Recovery of high octane components from isomerates
AssigneeUop LLC
InventorsBeth McCulloch, James R. Lansbarkis, Hemant P. Agrawal
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Abstract
An adsorption process for separating the high octane components, including multi-branched paraffins and isopentane of a C.sub.5 -C.sub.6 isomerate from lower octane monobranched and normal paraffin components by contacting the isomerate with an X zeolite exchanged with a mixture of at least two cations from Group II-A. The adsorbed low octane components are preferably desorbed with a desorbent selected from the group consisting essentially of isooctane, 2,2,3-trimethyl pentane, 2,2,4-trimethyl pentane, 2,3,4-trimethyl pentane, 1,2-dimethyl cyclohexane, 2,2-dimethyl hexane, 2,2-dimethyl octane, 3-ethyl hexane, 2,2,4-trimethyl hexane and mixtures thereof.
Claims12
A continuous process for separating higher octane components comprising dimethyl paraffins (DMP's) and iso-paraffins from a C.sub.5 and C.sub.6 feed mixture containing DMP's, monomethyl paraffins, including isopentane, and normal paraffins comprising contacting at adsorption conditions said feed mixture with an adsorbent comprising an X zeolite molecular sieve exchanged with at least two cations, each selected from Group IIA metals, at the exchangeable sites to selectively adsorb said monoalkyl paraffins, except isopentane, and normal paraffins, removing said DMP's and isopentane from said adsorbent and desorbing the adsorbed monoalkyl paraffins and normal paraffins.
Dependencies are inferred from the claim text.