METHOD OF PRODUCING WAXY PETROLEUM FRACTIONS Russian patent published in 2004 - IPC

FIELD: petroleum processing. SUBSTANCE: waxy petroleum fractions are obtained by treating diesel fractions, atmospheric gas oil, or lube distillate in hydrogen atmosphere and in presence of catalyst containing crystalline-structure aluminosilicate compounds and hydrogenating components, said aluminosilicate compounds particularly being zeolites beta, Y, and ZSM-5 and said hydrogenating components being introduced from their salt aqueous solutions with pH 2-6. Before introducing feedstock, catalyst is activated in hydrogen-containing gas flow at 300-400 C for 3-6 h and at hydrogen-containing gas flow rate at least 350 cu.m/h per 1 t catalyst. Process is carried out at 240-380 C, volumetric feedstock flow rate 1,0-2,0 h^-1, ratio of hydrogen-containing gas to oil feedstock 400-1500 n cu.m/cu.m, and hydrogen pressure 3 MPa. EFFECT: enabled processing of feedstock with a wide fraction composition and increased service cycle of catalyst. 2 cl, 3 tbl, 10 ex