FIELD: petrochemical processes. SUBSTANCE: optimal running of column-type suspension bubble reactor involving gas phase and liquid phase, in particular for Fischer- Tropsch process, is performed in at least two stages. Flow conditions of gas phase and liquid phase containing solid particles are essentially piston action conditions with gas velocity 3 to 200 m/s and liquid velocity 0 to 10 m/s. Concentration of solids in each stage is essentially constant and the same in each stage: 5 to 50 % vol/vol. EFFECT: simplified technology. 8 cl, 7 dwg, 6 tbl, 6 ex
