Integrated process for gasoline production

An integrated process comprising:

• introducing a feed comprising n-C5 hydrocarbons to a disproportionation reaction zone in the presence of an ionic liquid disproportionation catalyst comprising an ionic liquid, wherein the ionic liquid is homogeneous and unsupported, under disproportionation reaction conditions to form a disproportionation mixture comprising iso-C4 and C6+ disproportionation products and unreacted n-C5 hydrocarbons;
• introducing an iso-C4 hydrocarbon stream and an olefin feed stream comprising at least one of ethylene, propylene, and butenes into an all reaction zone in the presence of an ionic liquid alkylation catalyst comprising an ionic liquid under alkylation reaction conditions to produce an alkylation mixture comprising alkylate products and unreacted iso-C4 paraffins;
• combining the disproportionation mixture and the alkylation mixture to form a combined mixture;
• separating the combined mixture into at least a stream comprising the alkylate products and the C6+ disproportionation products, an iso-C4 stream comprising the iso-C4 disproportionation products and the unreacted iso-C4 paraffins, and a stream comprising the unreacted n-C5 hydrocarbons;
• recycling the iso-C4 stream to the alkylation reaction zone wherein the iso-C4 stream comprises the iso-C4 hydrocarbon stream;
• recycling the stream comprising the unreacted n-C5 hydrocarbons to the disproportionation reaction zone;
• recovering the stream comprising the alkylate products and the C6+ disproportionation products;
• introducing fresh ionic liquid disproportionation catalyst and fresh ionic liquid alkylation catalyst into the disproportionation reaction zone and the alkylation reaction zone, respectively;
• removing used ionic liquid disproportionation catalyst and used ionic liquid alkylation catalyst from the disproportionation reaction zone and the alkylation reaction zone, respectively;
• regenerating at least a portion of (i) the used ionic liquid disproportionation catalyst and (ii) the used ionic liquid alkylation catalyst in a regeneration zone to produce a regenerated ionic liquid catalyst;
• and
• recycling a first portion of the regenerated ionic liquid catalyst to the disproportionation reaction zone and recycling a second portion of the regenerated ionic liquid catalyst to the alkylation reaction zone.

An integrated process comprising:

• introducing a feed comprising n-C5 hydrocarbons to a disproportionation reaction zone in the presence of an ionic liquid disproportionation catalyst comprising an ionic liquid, wherein the ionic liquid is homogeneous and unsupported, under disproportionation reaction conditions to form a disproportionation mixture comprising iso-C4 and C6+ disproportionation products and unreacted n-C5 hydrocarbons;
• introducing an iso-C4 hydrocarbon stream and an olefin feed stream comprising at least one of ethylene, propylene, and butenes into an all reaction zone in the presence of an ionic liquid alkylation catalyst comprising an ionic liquid under alkylation reaction conditions to produce an alkylation mixture comprising alkylate products and unreacted iso-C4 paraffins;
• combining the disproportionation mixture and the alkylation mixture to form a combined mixture;
• separating the combined mixture into at least a stream comprising the alkylate products, an iso-C4 stream comprising the iso-C4 disproportionation products and the unreacted iso-C4 paraffins, and a stream comprising the unreacted n-C5 hydrocarbons;
• recycling the iso-C4 stream to the alkylation reaction zone wherein the iso-C4 stream comprises the iso-C4 hydrocarbon stream;
• recycling the stream comprising the unreacted n-C5 hydrocarbons to the disproportionation reaction zone;
• recovering the stream comprising the alkylate products;
• introducing fresh ionic liquid disproportionation catalyst into the disproportionation reaction zone;
• removing a stream of used ionic liquid disproportionation catalyst from the disproportionation reaction zone after forming the disproportionation mixture
• introducing at least a portion of the stream of used ionic liquid disproportionation catalyst into the alkylation reaction zone, wherein the at least a portion of the stream of used ionic liquid disproportionation catalyst comprises the ionic liquid alkylation catalyst;
• removing a stream of further used ionic liquid alkylation catalyst from the alkylation reaction zone after producing the alkylation mixture;
• regenerating at least a portion of the stream of further used ionic liquid alkylation catalyst from the alkylation reaction zone in a regeneration zone to produce a regenerated ionic liquid catalyst;
• and
• recycling the regenerated ionic liquid catalyst to the disproportionation reaction zone.