CATALYST FOR HYDROFINING DIESEL FRACTIONS AND METHOD OF PREPARING THEREOF Russian patent published in 2017 - IPC B01J23/883 B01J23/882 B01J21/02 B01J21/04 B01J37/08 C10G45/08 

FIELD: chemistry.

SUBSTANCE: catalyst comprises a carrier of alumina and molybdenum oxide composition and comprises the following in wt %: molybdenum oxide - 16.0-22.0; nickel or cobalt oxide - 5.0-7.0; boron oxide - 0.7-1.0, wherein the ratio of molybdenum oxide to boron oxide is in the range of 22.0-22.85, while the ratio of nickel or cobalt oxide to molybdenum oxide is 0.31-0.32. A method of preparing the catalyst, comprising forming a carrier consists in that the catalyst carrier is produced by humidification and peptization of aluminium hydroxide, followed by mixing it with ammonium molybdate and plasticiser, extruding of the resulting mixture, followed by drying, calcination and evacuation of the carrier before impregnation with the catalytically-active components. Impregnation of the carrier is carried out in two successive stages, at the first stage the carrier is impregnated with an aqueous boric acid solution with intermediate drying and calcination. At the second stage it is impregnated with a solution comprising ammonium molybdate, nickel nitrate or cobalt nitrate, hydrogen peroxide and nitric acid in the following weight ratio: 0.65-0.86: 1.4-1.98: 1.24-1.41:1.

EFFECT: high catalytic activity, which provides high output of a stable hydrogenation product and obtaining diesel fuels with ultralow sulphur content.

2 cl, 1 tbl, 6 ex