Intercalated clay having large interlayer spacing

摘要

Hydrothermally stable intercalated clays having interlayer (gallery) spacings of about 16 to 18 angstroms or more are provided by pillars comprising aluminum and cerium. Other pillaring metal/rare earth combinations and differing preparation conditions, such as pH, result in different interlayer spacings. Interlayer spacings of 16 to 40 or 18 to 50 angstroms may be produced.