Claims
- 1. A process for the isomerization of olefins, comprising one or both of butenes and pentenes, which comprises contacting an olefin-containing feedstock at isomerization conditions with a catalyst containing at least one non-zeolitic molecular sieve and having the substantial absence of Group VIII metals to provide a product containing a greater concentration of one or more of the group consisting of isobutenes and isopentenes than in the feedstock.
- 2. The process of claim 1 wherein the isomerization is carried out in the presence of free hydrogen.
- 3. The process of claim 1 wherein the isomerization conditions comprise a temperature of from about 200.degree. to 600.degree. C., a pressure of from about atmospheric to 50 atmospheres, and a weight hourly space velocity of from about 0.5 to 100 hr.sup.-1.
- 4. The process of claim 1 wherein the non-zeolitic molecular sieve is selected from the group consisting of SAPOs, FAPOs, CoAPSOs, MnAPSOs, MgAPSOs and mixtures thereof.
- 5. The process of claim 4 wherein the non-zeolitic molecular sieve is selected from the group consisting of SAPO-11, SAPO-31 and SAPO-41.
- 6. The process of claim 5 wherein the non-zeolitic molecular sieve is SAPO-11.
- 7. The process of claim 1 wherein the catalyst comprises an inorganic oxide matrix component.
- 8. The process of claim 7 wherein the inorganic oxide matrix comprises silica.
- 9. The process of claim 1 wherein the catalyst contains less than 100 mass ppm of Group VIII metals.
- 10. The process of claim 9 wherein the Group VIII metal comprises a platinum-group metal.
- 11. The process of claim 10 wherein the platinum-group metal comprises one or both of platinum and palladium.
- 12. The process of claim 1 wherein the olefins in the feedstock comprise both butenes and pentenes in a molar ratio respectively of from about 10:1 to 1:20.
- 13. The process of claim 12 wherein the olefins in the feedstock comprise both butenes and pentenes in a molar ratio respectively of from about 5:1 to 1:9.
- 14. A process for the isomerization of olefins, comprising butenes and pentenes in a molar ratio respectively of from about 10:1 to 1:20, which comprises contacting an olefin-containing feedstock at isomerization conditions with a catalyst containing at least one non-zeolitic molecular sieve to provide a product containing a greater concentration of isobutenes and isopentenes than in the feedstock.
CROSS REFERENCE TO RELATED APPLICATION
This application is a continuation-in part of application Ser. No. 814,167, filed Dec. 30, 1991 and now U.S. Pat. No. 5,191,146, which is a continuation-in-part of application Ser. No. 670,139, filed Mar. 15, 1991, now U.S. Pat. No. 5,132,484, which is a continuation-in-part of application Ser. No. 442,879, filed Nov. 29, 1989 now abandoned, the contents of all of which are incorporated herein by reference thereto.
US Referenced Citations (23)
Continuation in Parts (3)
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Number |
Date |
Country |
Parent |
814167 |
Dec 1991 |
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Parent |
670129 |
Mar 1991 |
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Parent |
442879 |
Nov 1989 |
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