Multi-zoned alkylation reactor with settler effluent recycle
AssigneeUop LLC
InventorsRobert M. Gray, Keith W. Hovis
Life of this patent
Estimating the term…
Abstract
A system for increasing the isobutane to olefin ratio in an alkylation process/system is disclosed. The system includes provisions for charging a portion of the settler effluent as a feed to at least one reaction zone downflow from the first reaction zone of a multi-zone alkylation reactor along with a portion of the olefin feed to the multi-zone alkylation reactor.
Claims23
A system comprising:
- a multi-zone alkylation reactor comprising a first reaction zone and a second reaction zone, operably related to each other such that a first reaction zone effluent passes to said second reaction zone from said first reaction zone;
- first conduit means operably related in fluid flow communication to said first reaction zone for introducing a first olefin stream into said first reaction zone;
- second conduit means operably related in fluid flow communication to said first reaction zone for introducing a portion of a fresh isobutane stream into said first reaction zone;
- third conduit means operably related in fluid flow communication to said second reaction zone for introducing a second olefin stream into said second reaction zone;
- fourth conduit means operably related in fluid flow communication to said second reaction zone and to said second conduit means for introducing a portion of said fresh isobutane stream into said second reaction zone;
- fifth conduit means operably related in fluid flow communication to said second reaction zone and operably related to a settler vessel for transport of a second reaction zone effluent to said settler vessel for separation into a hydrocarbon phase and an acid phase;
- sixth conduit means operably related in fluid flow communication to said settler vessel and to said second reaction zone for transporting a portion of said hydrocarbon phase as a settler effluent stream from said settler vessel to said second reaction zone;
- and
- seventh conduit means operably related in fluid flow communication to said settler vessel and to said first reaction zone for transporting at least a portion of said acid phase as an alkylation catalyst stream to said first reaction zone.
The system in accordance with 1 further comprising eighth conduit means operably related in fluid flow communication to said sixth conduit means and to a fractionator for transporting at least a portion of said settler effluent stream from said sixth conduit means to said fractionator.
The system in accordance with 2 further comprising ninth conduit means operably related in fluid flow communication to said fractionator and to said first reaction zone for transport of at least a portion of a recycle isobutane stream to said first reaction zone.
The system in accordance with 3 further comprising tenth conduit means operably related in fluid flow communication to said ninth conduit means and to said second reaction zone for transport of a portion of said recycle isobutane stream to said second reaction zone and eleventh conduit means operably related in fluid flow communication to said fractionator for removing an alkylate product stream from said fractionator.
A system comprising:
- a multi-zone alkylation reactor comprising a first reaction zone, a second reaction zone, and a third reaction zone operably related to each other such that a first reaction zone effluent passes to said second reaction zone from said first reaction zone and such that a second reaction zone effluent passes to said third reaction zone from said second reaction zone;
- first conduit means operably related in fluid flow communication to said first reaction zone for introducing a first olefin stream into said first reaction zone;
- second conduit means operably related in fluid flow communication to said first reaction zone for introducing a portion of a fresh isobutane stream into said first reaction zone;
- third conduit means operably related in fluid flow communication to said second reaction zone for introducing a second olefin stream into said second reaction zone;
- fourth conduit means operably related in fluid flow communication to said second reaction zone and to said second conduit means for introducing a portion of said fresh isobutane stream into said second reaction zone;
- fifth conduit means operably related in fluid flow communication to said third reaction zone for introducing a third olefin stream into said third reaction zone;
- sixth conduit means operably related in fluid flow communication to said third reaction zone and to said second conduit means for introducing a portion of said fresh isobutane stream into said third reaction zone;
- seventh conduit means operably related in fluid flow communication to said third reaction zone and operably related to a settler vessel for transport of a third reaction zone effluent to said settler vessel for separation into a hydrocarbon phase and an acid phase;
- eighth conduit means operably related in fluid flow communication to said settler vessel and to said second reaction zone for transporting a portion of said hydrocarbon phase as a settler effluent stream from said settler vessel to said second reaction zone;
- and
- ninth conduit means operably related in fluid flow communication to said settler vessel and to said first reaction zone for transporting at least a portion of said acid phase as an alkylation catalyst stream to said first reaction zone.
Dependencies are inferred from the claim text.