METHOD OF HYDRAULIC PROCESSING OF THE PRODUCT OF FISHER-TROPSH LOW-TEMPERATURE SYNTHESIS Russian patent published in 2018 - IPC C10G67/02 C10G65/12 

FIELD: technological processes.

SUBSTANCE: present invention relates to a process for producing a high-quality diesel fuel having a low pour point. Method for hydroprocessing low-temperature Fischer-Tropsch synthesis products comprising the steps of: 1) Fischer-Tropsch wax is mixed with a sulfur-containing liquid catalyst in a certain proportion, the sulfur-containing liquid catalyst is a low-grade diesel fuel from catalytic cracking or diesel fuel from coking; and the sulfur-containing liquid catalyst is 20 to 50 % by weight of the total weight of the sulfur-containing liquid catalyst and Fischer-Tropsch wax, the resulting mixture is contacted with hydrogen, feeding the hydrogen-containing mixture to the first reaction zone containing the pre-treatment catalyst by hydrogenation, feeding the effluent from the first reaction zone to the second reaction zone containing the hydrocracking catalyst and carrying out the hydrocracking reaction; 2) feeding the hydrocracking product from the second reaction zone and naphtha and Fischer-Tropsch diesel fuel to the third reaction zone containing the hydrotreating catalyst, hydrotreating reaction; feeding the effluent from the hydrotreating reaction to a fourth reaction zone containing a hydro-isomerization catalyst that reduces the flow temperature, and an isomerization reaction that reduces the flow temperature; and 3) feeding the effluent from the fourth reaction zone to the gas-liquid separation system C to produce hydrogen-enriched gas and liquid products, hydrogen-rich gas is recycled, introducing liquid products into the distillation system D to produce naphtha, diesel fuel and tail oil and returning the tail oil fraction to the second reaction zone.

EFFECT: increase in the density of synthesized diesel fuel, a decrease in the condensation temperature, and automobile diesel fuel can be achieved.

9 cl, 5 ex, 2 tbl, 1 dwg