Thermally stable porous aluminophosphates (ICMUV-3) with P/Al molar ratios
in the range 0.15 less than or equal to P/Al less than or equal to 0.75 and
showing continuously adjustable pore sizes from 13 to 37 Angstrom have bee
n prepared through a surfactant-assisted procedure without changing the sur
factant length and/or addition of organic expansors.