DIESEL FRACTION HYDRODESULFURIZATION CATALYST AND A METHOD FOR PREPARATION THEREOF Russian patent published in 2007 - IPC B01J37/02 B01J21/02 B01J21/04 B01J23/88 B01J23/882 B01J31/04 C10G45/08 

FIELD: petroleum processing catalysts.

SUBSTANCE: invention relates to catalysts for production of low-sulfur motor fuels and methods for preparing such catalysts. Hydrodesulfurization catalyst according to invention is characterized by pore volume 0.3-0.7 mL/g, specific surface 200-350 m²/g, and average pore diameter 9-13 nm and containing following components, wt %: cobalt compounds (calculated as CoO) 2.5-7.5, molybdenum compounds (as MoO₃), citric acid 15-35, boron compounds (as B₂O₃) 0.5-3.0, aluminum oxide - the rest, cobalt, molybdenum, citric acid, and boron optionally being part of complex compound having different stoichiometry. Catalyst is prepared by impregnating catalyst support with impregnation solution obtained by dissolving, in water or aqueous solution, following compounds: citric acid, ammonium paramolybdate (NH₄)₆Mo₇O₂₄·4H₂O, at least one cobalt compound, and at least boron compound, addition order and component dissolution conditions being such as to provide formation of complex compounds, whereas concentration of components in solution is selected such that catalyst obtained after drying would contain components in above-indicated concentrations.

EFFECT: maximized activity of desired reactions ensuring production of diesel fuels with sulfur level below 50 ppm.

9 cl, 8 ex