B - Operations – Transporting – 01 – J
Patent
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
Bellet Serge
Martens Andre
Naphtachimie Societe Anonyme
Smart & Biggar
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