A method for forming a C8 aromatic stream with a selected amount of C9 aromatics, the method comprising the steps of: fractionating a hydrocarbon stream including C8 aromatics and C9 aromatics into a sidedraw fraction including a portion of the C8 aromatics and a portion of the C9 aromatics, and a bottom fraction including remaining C8 aromatics and C8 + hydrocarbons; fractionating the bottom fraction and forming a heavy overhead fraction including the remaining C8 aromatics; and combining the sidedraw fraction and the heavy overhead fraction to form a combined stream having a C9 aromatics composition of from 0.1 wt% to 5 wt%; the method further comprising: feeding the combined stream containing C8 aromatics and C9 aromatics to a separation unit; contacting the combined stream with an adsorbent in the separation unit and adsorbing a selected xylene isomer from the combined stream to form an extract stream and a raffinate stream, wherein the extract stream comprises adsorbed xylene isomer and a portion of C9 aromatics and the raffinate stream comprises non-selected xylene isomers and the remaining portion of C9 aromatics; contacting the adsorbed xylene isomer with a desorbent and desorbing the selected xylene isomer from the adsorbent to form a stream of desorbent and the selected xylene isomer, wherein the desorbent is a light desorbent; and separating the desorbent and the selected xylene isomer. fractionating a hydrocarbon stream including C8 aromatics and C9 aromatics into a sidedraw fraction including a portion of the C8 aromatics and a portion of the C9 aromatics, and a bottom fraction including remaining C8 aromatics and C8 + hydrocarbons; fractionating the bottom fraction and forming a heavy overhead fraction including the remaining C8 aromatics; and combining the sidedraw fraction and the heavy overhead fraction to form a combined stream having a C9 aromatics composition of from 0.1 wt% to 5 wt%; the method further comprising: feeding the combined stream containing C8 aromatics and C9 aromatics to a separation unit; contacting the combined stream with an adsorbent in the separation unit and adsorbing a selected xylene isomer from the combined stream to form an extract stream and a raffinate stream, wherein the extract stream comprises adsorbed xylene isomer and a portion of C9 aromatics and the raffinate stream comprises non-selected xylene isomers and the remaining portion of C9 aromatics; contacting the adsorbed xylene isomer with a desorbent and desorbing the selected xylene isomer from the adsorbent to form a stream of desorbent and the selected xylene isomer, wherein the desorbent is a light desorbent; and separating the desorbent and the selected xylene isomer. feeding the combined stream containing C8 aromatics and C9 aromatics to a separation unit; contacting the combined stream with an adsorbent in the separation unit and adsorbing a selected xylene isomer from the combined stream to form an extract stream and a raffinate stream, wherein the extract stream comprises adsorbed xylene isomer and a portion of C9 aromatics and the raffinate stream comprises non-selected xylene isomers and the remaining portion of C9 aromatics; contacting the adsorbed xylene isomer with a desorbent and desorbing the selected xylene isomer from the adsorbent to form a stream of desorbent and the selected xylene isomer, wherein the desorbent is a light desorbent; and separating the desorbent and the selected xylene isomer.