Review

Many authors have published much information about the isomerization of paraffins C5–C6 using Pt/WO3–ZrO2 materials. Nevertheless, only model feedstocks have been used. An active catalyst was developed with the aim of isomerising industrial feedstocks. This material presented stable activity during the reaction with an increase of the R.O.N. of 14 at 225 °C. The material is the first real candidate for a tungstated zirconia to be used in industry to isomerise light paraffins.