Claims
- 1. A process for the skeletal isomerization of n-olefins containing at most 20 carbon atoms, comprising (a) contacting in a containing catalyst particles of a diameter of about 1-3 mm reaction zone and in the presence of water, a charge containing the n-olefins with an alumina-based catalyst containing alumina and 0.03 to 0.6 wt. % of titanium, at a water/olefin charge molar ratio between 0.1 and 3, a reaction zone temperature between 300.degree. and 600.degree. C., a pressure between 1 and 10 bars, and a space velocity of the charge between 0.1 and 10 h.sup.-1, and wherein the process takes place continuously, (b) passing the catalyst through the reaction zone, (c) drawing the catalyst off for regeneration, (d) regenerating the catalyst and treating the catalyst with steam at a temperature substantially equal to that of the reaction zone, the steam quantity in contact with the catalyst in the reaction zone and during the treatment after regeneration being between 3 and 85 wt. % based on the catalyst weight, and (e) recontacting the catalyst with the charge.
- 2. A process according to claim 1, wherein the catalyst flow is under a steam atmosphere.
- 3. A process according to claim 1, wherein steam treatment is performed at between 110.degree. and 700.degree. C. under a partial steam pressure above 0.1 bar and for between 6 min and 10 hours.
- 4. A process according to claim 1, wherein catalyst is regenerated by injecting a gas containing oxygen, at a temperature of 350.degree. to 550.degree. C. and under a pressure between 1 and 15 bars.
- 5. A process according to claim 1, wherein flow in the reaction zone is radial.
- 6. A process according claim 1, wherein catalyst is periodically extracted from the reaction zone.
- 7. A process according to claim 1, wherein regeneration is performed batchwise.
- 8. A process according claim 1, wherein steam treatment is performed batchwise.
- 9. A process according to claim 1, wherein catalyst flow is continuous.
Priority Claims (1)
Number |
Date |
Country |
Kind |
93 01389 |
Feb 1993 |
FRX |
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Parent Case Info
This application is a continuation of application Ser. No. 08/195,010 filed Feb. 29, 1994 and now abandoned.
US Referenced Citations (5)
Continuations (1)
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Number |
Date |
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Parent |
195010 |
Feb 1994 |
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