A. Saus, E. Schmidl
Jul 1, 1985
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0
Influential Citations
18
Citations
Journal
Journal of Catalysis
Abstract
Abstract The application of benzyl sulfonic acid siloxane (BSS) for the oligomerization of isobutene and the scission of oligomers has been investigated. Under suitable reaction conditions (130 °C, normal pressure) the conversion of isobutene is quantitative and yields 52 wt% of di-, 40 wt% of tri- and 3 wt% of tetraisobutene besides a maximum of 2 wt% of odd-numbered products, consisting of 5-, 7-, 9-, 11-, 13-, and 15-C atoms. At temperatures up to 200 °C the conversion of isobutene decreases to 35% due to pseudoequilibria between the initial oligomerization products and their splitting products, yielding a ratio of oligomers of di:tri:tetraisobutylene of 130:40:1. Over a period of 120 h operation at 130 °C the catalyst activity decreases by 50% due to partial loss of sulfonic groups and deactivation of some of the groups which remain.