Claims
- 1. A process for transalkylating benzene with polyalkylbenzene in a transalkylation reactor containing at least one bed of transalkylation catalyst, comprising:
- introducing a feed of benzene and polyalkylbenzene at a first end of said bed;
- monitoring the temperature of said bed to determine deactivated portions of said bed;
- removing an inactive portion of said catalyst from the first end of said bed based on said monitoring of temperature of said bed; and
- adding an active portion of said catalyst to a second end of said bed, said second end being an end opposite to said first end of said bed.
- 2. The process of claim 1 wherein said transalkylation catalyst is a zeolite catalyst.
- 3. The process of claim 1 wherein said inactive portion of said catalyst is continuously removed from said bed and said active portion of said catalyst is continuously added to said bed.
- 4. The process of claim 1 wherein said inactive portion of said catalyst is periodically removed from said bed and said active portion of said catalyst is periodically added to said bed.
- 5. The process of claim 1 wherein said removing of said inactive portion of said catalyst from said bed comprises:
- passing said inactive portion of said catalyst to a holding means;
- passing said inactive portion from said holding means to a catalyst regeneration means; and
- regenerating said inactive portion of said catalyst.
- 6. The process of claim 5 wherein said regeneration of said inactive portion of said catalyst comprises:
- oxidizing said inactive portion of said catalyst with an atmosphere initially comprising about 0.5% molecular oxygen in admixture with an inert gas; and
- increasing said molecular oxygen content to about 2% during said regeneration.
- 7. The process of claim 5 wherein said adding of said active portion of catalyst to said catalyst bed comprises:
- passing said active portion of catalyst from a catalyst regeneration means to a holding means; and
- passing said active portion of catalyst from said holding means to said catalyst bed.
Parent Case Info
This is a division of application Ser. No. 186,959, filed Apr. 27, 1988 now U.S. Pat. No. 4,973,780.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
4237329 |
Kamiyama et al. |
Dec 1980 |
|
4885426 |
Chu et al. |
Dec 1989 |
|
Foreign Referenced Citations (1)
Number |
Date |
Country |
8912613 |
Dec 1989 |
WOX |
Non-Patent Literature Citations (1)
Entry |
Kirk-Othmer Encyclopedia of Chemical Technology, 3rd ed., vol. 19, John Wiley & Sons (1982), p. 886. |
Divisions (1)
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Number |
Date |
Country |
Parent |
186959 |
Apr 1988 |
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