Sequential cracking of hydrocarbons

Details Sequential cracking of hydrocarbons Sequential cracking of hydrocarbons

C - Chemistry, Metallurgy

07

C

260/708.8

C07C 4/04 (2006.01) B01J 12/00 (2006.01) B01J 19/00 (2006.01) C07C 5/327 (2006.01) C07C 11/04 (2006.01)

Patent

CA 1263967

A B S T R A C T SEQUENTIAL CRACKING OF HYDROCARBONS Process for the production of ethylene by pyrolytically cracking one or more C2-6-paraffins in a pyrolytic cracking furnace having a plurality of elongated serpentine-situated thermal cracking tubes which have a 20-50% longer run life as a result of the selective cracking of a hydrocarbon feed having more carbon atoms per molecule than the C2-6-paraffins at conditions sufficient to selectively place a coat of amorphous, relatively smooth coat of coke on the interior walls of the thermal cracking tubes and thereby mask the catalytic effect of iron, nickel, both iron and nickel, or other metal catalytic sites indigenous to the walls of the tubes.

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