Patent ID: 9669350
Date: 2017-06-06
CPC Classifications: B01D

Claim:
1. A process for adsorbing hydrogen chloride (HCl) from a regeneration vent gas, the process comprising: cooling the regeneration vent gas from a catalyst regeneration zone; passing the cooled regeneration vent gas to an adsorption zone that is spaced apart from the catalyst regeneration zone; adsorbing HCl from the regeneration vent gas onto a sorbent in the adsorption zone to enrich the sorbent with HCl to provide HCl-rich sorbent and deplete HCl from the regeneration vent gas to provide HCl-lean regeneration vent gas; purging the HCl-lean regeneration vent gas as an effluent gas; passing the HCl-rich sorbent from the adsorption zone to a sorbent regeneration zone; desorbing HCl from the HCl-rich sorbent in the sorbent regeneration zone to provide a regenerated sorbent; transferring the regenerated sorbent to the adsorption zone; cooling the regenerated sorbent in a cooling zone disposed below the sorbent regeneration zone; collecting the regenerated sorbent in a collecting zone disposed below the cooling zone, measuring a temperature change in the cooling zone; and measuring a thermal mass flow using said measured temperature change.