Process for catalytically converting naphtha to light olefins with predominant modes
AssigneeUop LLC
InventorsDeng-Yang Jan, Xi Zhao, Jaime G. Moscoso, Mathias Paul Koljack, Gregory A. Funk
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Abstract
A process for converting naphtha to predominantly ethane comprising contacting a naphtha stream with a zeolitic catalyst comprising a noble metal and hydrogen to produce a light paraffin stream comprising ethane and propane; wherein the catalyst comprises at least about 0.005 wt % noble metal at a ratio of hydrogen to hydrocarbon of less than about 5. In a predominantly propane mode, the catalyst comprises about 0.005 wt % noble metal and operates at a reaction temperature of no more than about 450° C. The process can be switched between modes depending on the desires of the operator.
Claims21
A process for converting naphtha to predominantly ethane comprising:
- contacting a naphtha stream with a zeolitic catalyst comprising a noble metal and hydrogen to produce a light paraffin stream comprising ethane and propane;
- wherein the catalyst comprises at least about 0.005 wt % noble metal at a ratio of hydrogen to hydrocarbon of less than about 5.
A process for converting naphtha predominantly to propane comprising:
- contacting a naphtha stream with a zeolitic catalyst comprising a noble metal and hydrogen to produce a light paraffin stream comprising ethane and propane;
- wherein the catalyst comprises at least about 0.005 wt % noble metal, operating at a reaction temperature of no more than about 440° C.
A process for converting naphtha to ethane and propane comprising:
- contacting a naphtha stream with a zeolitic catalyst comprising a noble metal and hydrogen to produce a light paraffin stream comprising ethane and propane;
- wherein the catalyst comprises at least about 0.005 wt % noble metal;
- switching from a predominant ethane mode at a ratio of hydrogen to hydrocarbon of less than about 2 to a predominant propane mode at a ratio of hydrogen to hydrocarbon of at least about 2;
- or
- switching from a predominant propane mode at a reaction temperature of no more than about 440° C. to a predominant ethane mode at a reaction temperature of more than about 440° C.
A process for converting naphtha to ethane and propane comprising contacting a naphtha stream with a zeolitic catalyst comprising a noble metal and hydrogen to produce a light paraffin stream comprising ethane and propane, wherein the catalyst comprises at least about 0.1 wt % noble metal;
- switching from a predominant ethane mode at WHSV of less than 4 hr−1 to a predominant propane mode at WHSV of at least 4 hr−1;
- or switching from a predominant propane mode at WHSV of at least 4 hr−1 to a predominant ethane mode at WHSV of less than 4 hr−1.
Dependencies are inferred from the claim text.