Method and system for regenerating catalyst from a plurality of hydrocarbon conversion apparatuses

A reactor system, comprising:

• a first reaction unit comprising a first plurality of riser reactors;
• a second reaction unit comprising a second plurality of riser reactors, wherein each of the first and second reaction units has a first end into which a catalyst can be fed and a second end through which the catalyst can exit the reaction unit;
• a regeneration unit having a regeneration inlet and a regeneration outlet;
• a regeneration line having a plurality of first line ends in fluid communication with the second ends of the first and second reaction units and a second line end extending to the regeneration inlet;
• and
• a return line having a first return end in fluid communication with the regeneration outlet, a second return end directing a first portion of the catalyst to the first reaction unit, and a third return end directing a second portion of the catalyst to the second reaction unit.

A method for forming olefins in a methanol to olefin reactor system, comprising:

• contacting in a first reaction unit a first oxygenate with a first catalyst under conditions effective to convert at least a portion of the first oxygenate to a first olefin and at least partially deactivating the first catalyst to form a deactivated first catalyst;
• contacting in a second reaction unit a second oxygenate with a second catalyst under conditions effective to convert at least a portion of the second oxygenate to a second olefin and at least partially deactivating the second catalyst to form a deactivated second catalyst;
• directing the deactivated first catalyst and deactivated second catalyst to a regeneration unit;
• regenerating the deactivated first catalyst and the deactivated second catalyst to form regenerated catalysts;
• directing a first portion of the regenerated catalysts to the first reaction unit;
• and
• directing a second portion of the regenerated catalysts to the second reaction unit.

A hydrocarbon conversion system, comprising:

• first and second pluralities of riser reactors, each of the riser reactors having a first end into which a catalyst can be fed and a second end through which the catalyst can exit the riser reactor;
• first and second catalyst retention zones provided to contain catalyst which can be fed to the first and second plurality of riser reactors, respectively;
• first and second separation zones into which the second ends of the first and second pluralities of riser reactors extend, respectively, the separation zones being provided to separate the catalyst from products of a reaction conducted in the first and second pluralities of riser reactors;
• first and second catalyst returns in fluid communication with the first and second separation zones, respectively, and the first and second catalyst retention zones, respectively;
• a regenerator for regenerating the catalyst;
• first and second catalyst outlet lines, each of the outlet lines having a first end into which a catalyst can be fed from the first and second pluralities of riser reactors, respectively, and a second end through which the catalyst can enter the regenerator;
• and
• first and second catalyst return lines, each of the return lines having a first end into which a catalyst can be fed from the regenerator and a second end through which the catalyst can enter the first and second pluralities of riser reactors, respectively.

A catalyst regenerator system, comprising:

• a regeneration zone for contacting an at least partially deactivated catalyst with a regeneration medium under conditions effective to form a regenerated catalyst;
• a plurality of catalyst inlets for receiving the at least partially deactivated catalyst from a plurality of reactor units;
• and
• a plurality of catalyst outlets for delivering the regenerated catalyst to the plurality of reactor units.

A method for regenerating catalyst, comprising:

• receiving an at least partially deactivated catalyst from a plurality of multiple riser reaction units;
• heating the catalyst under conditions effective to convert the at least partially deactivated catalyst to a regenerated catalyst;
• and
• directing the regenerated catalyst to the plurality of multiple riser reaction units.

A hydrocarbon conversion system, comprising:

• a plurality of reaction units, each unit comprising a plurality of riser reactors;
• and
• at least one regeneration unit coupled to the reaction units;
• wherein the number of reaction units is greater than the number of regeneration units.