A process for processing plastic waste comprising: (a) converting a plastic waste to a hydrocarbon liquid stream and a first C 1 to C 4 gas stream in a pyrolysis unit; (b) contacting at least a portion of the hydrocarbon liquid stream with a first hydroprocessing catalyst in the presence of hydrogen in a hydroprocessing unit to yield a first hydrocarbon product and a second C 1 to C 4 gas stream, wherein the first hydrocarbon product comprises C 5 + liquid hydrocarbons; (c) introducing at least a portion of the first hydrocarbon product to a first separating unit to produce a treated hydrocarbon stream and a first heavies stream, wherein the treated hydrocarbon stream comprises C 5 to C 8 hydrocarbons, and wherein the first heavies stream comprises C 9 + hydrocarbons; (d) contacting at least a portion of the first heavies stream with a second hydroprocessing catalyst in the presence of hydrogen in a hydrodealkylating unit to yield a second hydrocarbon product and a third C 1 to C 4 gas stream, wherein the second hydrocarbon product comprises C 5 + liquid hydrocarbons, and wherein an amount of C 6 to C 8 aromatic hydrocarbons in the second hydrocarbon product is greater than an amount of C 6 to C 8 aromatic hydrocarbons in the first heavies stream; (e) conveying at least a portion of the second hydrocarbon product to the first separating unit; (f) feeding at least a portion of the treated hydrocarbon stream to a steam cracker to produce a steam cracker product stream, wherein an amount of olefins in the steam cracker product stream is greater than an amount of olefins in the treated hydrocarbon stream; (g) introducing at least a portion of the steam cracker product stream to a second separating unit to produce an olefin gas stream, a saturated hydrocarbons gas stream, an aromatics stream, and a second heavies stream; wherein the olefin gas stream comprises ethylene, propylene, butylenes, butadiene, or combinations thereof; wherein the saturated hydrocarbons gas stream contains methane, ethane, propane, butanes, hydrogen, or combinations thereof; wherein the aromatics stream comprises C 6 to C 8 aromatic hydrocarbons; and wherein the second heavies stream comprises C 5 + hydrocarbons other than C 6 to C 8 aromatic hydrocarbons; and (h) conveying at least a portion of the second heavies stream to the hydroprocessing unit. (a) converting a plastic waste to a hydrocarbon liquid stream and a first C 1 to C 4 gas stream in a pyrolysis unit; (b) contacting at least a portion of the hydrocarbon liquid stream with a first hydroprocessing catalyst in the presence of hydrogen in a hydroprocessing unit to yield a first hydrocarbon product and a second C 1 to C 4 gas stream, wherein the first hydrocarbon product comprises C 5 + liquid hydrocarbons; (c) introducing at least a portion of the first hydrocarbon product to a first separating unit to produce a treated hydrocarbon stream and a first heavies stream, wherein the treated hydrocarbon stream comprises C 5 to C 8 hydrocarbons, and wherein the first heavies stream comprises C 9 + hydrocarbons; (d) contacting at least a portion of the first heavies stream with a second hydroprocessing catalyst in the presence of hydrogen in a hydrodealkylating unit to yield a second hydrocarbon product and a third C 1 to C 4 gas stream, wherein the second hydrocarbon product comprises C 5 + liquid hydrocarbons, and wherein an amount of C 6 to C 8 aromatic hydrocarbons in the second hydrocarbon product is greater than an amount of C 6 to C 8 aromatic hydrocarbons in the first heavies stream; (e) conveying at least a portion of the second hydrocarbon product to the first separating unit; (f) feeding at least a portion of the treated hydrocarbon stream to a steam cracker to produce a steam cracker product stream, wherein an amount of olefins in the steam cracker product stream is greater than an amount of olefins in the treated hydrocarbon stream; (g) introducing at least a portion of the steam cracker product stream to a second separating unit to produce an olefin gas stream, a saturated hydrocarbons gas stream, an aromatics stream, and a second heavies stream; wherein the olefin gas stream comprises ethylene, propylene, butylenes, butadiene, or combinations thereof; wherein the saturated hydrocarbons gas stream contains methane, ethane, propane, butanes, hydrogen, or combinations thereof; wherein the aromatics stream comprises C 6 to C 8 aromatic hydrocarbons; and wherein the second heavies stream comprises C 5 + hydrocarbons other than C 6 to C 8 aromatic hydrocarbons; and (h) conveying at least a portion of the second heavies stream to the hydroprocessing unit.