US 12,304,887 B2
Recovery of light olefins from dry hydrocarbon gas from refinery and petrochemical production processes for production of alkylate
Gautham Krishnaiah, Houston, TX (US); Brian Heasley, Cypress, TX (US); John Lewis Webb, Jr., Richmond, TX (US); Rahul Radhakrishna Pillai, Manvel, TX (US); Vijender K. Verma, Richmond, TX (US); and Narinder Singh Duggal, Haryana (IN)
Assigned to KELLOGG BROWN & ROOT LLC, Houston, TX (US)
Filed by Gautham Krishnaiah, Houston, TX (US); Brian Heasley, Cypress, TX (US); John Lewis Webb, Jr., Richmond, TX (US); Rahul Radhakrishna Pillai, Manvel, TX (US); Vijender K. Verma, Richmond, TX (US); and Narinder Singh Duggal, Haryana (IN)
Filed on Aug. 15, 2023, as Appl. No. 18/450,266.
Application 18/450,266 is a division of application No. 17/130,260, filed on Dec. 22, 2020, granted, now 11,905,241.
Prior Publication US 2023/0391691 A1, Dec. 7, 2023
Int. Cl. C07C 7/11 (2006.01); B01D 53/14 (2006.01); B01D 53/18 (2006.01); B01J 8/02 (2006.01); C07C 2/12 (2006.01); C07C 7/00 (2006.01); C07C 7/09 (2006.01)
CPC C07C 7/11 (2013.01) [B01D 53/1406 (2013.01); B01D 53/1468 (2013.01); B01D 53/1475 (2013.01); B01D 53/1487 (2013.01); B01D 53/1493 (2013.01); B01D 53/18 (2013.01); B01J 8/02 (2013.01); C07C 2/12 (2013.01); C07C 7/005 (2013.01); C07C 7/09 (2013.01); B01D 2252/10 (2013.01); B01D 2252/204 (2013.01); B01D 2252/205 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A system for treating an olefin-containing stream, wherein the olefin-containing stream comprises:
one or more olefins selected from the group consisting of ethylene and propylene, and
one or more light components selected from the group consisting of hydrogen (H2), carbon monoxide (CO), and methane, the system comprising:
an absorber column comprising a hydrocarbon solvent and is configured to separate the one or more olefins from the one or more light components by contacting the olefin-containing stream with the hydrocarbon solvent at a pressure of about 135 psi and at a temperature ranging from −30° F. at the top of the column to 0° F. at the bottom of the column to absorb at least a portion of the one or more olefins into the solvent to provide an olefin-enriched solvent stream, wherein the solvent is an alkylation precursor;
an alkylation reactor is configured to receive the olefin-enriched solvent stream and react the one or more olefins with the solvent to produce an alkylate;
one or more fractionating columns configured to receive an alkylation reactor effluent stream comprising the alkylate, the one or more fractionating columns configured to separate the alkylation reactor effluent stream into a lean solvent stream and an enriched alkylate product stream;
a first recycle line configured to recycle a first portion of the lean solvent stream to the absorber column; and
a second recycle line configured to recycle a second portion of the lean solvent stream to the alkylation reactor.