| 摘要 |
The invention relates to a method for converting hydrocarbon feedstocks by means of thermal steam cracking to form at least one olefinic product flow which contains at least ethylene and propylene, wherein a first hydrocarbon feedstock is at least partially converted in at least a first cracking furnace (1) and a second hydrocarbon feedstock is at least partially converted in at least a second cracking furnace (2). According to the invention, the second hydrocarbon feedstock is converted in the second cracking furnace (2) under cracking conditions which lead to a propylene to ethylene ratio of 0.7 to 1.6 kg/kg, and the first hydrocarbon feedstock is converted in the first cracking furnace (1) under cracking conditions which lead to a propylene to ethylene ratio of 0.25 to 0.85 kg/kg at the cracking furnace outlet, the value for the propylene to ethylene ratio for the second hydrocarbon feedstock being above the value for the propylene to ethylene ratio for the first hydrocarbon feedstock. |
