CATALYST FOR SYNTHESISING HYDROCARBONS FROM CO AND H AND METHOD FOR PRODUCTION THEREOF Russian patent published in 2022 - IPC B01J23/75 B01J29/44 B01J29/46 B01J21/04 B01J37/04 

FIELD: catalysts.

SUBSTANCE: invention relates to a catalyst for synthesising hydrocarbons from CO and H₂ by the Fischer-Tropsch method and to a method for producing the catalyst. Catalyst contains, wt.%: a cobalt catalyst with aluminium additive on a silica gel carrier 30 to 40; boehmite binder 30 to 40; ZSM-5 zeolite in H-form the rest. Cobalt catalyst with aluminium additive on a silica gel carrier contains, wt.%: cobalt 6.5 to 8.7; aluminium additive 0.33 to 0.43; silica gel carrier the rest. ZSM-5 zeolite contains, wt.%: ruthenium additive 0.8 to 1.2; ZSM-5 zeolite in H-form the rest. Method for producing a catalyst, according to which: a cobalt catalyst with aluminium additive on a silica gel carrier is produced, said catalyst is crushed to particles with a size less than 0.1 mm, mixed with powders of ZSM-5 zeolite and boehmite binder with particle sizes less than 0.1 mm, and a solution of nitric acid is added, being prepared by adding 1 to 2 ml of nitric acid with a concentration of 65% to 90-100 ml of distilled water (per 100 g of powder mixture), with triethylene glycol, calculating for the volume ratio of nitric acid:triethylene glycol in the mixture of 1:3, the mixture if stirred to a homogeneous mass, the mass is heated while constantly stirring and held at a temperature of 60 to 70°C to a residual humidity of 70 wt.%, catalyst granules with a diameter of less than 2 mm are shaped, dried for 20 to 24 hours at a temperature of 20 to 25°C, for 4 to 6 hours at a temperature of 80 to 100°C, for 2 to 4 hours at a temperature of 100 to 150°C, calcined for 4 to 6 hours at a temperature of 340 to 360°C, crushed to particles with a size of 2 to 3 mm, then activated with hydrogen for 0.75 to 1 hour at a volumetric gas flow rate of 3,000 h^-1 and a temperature of 380 to 400°C. ZSM-5 zeolite with ruthenium additive is produced by impregnation, wherein at the stage of impregnation, the powder of ZSM-5 zeolite in H-form with a particle size of less than 0.1 mm is placed in an aqueous solution of ruthenium hydroxotrichloride - Ru(OH)Cl₃, prepared by introducing ruthenium hydroxotrichloride to 140-160 ml of distilled water, calculating for the mass ratio corresponding to 0.8-1.2 wt.% ruthenium in the ZSM-5 zeolite in H-form, heated to a temperature of 60 to 70°C, stirred for 0.4 to 0.6 hours, followed by filtering the ZSM-5 zeolite with ruthenium additive and drying for 6 to 8 hours at a temperature of 80 to 100°C and 2 to 4 hours at a temperature of 100 to 140°C, then calcining for 4 to 6 hours at a temperature of 540 to 560°C.

EFFECT: production of high-quality hydrocarbons of the target fraction with high activity and selectivity in terms of the formation of branched hydrocarbons of C₁₁-C₁₈, C₁₉₊ fractions with a reduced content of n-olefins.

2 cl, 3 tbl, 7 ex, 3 dwg