United Kingdom Atomic Energy Authority

John D Ramsay

James A Cairns

James L Woodhead

A catalyst suitable for use in the treatment of motor vehicle exhaust emissions is made by contacting a substrate, preferably of an aluminium bearing ferritic alloy, with a first sol of refractory material followed by drying and firing, and preferably then contacting with a second sol of refractory material, which additionally contains a salt convertible to catalytic material, followed by drying and firing. The sols are obtained from refractory material, e.g., alumina, made by a vapor phase condensation method.

Method of preparing a catalyst

The invention relates to gels produced by dispersing solid primary particles of an inorganic substance in a liquid to form a sol containing colloidal particles which are aggregates of the primary particles and drying the sol to produce a porous gel. The gels find applications in chromatography. Calcined gels give porous ceramic materials suitable for use as catalyst supports.

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Abingdon, United Kingdom

John D Ramsay