Process for producing para-xylene
AssigneeExxonMobil Chemical Patents Inc.
InventorsJohn Di-Yi Ou, John R. Porter
Life of this patent
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Abstract
A process for producing a PX-rich product, the process comprising: (a) providing a PX-depleted stream; (b) isomerizing at least a portion of the PX-depleted stream to produce an isomerized stream having a PX concentration greater than the PX-depleted stream and a benzene concentration of less than 1,000 ppm and a C9+ hydrocarbons concentration of less than 5,000 ppm; and (c) separating the isomerized stream by selective adsorption.
Claims4
In a PX-production process where a C8 hydrocarbon rich stream is separated into a PX-rich stream and a PX-depleted stream by fractional crystallization, and where the PX-depleted stream is subsequently isomerized to increase the concentration of PX in the PX-depleted stream for subsequent separation by selective adsorption, the improvement comprising isomerizing said PX-depleted stream in the liquid phase to produce a stream having a higher PX concentration than the PX-depleted stream, a benzene concentration of less than 300 ppm, and a C9+ hydrocarbon concentration of less than 3,000 ppm.
Dependencies are inferred from the claim text.