HYDROGENATION PROCESS OF OLEFIN POLYMERS FOR PRODUCING WHITE OILS

摘要

A process for hydrogenating polymers which are derived from olefin units containing 4 carbon atoms is disclosed whereby white oils which exhibit a low iodine value (e.g., below 0.26) are obtained under relatively mild reaction conditions. The hydrogenation is effected in the presence of a catalyst comprising a noble metal selected from the group of platinum and palladium on an alumina support exhibiting a total pore volume of at least about 0.25 ml/g wherein if the noble metal is platinum, about 90 to about 98% of the pore volume is provided by pores the mean size of which is less than 100.ANG., and if the noble metal is palladium, about 35 to about 50% of the pore volume is provided by small size pores the mean size of which is less than 300.ANG. + 50.ANG. and about 25 to about 35% of the pore volume is provided by large size pores the mean size of which is above 300.ANG. + 50.ANG. with the mean size of the large size pores being at least 1.5 times the mean size of the small size pores.