Abstract: The new generation catalyst RIW-2 for hydroisomerization and dewaxing of lube base oil was developed by SINOPEC Research Institute of Petroleum Processing, which exhibited high hydroisomerization selectivity and dewaxing activity, good toxicity resistance and feed adaptability and was better than the reference catalysts. The comprehensive tests were conducted to investigate its performance and process conditions. The results showed that there was an optimal temperature for the paraffin isomerization, with the reaction temperature increase, more multi-methyl iso-paraffin were formed; lower hydrogen partial pressure was benefit for the isomerization reaction along with the dehydrogenation of cycloparaffin, leading to more aromatics. The industrial application results showed that using hydrocracking tail oils as raw materials, the API Ⅲ base oil with viscosity index greater than 120 could be produced with the yield greater than 70%.

Key words: isodewaxing, catalyst, lube base oil