Write George Cody at the Geophysical Lab. He may still have some of the original silicalite that Tom Hoering used back in the olden days. Marilyn From: Stable Isotope Geochemistry <[log in to unmask]> on behalf of Bob Dias <[log in to unmask]> Reply-To: Stable Isotope Geochemistry <[log in to unmask]> Date: Friday, December 8, 2017 at 1:59 PM To: <[log in to unmask]> Subject: [ISOGEOCHEM] ZSM-5 and silicalite... We want to remove n-alkanes from petroleum fractions using ZSM-5. However, the information in the literature is a bit non-committal as to the specifics of the zeolite and commonly used distributors. Can anyone send my any information you might have as to specific vendors and specific ZSM-5 type? Also, we are interested in acquiring some "silicalite" with 6A pore size. This was a Union Carbide product and we cannot find a modern day distributor in the continental US. HELP!!! Bob Dias USGS