Patent Number: 6,166,278

Title: Use of naturally acid smectites to remove olefins from aromatics or aromatic mixtures and processes therewith

Abstract: A catalyst for removing olefins from aromatic compounds or mixtures of aromatic compounds wherein the catalyst is a naturally acidic smectite clay containing exchangeable cations wherein the naturally acidic smectite clay has a cation exchange capacity of 40 to 80 meq./100 g. and wherein the exchangeable cations include 5 to 70 meq./100 g. of Al.sup.3+ cations, a process for the preparation of this catalyst including treating a naturally acidic smectite clay with an aluminum salt solution wherein the salt solution includes Al.sup.3+ ions at a concentration of at least 10 meq./100 g. of the catalyst, and a process for the removal of olefins from aromatic compounds or mixtures of aromatic compounds using the above-described catalyst.

Inventors: Engelhardt; Thomas (Freising, DE), Flessner; Uwe (Munchen, DE), Hahn; Reinhard (Vilsheim, DE), Zschau; Werner (Steinebach, DE)

Assignee: Sud-Chemie A.G.

International Classification: B01J 21/16 (20060101); B01J 21/00 (20060101); C07C 7/00 (20060101); C07C 7/148 (20060101); C07C 007/163 ()

Expiration Date: 12/26/2013