CATALYST FOR FISCHER-TROPSCH SYNTHESIS AND METHOD FOR ITS PRODUCTION Russian patent published in 2021 - IPC B01J23/46 B01J23/745 B01J31/06 B01J37/18 C07C1/04 

FIELD: chemical industry.

SUBSTANCE: invention relates to the chemical industry, namely, to the field of production of heterogeneous catalysts for the Fischer-Tropsch synthesis, and can be used at chemical enterprises to obtain liquid hydrocarbons. The Fischer-Tropsch synthesis catalyst contains a support, iron as the main component, ruthenium as a hydrogenation activator, while the support is hypercrosslinked polystyrene, the total content of iron and iron compounds in the catalyst is 0.94-2.98 wt.%, The total content of ruthenium and ruthenium compounds in the catalyst is 0.44-1.44 wt.%, and the content of hypercrosslinked polystyrene is 96-98.2 wt.%. The method of obtaining a catalyst for the Fischer-Tropsch synthesis includes preparing a solution of an iron salt and applying it to a carrier, for this a solution is used containing 0.07-0.21 g Fe(NO₃)₃·9H₂O, 0.01-0,03 g RuOHCl₃·2H₂O and 0.09-0.11 g NaHCO₃ in 15 ml of distilled water, the treatment of the carrier with an iron salt solution is carried out under hydrothermal conditions for 14-16 minutes at a nitrogen pressure of 5.9-6.1 MPa, temperature 195-205°C and stirring at a speed of 450-550 rpm, then the mixture is cooled to a temperature of 20-30°C, filtered, washed with 9.5-10.5 ml of distilled water, dried in air at a temperature of 100-110°C for 3.5-4.5 hours and subjected to reduction in a tubular furnace at a temperature of 295-305°C in a hydrogen atmosphere at a flow rate of 10-15 ml / min for 3.5-4.5 hours, while using a hypercrosslinked polystyrene with a granule size of 440-460 microns, a degree of crosslinking of 190-210%, an inner surface area of 1300-1500 m² / g, a narrow pore distribution with a maximum of 4.5 nm, specific pore volume 0.8-1.0 cm³ / g, the content of mesopores with a diameter of 20-50 Å - not less than 30%, with a diameter of 60-80 Å - not less than 10%, with a diameter of 200-800 Å - not less than 20%.

EFFECT: technical result of the invention is to increase the activity, stability, selectivity for C₅-C₁₄ hydrocarbons of the catalyst in the Fischer-Tropsch synthesis due to the use of a solid support with a large surface area, the formation of highly dispersed uniformly distributed particles of the active phase, the absence of sulfur, chlorine, silicon and nitrogen.

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