Exxon Research and Engineering Company

Owen C Feeley

David E Vaughan

Gary Brice McVicker

Karl Gottlieb Strohmaier

Michel A Daage

Edward Stanley Ellis

Bruce R Cook

Michele Sue Touvelle

Sylvain S Hantzer

Joseph Ernest Baumgartner

Carl W Hudson

Darryl P Klein

A method for preparing novel zeolitic catalyst compositions having a high Si/Al ratio and a crystallinity of at least about 70%. The method involves cation exchanging an as synthesized faujasite material having an Si/Al greater than about 4 with a component selected from the group consisting of ammonium ions and mineral acids, then steam calcining said cation exchanged faujasite in a single steam calcination step at a temperature from about 900.degree. F. to about 1 500.degree. F.

Method for preparing high silica faujacitic zeolites

Naphthenic rings in naphthenic ring-containing compounds in a feedstream are selectively opened wherein at least about 50 wt. % of the ring compounds in the feedstream are characterized as containing at least one C.sub.6 ring having at least one substituent containing 3 or more carbon atoms. The naphthenic rings are opened without significant dealkylation of any pendant substituents on the ring. The feedstream, containing such compounds, is contacted with a supported catalyst containing a metal selected from Ir, Ru, or a mixture thereof, which catalyst when reacted with a feed comprised of 20 wt. % n-butylcyclohexane in heptane diluent will result in: a) at least a 10% yield of C.sub.10 paraffin yield/%C.sub.10 ring disappearance.

Process for selectively opening naphthenic rings

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Baton Rouge, LA, United States of America

Owen C Feeley