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AssigneeExxonMobil Chemical Patents Inc.
InventorsCatherine M. Dorsi, Gaurav Agrawal, Michael W. Weber, Dana L. Pilliod, John R. Porter
Estimating the term…
Disclosed herein are processes for recovering paraxylene in which a first simulated moving bed adsorption unit is used to produce a paraxylene-rich extract stream that also contains a significant amount of the ethylbenzene and a paraxylene-depleted raffinate stream. Because a significant amount of the ethylbenzene is removed in the paraxylene-rich extract stream (at least enough to limit buildup in the isomerization loop), the paraxylene-depleted raffinate stream may be isomerized in the liquid phase. Avoiding vapor phase isomerization saves energy and capital, as liquid phase isomerization requires less energy and capital than the vapor phase isomerization process due to the requirement of vaporizing the paraxylene-depleted stream and the use of hydrogen, which requires an energy- and capital-intensive hydrogen recycle loop.
A process for recovering paraxylene, the process comprising:
A process for recovering paraxylene, the process comprising:
A process for recovering paraxylene, the process comprising:
Dependencies are inferred from the claim text.