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US 4,908,121 AGranted
Flexible feed pyrolysis process
AssigneeThe M. W. Kellogg Company
InventorsLarry G. Hackemesser, Bradley L. Lankford
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Abstract
When steam cracking hydrocarbons to lower olefins in a tubular fired furnace having a convection section for preheating hydrocarbon feed, feedstock flexibility to process light feeds is provided by cooling mixed feed of steam and hydrocarbon followed by reheating to the desired mixed feed temperature.
Claims9
A process for steam cracking hydrocarbons in a tubular, fired furnace having a convection section for preheating the hydrocarbons and a radiant section for cracking the preheated hydrocarbons which comprises:
- (a) preheating an initial hydrocarbon feed in the convection section;
- (b) mixing diluent steam with the resulting preheated, initial hydrocarbon feed to form a mixed feed;
- (c) cooling the mixed feed;
- (d) reheating the cooled mixed feed in the convection section;
- and
- (e) cracking the reheated mixed feed containing all the initial hydrocarbon feed in the radiant section.
3 more elements
Dependencies are inferred from the claim text.