Process and furnace for the steam cracking of hydrocarbons...

Details Process and furnace for the steam cracking of hydrocarbons... Process and furnace for the steam cracking of hydrocarbons...

B - Operations, Transporting

01

J

23/400, 260/703.

B01J 10/00 (2006.01) C07C 4/04 (2006.01) C07C 11/02 (2006.01) C10G 9/14 (2006.01) C10G 9/20 (2006.01)

Patent

CA 1256124

ABSTRACT OF THE DISCLOSURE The present invention relates to a process for the preparation of olefins by thecracking of hydrocarbons consisting in passing a mixture of hydrocarbons and steam flowing in a cracking tube disposed inside a radiation zone of a furnace. The process is characterized in that an increase of the cracking temperature of the mixture between the inlet and the outlet of the radiation zone is associated to a non - homogeneous distribution of the thermal power of the furnace, greater at the beginning of the cracking tube than at the end, and to a reaction volume which is greater in the second half of the length tube than in the first one. The present invention relates also to a cracking furnace in which between the inlet and the outlet of the radiation zone the diameter of the cracking tube increasesand the thermal power of the heating means decreases.

540457

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