Process and apparatus for para-xylene production

Details Process and apparatus for para-xylene production Process and apparatus for para-xylene production

2011-08-02

2011-08-02

Nguyen, Tam M (Department: 1771)

Chemistry of hydrocarbon compounds

Purification, separation, or recovery

By cooling of liquid to obtain solid, e.g., crystallization,...

C585S816000, C585S470000

Reexamination Certificate

active

07989672

ABSTRACT:
A process of producing PX comprising providing a C8+ feedstock, the C8+ feedstock has C8hydrocarbons and C9+ hydrocarbons, to a crystallization unit under crystallization conditions to produce a PX enriched stream having a PX concentration of at least 99.5 wt % based on the weight of the PX enriched stream, wherein the C8+ feedstock has a PX concentration of at least 70 wt % based on total weight of xylenes in the C8+ feedstock, which the C8+ feedstock having a C9+ hydrocarbons concentration in a range from 1 wppm to 10 wt % based on the total weight of the C8+ feedstock.

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