Adsorptive separation of aromatic isomers
AssigneeUop LLC
InventorsDonald H. Rosback, deceased, by Janice M. Gillespie, executrix
Life of this patent
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Abstract
An adsorptive separation process is disclosed for separating para-aromatic isomers from a hydrocarbon feed containing a mixture of aromatic isomers, using a crystalline aluminosilicate adsorbent which has been treated with an alkyl amine preferably an alkyl amine hydrochloride. The alkyl amine treatment substantially increases the selectivity of the adsorbent for the para-xylene isomer, relative to the heavy desorbent p-DEB, thereby improving the efficiency of the separation process.
Claims8
In a process for separating aromatic hydrocarbons from a feed containing a mixture of aromatic isomers including para-isomer, which process comprises contacting, at adsorption conditions, said feed with a Type X or Type Y zeolite which has been cation exchanged at exchangeable cationic sites with cations which make the zeolite selective for the para-isomer, to effect the selective adsorption of said para-isomer by said adsorbent, the improvement which comprises utilizing in said process a Type X or Type Y zeolite which has been treated with an alkyl amine hydrochloride or alkyl amines.
Dependencies are inferred from the claim text.