A process for producing an individual xylene isomer from feed streams containing C 8 aromatics and C 9 -and-heavier aromatics, comprising: (a) a distillation process comprising two xylene columns separating C 8 aromatics from C 9 -and-heavier aromatics contained in at least one lower-boiling feed stream and at least one higher-boiling feed stream, wherein the at least one higher-boiling feed stream has a higher content of C 9 -and-heavier aromatics than the at least one lower-boiling feed stream, the distillation process comprising: distilling the at least one higher-boiling feed stream in a first xylene column at a first pressure to separate a first C 8 -aromatics stream from a first C 9 -and-heavier aromatics stream, distilling the at least one lower-boiling feed stream in a second xylene column at a second pressure to separate a second C 8 -aromatics stream from a second C 9 -and-heavier aromatics stream, wherein the second pressure is higher than the first pressure, and an overhead stream from the second xylene column exchanges heat with a reboiler of the first xylene column; (b) a xylene-isomer separation process to recover the individual xylene isomer from one or both of the first and second C 8 -aromatics streams by injecting the one or both C 8 -aromatics streams and a desorbent stream into an adsorption process to obtain a first mixture comprising the individual xylene isomer and desorbent and a second mixture comprising a raffinate and desorbent; and (c) a desorbent-recovery process to separate the first mixture of step (b) by distilling the first mixture in an extract column at an operating pressure of at least 300 kPa to produce a stream comprising the individual xylene isomer and a desorbent stream, and returning the desorbent stream to the xylene-isomer separation process; wherein an overhead stream of the first xylene column of step (a) provides heat to a reboiler of the extract column. (a) a distillation process comprising two xylene columns separating C 8 aromatics from C 9 -and-heavier aromatics contained in at least one lower-boiling feed stream and at least one higher-boiling feed stream, wherein the at least one higher-boiling feed stream has a higher content of C 9 -and-heavier aromatics than the at least one lower-boiling feed stream, the distillation process comprising: distilling the at least one higher-boiling feed stream in a first xylene column at a first pressure to separate a first C 8 -aromatics stream from a first C 9 -and-heavier aromatics stream, distilling the at least one lower-boiling feed stream in a second xylene column at a second pressure to separate a second C 8 -aromatics stream from a second C 9 -and-heavier aromatics stream, wherein the second pressure is higher than the first pressure, and an overhead stream from the second xylene column exchanges heat with a reboiler of the first xylene column; (b) a xylene-isomer separation process to recover the individual xylene isomer from one or both of the first and second C 8 -aromatics streams by injecting the one or both C 8 -aromatics streams and a desorbent stream into an adsorption process to obtain a first mixture comprising the individual xylene isomer and desorbent and a second mixture comprising a raffinate and desorbent; and (c) a desorbent-recovery process to separate the first mixture of step (b) by distilling the first mixture in an extract column at an operating pressure of at least 300 kPa to produce a stream comprising the individual xylene isomer and a desorbent stream, and returning the desorbent stream to the xylene-isomer separation process; wherein an overhead stream of the first xylene column of step (a) provides heat to a reboiler of the extract column.