Bp Corporation North America Inc.

Brian Slusar

Craig Colling

Scott Roberts

Richard Wilsak

Jeffrey Amelse

Steven Norwood

Chyau Lin

Jeffrey Allen Amelse

Toluene disproportionation and C9/C10 transalkylation are a significant source of xylenes in a modern aromatics complex. Methods and apparatuses for improving the energy efficiency of these disproportionation and transalkylation processes are provided.

Heat integration in disproportionation or transalkylation processes

Processes for recovering paraxylene from at least two feedstreams containing xylene isomers. The process includes directing to a paraxylene recovery zone comprising at least one crystallization zone, a paraxylene-lean feedstream having a paraxylene to total xylene isomer ratio of 0.50 or less, and also directing to the paraxylene recovery zone, a paraxylene-rich feedstream having a paraxylene to total xylene isomer ratio of greater than 0.50. A paraxylene-containing product stream is recovered from the paraxylene recovery zone having a paraxylene to total xylene isomer ratio greater than that of the paraxylene-rich feedstream. The process provides improvements in paraxylene recovery efficiency and/or cost effectiveness.

Process for recovering paraxylene from at least two feedstreams containing xylene isomers

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Winfield, IL, United States of America

Brian Slusar