 is supplied in electrodehydrator 30 for separation of emulsion water and salts.

EFFECT: invention allows reducing the concentration of total sulphur, water, salts and products of hydrogen sulphide oxidation in commodity oil and reducing expenses for installation operation.

15 cl, 2 dwg