CATALYST FOR PYROLYSIS OF HYDROCARBON MIXTURE C-C, METHOD OF THEREOF OBTAINING AND METHOD OF CATALYTIC PYROLYSIS OF HYDROCARBON MIXTURE C-C IN LOWER OLEFINS C-C ON THIS CATALYST Russian patent published in 2016 - IPC B01J23/745 B01J23/75 B01J23/755 B01J23/44 B01J27/16 B01J37/08 C07C4/06 

FIELD: chemistry.

SUBSTANCE: invention deals with catalyst for pyrolysis of hydrocarbon mixture C₁-C₄, formed in form of film coating in tubular flow-type reactor. Catalyst is obtained as a result of high temperature decomposition of iron nitrate, or composition of iron nitrate with orthophosphoric acid, or cobalt nitrate, or composition of cobalt nitrate with orthophosphoric acid or nickel nitrate, or composition of palladium chloride with orthophosphoric acid. The invention also relates to method of obtaining said catalyst, which includes its formation on the walls of tubular flow-type reactor in form of film coating, by their processing with water solution of iron nitrate, or water solution of iron nitrate composition with orthophosphoric acid, or with water solution of cobalt nitrate, or water solution of cobalt nitrate composition with phosphoric acid or water solution of cobalt nitrate, or water solution of cobalt nitrate composition with orthophosphoric acid, or water solution of nickel nitrate, or water solution of palladium chloride composition with orthophosphoric acid, heating of processed reactor at first for 2 hours at t = 200°C, then for 2-2.5 hours at t = 700-800°C. In addition, the invention relates to method of catalytic pyrolysis of hydrocarbon mixture C₁-C₄ into lower olefins C₂-C₄, carried out in tubular flow-type reactor at temperature 710-830°C, and it is realised in presence of claimed catalyst under pressure, close to atmospheric, rate of gas mixture passing equals 25-100 ml/min, contact time is 0.67-17.0 s, values of heterogenic factor are 6.7-5.6·10⁵ cm^-1.

EFFECT: increase of catalyst thermal stability at high temperatures, increase of its service term, increase of output of individual olefins, such as methane, ethane an propylene with low coke-formation, increase of process safety.

7 cl, 1 tbl, 1 dwg