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US 5,026,935 AGranted
Enhanced production of ethylene from higher hydrocarbons
AssigneeArco Chemical Technology, L.P.
InventorsDavid W. Leyshon, John A. Sofranko, C. Andrew Jones
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Abstract
The present invention provides a process for the preparation of ethylene from C.sub.4 or higher feed by a combination of cracking and metathesis wherein higher hydrocarbon is cracked to form ethylene and propylene and at least a portion of the propylene is metathesized to ethylene.
Claims2
The method for the production of ethylene which comprises:
- (a) cracking a C.sub.4 or higher hydrocarbon over a zeolite catalyst at conditions favoring production of ethylene and propylene to form a mixture comprised of ethylene, propylene and butene,
- (b) recovering ethylene from the step (a) reaction mixture,
- (c) metathesizing propylene from the step (a) reaction mixture to form additional ethylene together with butene,
- (d) recovering said additional ethylene from the step (c) reaction mixture, and
- (e) recycling butene contained in the mixture from step (a) and formed in step (c) to the cracking reaction of step (a).
2 more elements
Dependencies are inferred from the claim text.