FIELD: industrial organic synthesis. SUBSTANCE: improved process for production of heavy hydrocarbons according to Fischer-Tropsch method includes: (i) feeding gas reagents into reactor and (ii) at least partially discharging heavy hydrocarbons formed in stage (i) by separating them, inside or outside apparatus, from catalyst particles, reaction in stage (i) being carried out in presence of solid particles with Reynolds number (Rep) higher than 0.1 and solid particles being maintained in suspended state to height H at such values Us, Ul and Ug, to provide Bodenstein number Bos≤1, preferably ≤0,4. EFFECT: improved catalyst/liquid separation stage. 5 cl, 7 dwg, 1 tbl, 8 ex
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