On the basis of porphyrin concentrate extracted from oil there have been synthesized cobalt(II)porphyrin complex and its dioxygen adduct. The structure of the obtained complexes was determined by studying their electronic and IR-spectra. The molecular weight of the oil cobalt(II)porphyrin complex, defined by mass spectroscopic method made up 456. The molar ratio of cobalt(II)porphyrin complex and molecular oxygen is 2:1. Found that dioxygen adduct of cobalt(II)porphyrin complex has the ability to epoxidize alkenes