METHOD OF OIL CLEANING FROM HYDROGEN SULPHIDE Russian patent published in 2020 - IPC B01D19/00 

FIELD: oil and gas industry; technological processes.

SUBSTANCE: invention relates to methods of degassing oil during its preparation at fields and can be used in oil industry for removal of hydrogen sulphide from oil before its transportation via pipelines. Method of oil purification from hydrogen sulphide by gas desorption consists in blowing oil in gas flow. Sulphurous oil is fed into sulphurous oil purification column whereto associated gas is dispersed in hydrogen-sulphide pre-cleaned in apparatus for physical and chemical processes. Then, cleaned oil is removed for further pumping through the pipeline, and associated petroleum gas contaminated during the blow-off of oil by hydrogen sulphide is returned for purification into apparatus for carrying out physical and chemical processes to provide a closed cycle of cleaning oil from hydrogen sulphide with one volume of associated oil gas. Method of purifying oil from hydrogen sulphide provides effective purification of up to 96 % and enables to purify several volumes of high-sulfur oil by one gas volume, which reduces consumption of pure gas. At that, method implementation is possible without obligatory heating of oil.

EFFECT: dispersion of associated petroleum gas into oil enables to increase inter-phase interaction surface, intensify mass transfer between liquid and gaseous phases, which promotes efficient desorption of hydrogen sulphide from oil and enables to obtain purified oil practically free from hydrogen sulphide.

1 cl, 1 dwg, 1 tbl