Process for catalytic cracking of naphtha using multi-stage radial flow moving bed reactor system

A method of producing olefins;

• the method comprising:
• providing a first reactor that comprises a shell and a first moving catalyst bed within the shell of the first reactor, a first catalyst bed of the first moving catalyst bed is formed by flowing first catalyst particles to an upper portion of a first perforated container within the shell of the first reactor so that the first catalyst particles flow downward from the upper portion of the first perforated container, by gravity, to a lower portion of the first perforated container and then flow out of the first reactor to a catalyst regenerator unit;
• flowing a liquid hydrocarbon feed into a first region within the first reactor, from which the liquid hydrocarbon feed flows radially through a first section of the first perforated container, then through the first moving catalyst bed, thereby providing contact of the liquid hydrocarbon feed with the first catalyst particles of the first moving catalyst bed;
• as a result of the contact, catalytically cracking the liquid hydrocarbon feed under first reaction conditions sufficient to form olefins;
• flowing a stream comprising the olefins from the first moving catalyst bed through a second section of the first perforated container and into a second region within the shell;
• flowing a first effluent from the second region within the shell to a first heater located outside of the first reactor;
• heating the first effluent in the first heater;
• flowing the heated first effluent to a second reactor;
• and
• catalytically cracking the heated first effluent in the second reactor under second reaction conditions sufficient to form additional olefins;
• flowing a second effluent from the second reactor to a second heater;
• heating the second effluent from the second reactor to a desired temperature to form a heated effluent;
• flowing the heated second effluent to a third reactor;
• and
• catalytically cracking the heated second effluent in the third reactor under third reaction conditions sufficient to form further olefins;
• wherein the first reactor and the second reactor are redial flow moving bed reactors;
• wherein the first catalyst particles comprise a zeolite component having a topology of one or more of FER and MOR;
• and
• wherein the first reaction conditions, the second reaction conditions, and/or the third reaction conditions comprises a temperature of 750 to 900° C., a pressure of 0.5 to 10 bar, and a WHSV of 1 to 15 hr−1.