| Popis: |
The skeletal isomerization of n-butene, catalyzed by boron phosphate, silicated boron phosphate, silicated alumina and boron phosphate supported on both alumina and silicated alumina was studied at 475°C. The silication of the boron phosphate seems to stabilize the surface area and substantially improves the catalytic abilities of the system. In the isomerization reaction, the silicated boron phosphate maintained high selectivity throughout the run, in opposition to the non-silicated catalyst. Furthermore, analysis of higher by products (C5+) is of great importance concerning the selectivity of the catalysts. Silicated boron phosphate produce mainly C8 as by products, while silicated alumina cracks the higher compounds to C5, C6, C7 etc. |
