Synthesis of dodecylbenzene with benzene and 1-dodecene catalyzed by SO_4~(2-)/ZrO_2-TiO_2

a novel solid acid of SO42-/ZrO2-TiO2 was prepared and characterized. The effects of reaction conditions on the alkylation of between benzene and 1-dodecene catalyzed by SO42-/ZrO2-TiO2 were studied. The structures of products were characterized by IR spectrum and GC/MS. The results indicated that SO42-/ZrO2-TiO2 mainly consisted of B acid site shows excellent catalytic behaviors. The conversion of 1-dodecene and the selectivity of LAB and 2-LAB are respectively 100%, 90.3% and 88.6% under the optimized reaction conditions, which are 0.12 g catalysts/(mL 1-dodecene), benzene/1-dodecene 6 and reaction time 3 hours. The catalytic activity of used catalyst can be recovered partly by regeneration method of calcinations under 500 ℃ after H2SO4 impregnating. In addition, the characterizations with GC/MS suggest that the products mainly consisted with 2~6-LAB and a few dialkylbenzene.