Process for converting one or more methyl halides into ethylene and propylene

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

• a) providing a feedstream (1) comprising one or more methyl 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 (1) with said first catalyst composition in a first reaction zone (3) under first reaction conditions to provide a first product stream (5);
• and
• d) subjecting at least a part of said first product stream (5) to an olefin catalytic cracking with said second catalyst composition in a second reaction zone (7) under second reaction conditions to provide a second product steam (9),
• the process is characterized in that
• said first reaction conditions include a reaction temperature below 400° C., and in that said first catalyst composition comprises a first catalyst composition molecular sieve with a Si/Al atomic ratio ranging from 2 to 18, wherein the first catalyst composition molecular sieve comprises a plurality of pores, with a shape of an 8-membered ring or less and further wherein the first catalyst composition molecular sieve in the first catalyst composition is SSZ-39;
• wherein the first product stream has a propylene to ethylene ratio of greater than 1, wherein the second reaction conditions of step (d) include a reaction temperature ranging from 500° C. to 600° C.,
• wherein the cracking catalyst of the second catalyst composition comprises one or more molecular sieves selected from silicalites from the MFI family with a Si/Al atomic ratio of more than 100, crystalline silicate from the MFI family with a Si/Al atomic ratio of at least 180, crystalline silicate from the MEL family with a Si/Al atomic ratio ranging between 150 and 800, or combinations thereof.