Abstract: An eco-friendly synergistic heterogeneous solid catalyst for use in reactions such as alkylation, acylation, oligomerization, isomerization, hydration, dehydration, etherification, esterification, hydrocracking and nitration of organic compounds comprising: a synergistic combination of sulfated metal oxide and mesoporous zeotypes comprising: Silicon (Si) 50-60 wt %, Zirconium (Zr) 40-50 wt %, Sulfur (S) 5-10 wt % and having a surface area in the range of 200-500 m2/g; a pore volume in the range of 0.1-0.3 m3/g; a pore diameter in the range of 25-35 Å; and a XRD peak at 2&thgr; being 0-3. The invention also covers the process of manufacture of the above catalysts and its use in particular for producing oligomers from alpha-olefins, Friedel-Crafts alkylation and acylation reactions.