PROCESS FOR PREPARING OLEFINIC HYDROCARBONS Russian patent published in 1999 - IPC

FIELD: petrochemistry. SUBSTANCE: paraffinic hydrocarbons are hydrogenated at temperature from 450 to 800 C, pressures from 0.1 to 3 abs atm and volumetric gas rate from 100 to 1000 h h^-1 in the presence of catalyst which comprises (wt %): preferably 6.0-30.0 (13-25) Cr₂O₃; 0.1-3.5 (0.2- 2.8) SnO; 0.4-3.0(0.5-2.5) MeO; 0.08-3.0 (0.08-3.0 SiO₂, and the Al₂O₃ balance wherein Me is alkali metal, preferably potassium. EFFECT: higher yield of the desired product. 9 cl, 17 ex, 1 dwg, 2 tbl