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Pillared Clays and Micas

Published online by Cambridge University Press:  28 February 2011

Jack W. Johnson and
John F. Brody
Jack W. Johnson
Affiliation:
Corporate Research, Exxon Research and Engineering, Annandale, NJ 08801
John F. Brody
Affiliation:
Corporate Research, Exxon Research and Engineering, Annandale, NJ 08801
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Abstract

The interest in the petroleum industry in converting heavier feeds to liquid fuels has led to a search for microporous materials with pore sizes larger than those found in the faujasitic zeolites which form the basis of many petroleum processing catalysts. Materials with zeolite-like pores in the 10 Å range can be synthesized by intercalating large polyoxocations between the layers of smectite clays. Subsequent calcination dehydrates the cations and converts them into oxide pillars that prop the clay layers apart, resulting in permanent microporosity in the interlayer region. Pillared clays have been studied extensively during the last decade due to their potential use in petroleum processing as cracking and hydrocracking catalysts. Previous workers have primarily utilized smectite clays such as montmorillonite and hectorite as the starting layered material for pillared clay. We now report that synthetic fluoromicas, clay-like materials of layer charge density higher than that of smectites, can also be pillared with polyoxoaluminum cations to form aluminapillared fluoromicas that are thermally stable up to 700°C.

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Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 111: Symposium O – Microstructure and Properties of Catalysts , 1987, 257
Copyright
Copyright © Materials Research Society 1988

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