Process for the catalytic alkylation of a hydrocarbon feed

Details Process for the catalytic alkylation of a hydrocarbon feed Process for the catalytic alkylation of a hydrocarbon feed

1999-09-10

2001-03-20

Johnson, Jerry D. (Department: 1764)

Chemistry of hydrocarbon compounds

Saturated compound synthesis

By condensation of a paraffin molecule with an olefin-acting...

C585S720000, C585S721000

Reexamination Certificate

active

06204425

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an improved process for the supported liquid phase alkylation of hydrocarbon feed.
2. Description of the Related Art
Supported liquid phase alkylation is known to be carried out in a reactor with a fixed bed of appropriate particular contact material, on which a moveable reaction zone is established within a confined area of the contact material with an adsorbed perfluorinated alkyl sulphonic acid alkylation catalyst. As the alkylation reactions proceed in the reaction zone, the zone moves as a band through the reactor within the fixed bed of contact material (U.S. Pat. No 5,220,095).
The downstream portion of the reaction zone is, thereby, substantially horizontal levelled across the sectional area of the reactor during migration of the reaction zone. The upstream portion of the reaction zone is observed to migrate at different velocity on the reactor cross section and with different velocity than the downstream portion. This may result in differences in the reaction zone thickness as the zone migrates from top to bottom of the reactor. The different migration velocity may be caused by radial differences of the contact material loading density or particle size distribution.
SUMMARY OF THE INVENTION
It has now been found that the above disadvantage of the supported liquid phase alkylation process can be substantially avoided, when subdividing the fixed bed of contact material in a number of small vertical channels or by arranging within the reactor a number of parallel tubes loaded with the contact material.
The vertical channels may be established by arranging vertical plates or an elongated structure with parallel or cross-arranged plates within the fixed bed of contact material particle. Furthermore, the channels may be formed by one or more monolithic bodies with straight channels.
When carrying out the process in a number of small sized tubes arranged in the alkylation reactor, the alkylation reaction is advantageously cooled by indirect cooling with a cooling medium in indirect heat exchange with the reacting hydrocarbon feedstream inside the tubes.
A preferred cooling medium will be the reactor effluent stream usually containing a suitable amount of unconverted hydrocarbon feed which by indirect heat exchange is flashed off the effluent stream.


REFERENCES:
patent: 3456033 (1969-07-01), Borst, Jr.
patent: 3469949 (1969-09-01), Borst, Jr.
patent: 3501536 (1970-03-01), Borst, Jr.
patent: 5220095 (1993-06-01), Hommeltoft et al.
patent: 5245100 (1993-09-01), Hommeltoft et al.
patent: 5603812 (1997-02-01), Hommeltoft
patent: 5948240 (1999-09-01), Mulvaney, III et al.
patent: 0 987 237 A2 (2000-03-01), None

Affiliated with

Also associated with

Rating

Process for the catalytic alkylation of a hydrocarbon feed does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for the catalytic alkylation of a hydrocarbon feed, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the catalytic alkylation of a hydrocarbon feed will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2463878