Adsorbent for contaminant removal from C4 hydrocarbons
AssigneeUop LLC
InventorsStephen R. Caskey, Munish Kumar Sharma, Jayant K. Gorawara, Pijus Kanti Roy, Frank S. Modica
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Abstract
A process is provided for removing contaminants from olefin containing C4 streams. The streams are contacted with an X based zeolite adsorbent comprising greater than 88% X zeolite at a SiO2/Al2O3 ratio of less than 2.5 and an alkali metal salt present in excess of an amount required to achieve full exchange of cation sites on the X based zeolite. The resulting alkali oxide on a volatile free basis is less than 1% (by mass) of the X based adsorbent. The contaminants that are removed include sulfur, oxygenate, and nitrogen based contaminants.
Claims20
A process for removing contaminants from olefin containing C4 streams comprising contacting said olefin containing C4 streams with an X based zeolite adsorbent wherein the X based zeolite adsorbent comprises:
- >88% alkali metal cation form of X zeolite having a SiO2/Al2O3 ratio of less than 2.5, wherein Al content has been fully charge balanced by an addition of the alkali metal cation:
- and
- less than 1% (by mass) additional alkali oxide on a volatile free basis.
Dependencies are inferred from the claim text.