Patent ID: 11905241
Assignee: KELLOGG BROWN & ROOT LLC
Field: Chemical engineering (Chemistry)
Classification: CPC C  B | IPC B  C

Claim 0:
1. A method of treating an olefin-containing stream comprising ethylene and one or more light components selected from the group consisting of hydrogen (H2), carbon monoxide (CO), and methane, the method comprising:
providing the olefin-containing stream comprising a 0.80 vapor fraction to an absorber column,
separating the ethylene from the one or more light components by contacting the olefin-containing stream with a hydrocarbon solvent in the absorber column operating 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 ethylene in the solvent to provide an ethylene-enriched solvent stream, wherein the solvent is an alkylation precursor,
providing the ethylene-enriched solvent stream to an alkylation reactor,
reacting the ethylene with the solvent in the alkylation reactor to produce an alkylation reactor effluent stream comprising alkylate and excess solvent,
separating the alkylation reactor effluent stream into alkylate product and a lean solvent stream,
recycling a first portion of the lean solvent stream to the alkylation reactor, wherein the amount of the first portion is controlled to maintain a predetermined ratio of solvent to olefin in the alkylation reactor to maintain an alkylation equilibrium that favors an isooctane product when reacting the ethylene with the solvent, and
recycling a second portion of the lean solvent stream to the absorber column.