Chemistry of hydrocarbon compounds – Purification – separation – or recovery – By contact with solid sorbent
Reexamination Certificate
2008-06-30
2010-10-26
Nguyen, Tam M (Department: 1797)
Chemistry of hydrocarbon compounds
Purification, separation, or recovery
By contact with solid sorbent
C585S820000, C585S828000
Reexamination Certificate
active
07820869
ABSTRACT:
Adsorbents and methods for the adsorptive separation of para-xylene from a mixture containing at least one other C8aromatic hydrocarbon (e.g., a mixture of ortho-xylene, meta-xylene, para-xylene, and ethylbenzene) are described. Suitable binderless adsorbents (e.g., formulated with the substantial absence of an amorphous material that normally reduces selective pore volume), particularly those with a water content from about 3% to about 5.5% by weight, improve capacity and/or mass transfer. These properties are especially advantageous for improving productivity in low temperature, low cycle time adsorptive separation operations in a simulated moving bed mode.
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Cheng Linda Shi
Commissaris Scott E.
Hurst Jack E.
Johnson, Sr. Darryl M.
Kulprathipanja Santi
Nguyen Tam M
Piasecki David J
UOP LLC
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