Alkyl halides conversion into ethylene and propylene

Process for converting one or more alkyl halides to ethylene and propylene, said process comprising the following steps:

• a) providing a feedstream comprising one or more alkyl halides;
• optionally, diluted in at least one diluent;
• b) providing a first catalyst composition and a second catalyst composition, said second catalyst composition comprising a cracking catalyst;
• c) contacting said feedstream with said first catalyst composition in a first reaction zone under first reaction conditions to provide a first product stream;
• and
• d) subjecting at least a part of said first product stream to an Olefin Catalytic Cracking with said second catalyst composition in a second reaction zone under second reaction conditions to provide a second product stream,
• the process is characterized in that it further comprises a step of steaming said first catalyst composition before the step (c), and in that said first catalyst composition comprises one or more zeolites and a binder, wherein said one or more zeolites comprise at least one 10-membered ring channel.