Aluminum-pillared clays based on synthetic beidellite have been prepar
ed by exchanging hydrothermally synthesized beidellite with partly hyd
rolyzed aluminum nitrate solution followed by calcination. It is shown
that a catalyst containing 50 wt% amorphous silica and 50 wt% pillare
d beidellite loaded with 0.8 wt% Pt has an n-heptane hydroconversion c
omparable to a commercially available silica-alumina and does not sign
ificantly deactivate with increasing time on stream (within 14 h).