METHOD OF PREPARING OIL CONTAINING HYDROGEN SULPHIDE Russian patent published in 2016 - IPC B01D19/00 B01D53/52 

FIELD: oil industry.

SUBSTANCE: invention relates to methods of preparing oil containing hydrogen sulphide for transportation. Method of preparing oil containing hydrogen sulphide comprises multistage separation, dehydration, desalting with fresh water, separation at temperature 30-65 °C and low pressure in end separator, neutralisation of residual hydrogen sulphide with reagent, separation of oil in end separator is performed at pressure 0.03-0.10 MPa, which is created by pumping out gas with a liquid piston pump. Working fluid used for pumping and compression of gas is fresh water in amount of 1-5 % of weight of purified oil. After compression of gas is separated from water in a gas-water separator, wherein gas is fed into gas line, and fresh water with separated from gas hydrocarbon condensate - into oil for desalination.

EFFECT: technical results is increased yield of commercial oil, easy implementation of oil separation at low pressure, reduction of costs associated with cleaning oil from hydrogen sulphide.

1 cl, 1 dwg