CATALYTIC CRACKER Russian patent published in 2024 - IPC C10G11/18 B01J8/24 

FIELD: oil refining; petrochemical industry.

SUBSTANCE: invention concerns catalytic cracking unit (1), including series-connected riser reactor (2), separation unit (3), catalyst stripping unit (21), and catalyst regenerator (4). Riser reactor (2) includes a sequentially located regulated input unit (5) of transport gas, including water vapor, input unit (b) of hot catalyst, with the possibility of supplying a hot catalyst from the outlet of catalyst regenerator (4), initial reaction section (7), unit for controlled input (8) of raw materials, main reaction section (9), first unit for controlled input (10) of cooling recirculating hydrocarbon distillate fractions, end reaction section (11). Separation unit (3) is located at the exit from end reaction section (11) of lift reactor (2) and includes separator (12) equipped with inlet (13), drain risers (14), and gas outlet pipes (15), while inlet hole (13) connected to the outlet of end reaction section (11) of elevator reactor (2), cyclones (16), each equipped with inlet pipe (17), gas outlet pipe (18), and drain riser (19), with inlet pipes (17) cyclones (16) are located at the outlet of gas outlet pipes (15) of separator (12) with the possibility of a mixture of cracking product vapours and water vapour entering from gas outlet pipes (15) of separator (12) into inlet pipes (17) of cyclones (16), and gas outlet pipes (18) of cyclones (16) are configured to output target products, second controlled input unit (20) of recirculating hydrocarbon distillate fractions, made with the possibility of controlled input of cooling recirculating hydrocarbon distillate fractions directly to the outlet from gas outlet pipes (15) of separator ( 12) before entering inlet pipes (17) of cyclones (16). Catalyst stripping unit (21), located under drain risers (14) of separator (12) and drain risers (19) of cyclones (16), is equipped with catalyst output unit (22), which is connected to the inlet of catalyst regenerator (4).

EFFECT: increased severity of ongoing processes while simultaneously increasing the yield of target products and reducing the proportion of undesirable secondary reactions.

4 cl, 4 dwg, 1 ex