Integrated process for optimum production of para-xylene

A system for producing para-xylene (p-xylene) from a reformate feed, the system comprising:

• a reformate splitter, the reformate splitter configured to separate the reformate feed, wherein the reformate feed comprises aromatic hydrocarbons, wherein the aromatic hydrocarbons are selected from the group consisting of benzene, toluene, mixed xylenes, carbon-nine plus (C9+) aromatic hydrocarbons, and combinations of the same, wherein the reformate splitter produces a light gases stream, a combined heavy stream, a benzene stream, a xylene stream, and a toluene stream, wherein the combined heavy stream comprises the C9+ aromatic hydrocarbons, and wherein the xylene stream comprises the mixed xylenes, wherein the mixed xylenes comprises p-xylenes;
• a dealkylation reactor fluidly connected to the reformate splitter, the dealkylation reactor configured to convert the C9+ aromatic hydrocarbons to carbon-six (C6) to carbon-eight (C8) aromatic hydrocarbons in the presence of a dealkylation catalyst to produce a dealkylation effluent, wherein the dealkylation reactor is at a dealkylation temperature, wherein the dealkylation reactor is at a dealkylation pressure, wherein the dealkylation effluent comprises aromatic hydrocarbons such that an amount of C9+ aromatic hydrocarbons in the dealkylation effluent is less than the amount of C9+ aromatic hydrocarbons in the reformate feed;
• a dealkylation splitter fluidly connected to the dealkylation reactor, the dealkylation splitter configured to separate the dealkylation effluent to produce a light recycle stream, a C10+ aromatics stream, and a C9 stream;
• a transalkylation reactor fluidly connected to the dealkylation reactor and fluidly connected to the reformate splitter, the transalkylation reactor configured to convert toluene and C9 aromatic hydrocarbons in the presence of a transalkylation catalyst to produce a transalkylation effluent, wherein the transalkylation reactor is at a transalkylation temperature, wherein the transalkylation reactor is at a transalkylation pressure, wherein the toluene is supplied by a toluene split stream, wherein the toluene split stream is separated from the toluene stream, wherein the transalkylation catalyst is operable to catalyze transalkylation reactions, wherein the transalkylation effluent comprises C6 to C9+ aromatic hydrocarbons;
• a p-xylene separation unit fluidly connected to the reformate splitter, the p-xylene separation unit configured to separate p-xylenes from the xylene stream to produce a p-xylene product and a p-xylene depleted stream, wherein the p-xylene product comprises p-xylenes, wherein the p-xylene depleted stream comprises meta-xylene (m-xylene) and ortho-xylene (o-xylene);
• and
• an isomerization unit fluidly connected to the p-xylene separation unit, wherein the isomerization unit is configured to convert the m-xylene and o-xylene in the p-xylene depleted stream to produce an isomerization effluent, wherein the isomerization unit is at an isomerization temperature, wherein the isomerization unit is at an isomerization pressure, wherein the isomerization effluent comprises C8 aromatic hydrocarbons.