Abstract: The process principles and characteristics of the conventional caustic wash and chlorine adsorption (Chlorsorb) technology were compared briefly, and the application of Chlorsorb technology in a 1.2 Mt/a CCR unit was introduced. Operation results showed that with the increase of temperature, the efficiency of chlorine adsorption dropped, the optimum temperature for chlorine adsorption of the catalyst were in the range of 138—148 ℃; the chlorine content of catalyst after passing adsorption zone increased by 0.26 percentage point. The chlorine corrosion of vent gas cooler at 138 ℃ was analyzed and countermeasures were adopted. The effect of Chlorsorb technology under high temperature and high humid conditions on the activity of CCR catalyst was discussed and suggestions, such as adding a dechlorination tank and selecting high temperature chlorine adsorbent, to improve the operation during final stage were proposed.

Key words: chlorine adsorption, continuous catalytic reforming, commercial application