Processes and apparatuses for regenerating a catalyst

An apparatus for removing coke from a catalyst, the apparatus comprising:

• a disengaging zone, the disengaging zone configured to receive a mixture of catalyst and a lift gas and separate the catalyst from the lift gas, the catalyst comprising coke and at least one additive;
• a regeneration zone configured to receive a first portion of catalyst from the disengaging zone and wherein the regeneration zone is operated under conditions to remove coke from the catalyst and provide a regenerated catalyst and a vent gas, wherein the vent gas comprises the at least one additive;
• and,
• an adsorption zone configured to receive a second portion of catalyst from the disengaging zone and wherein the adsorption zone is operated under conditions to adsorb, with the catalyst from the second portion, the at least one additive in the vent gas;
• wherein the first portion of the catalyst is isolated from the adsorption zone.

A process for regenerating a catalyst, the process comprising:

• disengaging catalyst from a lift gas, the catalyst comprising coke and at least one active additive;
• splitting the catalyst into a first portion and a second portion;
• removing coke from the catalyst of the first portion in a regeneration zone, the regeneration zone operated under conditions to remove coke from the catalyst and provide a regenerated catalyst and a vent gas, wherein the vent gas comprises the at least one active additive;
• adsorbing the at least one active additive from the vent gas with the catalyst from the second portion in an adsorption zone, wherein the adsorption zone produces an adsorption zone vent gas;
• removing coke from the catalyst of the second portion in the regeneration zone;
• and,
• separating, in a separation zone, the adsorption zone vent gas into a water stream and a recycle gas stream, the recycle gas stream being passed to the regeneration zone.