Alkylation of α-methylnaphthalene with long-chain olefins catalyzed by rare earth lanthanum modified HY zeolite

Modified HY zeolites impregnated with an optimum amount of lanthanum was found to be an effective catalyst for the clean alkylation of α-methylnaphthalene with long-chain olefins. It was found that Brönsted acid was the main catalytically active center and that the reaction required an optimal concentration of acidic sites. The deactivated LaHY zeolite catalyst can be regenerated by temperature-programmed calcination.

Graphical abstractAlkylations of α-methylnaphthalene with long-chain alkenes (mixed alkenes, m + n = 7 and 8, mass ratio of C11 to C12 is 45/55) in liquid-phase catalyzed by lanthanum or cerium modified HY zeolite catalysts had been first studied 2% La2O3–HY zeolite was chosen for its excellent catalytic performance. Effects of reaction conditions like reaction temperature, volume hour space velocity (VHSV) and time on stream on the 2% La2O3–HY promoted alkylation were also studied. Figure optionsDownload full-size imageDownload as PowerPoint slide