Naphthenes fluid catalytic cracking

Olefins crack more readily than paraffins since double C=C bonds are more friable under reaction conditions. Iso-paraffins and naphthenes are cracked more readily than normal paraffins, which in turn are cracked more readily than aromatics. In fact, aromatic ring compounds are very resistant to cracking, since they readily deactivate fluid cracking catalysts by blocking the active sites of the catalyst (see the next part). The reactions postulated for olefin compounds apply principally to intermediate products within the reactor system, since the olefin content of catalytic cracking feedstock is usually very low. 

Trade Names Drakesol 205 Exxsol D130 Isopar V Fluid Petroleum distillates, hydrotreated (mild) heavy naphthenic. See Petroleum distillates, heavy hydrotreated naphthenic Petroleum distillates, intermediate catalytic cracked. See Naphtha, heavy aromatic... 

---