METHOD OF PETROLEUM REFINING FROM HYDROGEN SULFIDE Russian patent published in 2005 - IPC

FIELD: oil-refining industry; methods of oil refining.

SUBSTANCE: the invention is pertaining to the field of oil refining, in particular to a method of refining of petroleum, gas condensate and their factions and also oil emulsions from hydrogen sulfide. Refining is carried out by treatment of raw material by 10-45 % water solution of pyrosulfite or hydrosulfite of alkali metal or ammonium hydrosulfite in quantity of no less than 1 gramme-molecule of pyrosulfite or no less than 2 gramme-molecule of hydrosulfite per 1 gramme-molecule of hydrogen sulfide. The process is carried out at the temperature of 10-80°C at the presence of 10-45 % water solutions of hydroxide water solution , or 10-25 % of a water solution of carbonate, orthophosphate and-or sodium or ammonia sulfite at the ratio of 0.5-2 gramme-molecule of the given reagent per 1 gramme-molecule of carbon sulfide. At that the indicated solution is introduced in the feed stock in the form of a separate stream or together with the water solution of pyrosulfite or sodium hydrosulfite in the form of a previously prepared water solution of the reagent - neutralizer. Part of a spent water solution of reagents after separation from the rectified raw material is preferably returned in the process. Technical effect - increase of separation efficiency at simplification of the method and decrease of corrosive attack of the reactivity medium.

EFFECT: the invention ensures increased efficiency of separation, decreased corrosive attack of the reaction medium, simplification of the method.

6 cl, 8 ex