METHOD OF PURIFYING PETROLEUM AND GAS CONDENSATE TO REMOVE HYDROGEN SULFIDE AND MERCAPTANS Russian patent published in 2003 - IPC

FIELD: petroleum processing. SUBSTANCE: purification is carried out by oxidation of raw material with air oxygen in quantity 1.1-1.6 mole per 1 mole hydrogen sulfide and mercaptan sulfur at 10 to 65 C and pressure 0.3 to 3 MPa in presence of, as catalyst, secondary or tertiary alkylamine, or tertiary alkanolamine, or mixture thereof in quantities 0.01 to 0.2 wt %. Secondary and tertiary alkylamine utilized are mainly di- and tri-C1-C4-alkylamines and tertiary alkanolamine may be triethanolamine and/or methyldiethanolamine. When raw material with S_R/S_H ratio more than 1 is to be purified, raw material is supplemented by elementary sulfur, amounts of which are calculated from formula: . When raw material has high content of hydrogen sulfide, oxidation reaction can be accelerated by adding ferric ethylenediaminetetraacetic acid disodium salt complex or cobaltic pyrophosphate complex in quantities 0.05 to 3.0 g per 1 t raw material. EFFECT: considerably increased degree of purification from mercaptans at no loss in degree of removal of hydrogen sulfide, and widened assortment of utilized catalysts. 5 cl, 7 ex