Abstract
Different aluminum phosphates (AP) were prepared and examined from viewpoint of not only the selectivity but the specific activity for cis-2-butene isomerization. Amorphous AP catalysts were more active than crystalline AP catalysts. The selectivity (initial trans-2-butene/1-butene ratio) of an AP catalyst was sensitive to residual phosphate ions on the surface, but the selectivity was independ of whether the AP is X-ray amorphous or crystalline.
