High-active hydrotreating catalysts for heavy petroleum feeds: Intentional synthesis of CoMo sulfide particles with optimal localization on the support surface

The method for preparation of high-active catalysts for hydrotreating of vacuum gas oil is described. The method is based on selective incorporation of bimetal Co–Mo complexes into pores of Al2O3 exposed to all molecules of the feedstock. The composition, structure and morphology of the resulting surface bimetal sulfide particles are very close to the particles characteristic of the best modern hydrotreating catalysts. The obtained catalyst is very active to hydrotreating of vacuum gas oil and superior to the best of Russian industrial catalysts.