Reduction of the content of compounds containing oxygen...

Details Reduction of the content of compounds containing oxygen... Reduction of the content of compounds containing oxygen...

2008-07-15

2008-07-15

Nguyen, Tam M. (Department: 1797)

Mineral oils: processes and products

Refining

Nitrogen contaminant removal

C208S263000, C585S820000, C585S824000

Reexamination Certificate

active

10556091

ABSTRACT:
A process for reducing the content of oxygen-containing and/or nitrogen-containing compounds in streams having an isobutene content of at least 10% by weight, which comprises passing the stream in the liquid state at a temperature T [in K] and a linear velocity v [in cm/min] over a fixed bed of an acid-free zeolite having a mean pore size of from 0.3 to 1.5 nm, where the fixed bed has a length l [in cm] in the flow direction of the stream and T, v and l obey the relationshipin-line-formulae description="In-line Formulae" end="lead"?2(T−283 K)/10 K·l/v≦500 min,in-line-formulae description="In-line Formulae" end="tail"?is described. The process avoids the formation of isobutene oligomers.

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