Adsorbent for aromatic hydrocarbon mixture separation
AssigneeToray Industries, Inc.
InventorsMasazumi Kanaoka, Daisuke Ogawa, Kazuyoshi Iwayama, Makoto Kihara
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Abstract
An adsorbent for separating para-isomers from C.sub.8 or C.sub.10 aromatic hydrocarbons, specifically, a faujasite zeolite wherein about 2.5 to 25 percent, based on the total exchangeable cation sites originally present within the faujasite zeolite, is decationized and metal ions at the residual cation sites are exchanged substantially with potassium and/or barium ions. The adsorbent is used in separating the para-isomer, which is isolated by desorbing from the adsorbent.
Claims7
An adsorbent for separating paraisomers from C.sub.8 or C.sub.10 aromatic hydrocarbons, or mixtures thereof, which is obtained by drying and calcining a faujasite zeolite including:
- (1) ammonium ions in the range of 2.5 to 25%, based on the total exchangeable cation sites originally present, and (2) ions selected from the group consisting of potassium and barium ions at the residual cation sites.
Dependencies are inferred from the claim text.