Process for separating naphthalene from substituted benzene hydrocarbons
AssigneeUop LLC
InventorsSanti Kulprathipanja, Kenneth Kuhnle, Marjorie S. Patton, Richard L. Fergin
Life of this patent
Estimating the term…
Abstract
The separation of naphthalene in high purity from coal tar or petroleum fractions by an adsorptive chromatographic process and liquid phase with lithium-exchanged X zeolite as the adsorbent and aromatic desorbents.
Claims5
A process for separating naphthalene from a hydrocarbon mixture comprising naphthalene, substituted monocyclic aromatic hydrocarbons and paraffins boiling in the range from 200.degree. to 250.degree. C., said process comprising contacting said mixture at adsorption conditions with an adsorbent consisting essentially of an X zeolite exchanged with lithium cations at exchangeable sites thereby selectively adsorbing said naphthalene thereon, removing said monocyclic aromatic hydrocarbons and paraffins from contact with said adsorbent and desorbing said naphthalene with a liquid aromatic desorbent having a boiling point at least 5.degree. C. higher or lower than the boiling point range of said hydrocarbon mixture.
Dependencies are inferred from the claim text.