Xylene production processes and systems

A system for producing para-xylene (PX), the system comprising:

• a catalytic reformer configured to produce a reformate stream comprising C6+ aromatic hydrocarbons from a naphtha feedstock;
• a first separation system downstream of the catalytic reformer, wherein the first separation system is configured to separate the reformate stream into at least a toluene containing stream and a C8+ hydrocarbon containing stream;
• a de-methylation unit configured to receive the C8+ hydrocarbon containing stream and convert at least 50 wt % of the ethylbenzene (EB) within the C8+ hydrocarbon containing stream into toluene;
• a toluene methylation unit downstream of the first separation system and the de-methylation unit, wherein the toluene methylation unit is configured to receive the toluene containing stream and toluene converted from EB in the de-methylation unit, and to react toluene with a methylating agent to produce xylenes that are emitted from the toluene methylation unit as a methylated effluent stream;
• a second separation system downstream of the toluene methylation unit, wherein the second separation system is configured to recover PX from the methylated effluent stream and produce a PX depleted stream;
• and
• a transalkylation unit downstream of the second separation system, wherein the transalkylation unit is configured to transalkylate the PX depleted stream and produce a transalkylation effluent stream that has a higher concentration of toluene than the PX depleted stream.