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US 9,815,049 B2Granted
Selectivity of ionic liquid alkylation
AssigneeUop LLC
InventorsDavid S. Lafyatis, Sean G. Mueller, Zhanping Xu, Douglas A. Nafis, Robert Mehlberg, Kurt Detrick, Avram M. Buchbinder
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Abstract
A method of controlling a hydrocarbon conversion process is described. The method involves introducing a reactant into a reaction zone containing an ionic liquid catalyst. The reaction zone has at least two zones. The mass transfer resistance in the second zone is greater than the mass transfer resistance in the first zone.
Claims14
A method of minimizing secondary reactions producing undesired products in an alkylation reaction of a paraffin and an olefin comprising:
- introducing a paraffin having 3 to 8 carbon atoms and an olefin having 2 to 8 carbon atoms into an alkylation reactor containing an ionic liquid catalyst comprising ionic liquid droplets to alkylate the paraffin with the olefin to produce an alkylated product, the reaction reactor having at least two reaction zones with the second reaction zone down-stream from the first reaction zone, the first reaction zone having a first mass transfer resistance in the ionic liquid droplets and the second reaction zone having a second mass transfer resistance in the ionic liquid droplets greater than the first mass transfer resistance, wherein the second mass transfer resistance is greater than the first mass transfer resistance by changing the first mass transfer resistance, the second mass transfer resistance, or both;
- wherein the first mass transfer resistance, the second mass transfer resistance, or both are changed by at least one of:
- by changing a size of droplets of the ionic liquid catalyst;
- by changing a viscosity of the ionic liquid catalyst;
- and
- by adjusting fresh/regenerated ionic liquid catalyst to reaction zones.
3 more elements
Dependencies are inferred from the claim text.