Method for the conversion of feedstock containing naphtha to low carbon olefins and aromatics

A method of producing low carbon olefins and/or aromatic from feedstock comprising naphtha;

• the method comprising:
• a) feeding feedstock comprising naphtha into a fast fluidized bed reactor;
• b) contacting the feedstock with a catalyst under reaction conditions in the fast fluidized bed reactor such that the contacting produces a gas product and spent catalyst;
• c) separating the gas product to produce a stream comprising primarily one or more low carbon olefins and/or one or more aromatics;
• d) transporting the spent catalyst to a regenerator;
• e) regenerating the spent catalyst in the regenerator to form regenerated catalyst;
• and
• f) returning the regenerated catalyst to the fast fluidized bed reactor, wherein step d) includes:
• transporting the first portion of the spent catalyst from the fluidized bed reactor through a stripper to a stripper inclined pipe and then to a regenerator riser;
• and
• lifting, by gas, the spent catalyst through the regenerator riser into the regenerator;
• wherein the fast fluidized bed reactor that the catalyst is Geldart A particle and a operation gas line velocity is between 2 and 10 m/s;
• and where there is a dense phase region and a dilute phase region in the reactor.

A method of producing low carbon olefins and/or aromatic from feedstock comprising naphtha;

• the method comprising:
• a) feeding feedstock comprising naphtha into a fast fluidized bed reactor;
• b) contacting the feedstock with a catalyst under reaction conditions in the fast fluidized bed reactor such that the contacting produces a gas product and spent catalyst;
• c) separating the gas product to produce a stream comprising primarily one or more low carbon olefins and/or one or more aromatics;
• d) transporting the spent catalyst to a regenerator;
• e) regenerating the spent catalyst in the regenerator to form regenerated catalyst;
• and
• f) returning the regenerated catalyst to the fast fluidized bed reactor;
• wherein in the gas product a yield of low carbon olefins is in a range of 38 to 47 wt. %;
• and wherein, in the gas product, yield of aromatics is in a range of 15 to 20 wt. % and yield of methane is in a range of 7 wt. % to 8 wt. %;
• and
• wherein the one or more low carbon olefins is a selection of the list consisting of:
• ethylene, propylene, and butadiene;
• wherein the fast fluidized bed reactor that the catalyst is Geldart A particle and a operation gas line velocity is between 2 and 10 m/s;
• and where there is a dense phase region and a dilute phase region in the reactor.