Isomerization process, total, paraffin separation

The normai isoparaffin separation process used most often is the Union Carbide IsoSiv process. Units with feed capacities of up to 3600 metric tons/day have been built. In the mid-1970 s the Hysomer paraffin-isomerization process, developed by Shell Research B.V., was combined with the IsoSiv process in such a way that normal paraffins are nearly completely isomerized. The combination is t led the Total Isomerization Process (TIP) and is shown schematically in Fig. 12.5-7. Product from a TIP unit has a Research Octane Numter of 88-92, compared to 79-82 for the product from a Hysomer unit alone. 

Total Isomerization Also called TIP. An integrated process which combines light paraffin isomerization, using a zeolite catalyst, with the IsoSiv process, which separates the unconverted normal paraffins so that they can be returned to the reactor. Developed by Union Carbide Corporation and now licensed by UOP. The first plant was operated in Japan in 1975 by 1992, more than 25 units had been licensed. 

---