GLYPTAL SYNTHESIS FROM GLYCEROL AND PHTHALIC ANHYDRIDE USING ACTIVATED ZEOLITE &lt;br&gt; AS HETEROGENEOUS CATALYST AND ITS COMPARISON TO HOMOGENEOUS p-TOLUENESULFONIC &lt;br&gt; ACID CATALYST
Jurnal Bahan Alam Terbarukan /Jurnal Bahan Alam Terbarukan