Alkylation of ?-Methylnaphthalene with Long-Chain Olefins over Large-Pore Zeolites

Abstract

The liquid-phase alkylation of a-methylnaphthalene with long-chain olefins (C 11ÀÀ12 ) has been investigated firstly in the presence of H-Y and H-Beta zeolites with different pore architectures. The H-Y zeolites exhibited outstanding catalytic performances. The influences of various reaction parameters like temperature, pressure, mole ratio of a-methylnaphthalene to olefins (n rea ), solvent concentration, volume hour space velocity (VHSV) and time on stream on the reaction were studied in detail. Under the optimal reaction parameters, more than 90% conversion of olefins and 100% selectivity for the desired mono-alkyl methylnaphthalene were achieved.

HY zeolite promoted free-solvent alkylation of α-methylnaphthalene with long chain olefins in liquid–solid intermittent reaction

“…It is a complex process consisting of various side reactions, besides the main reaction, alkylation. The reaction products were characterized by GC/MS [18,20]. The results exhibit that, except for the desired products, a series of isomers of monoalkylated methylnaphthalene.…”

“…Results showed that HY zeolite catalyst exhibited good catalytic performances [18,19]. Towards large-scale production, continuous reaction operating mode is good.…”

An efficient method for the alkylation of α-methylnaphthalene with various alkylating agents using methanesulfonic acid as novel catalysts and solvents

“…The alkylations of aromatic hydrocarbon with longchain olefins, alkyl halide and aliphatic alcohol, are typical Friedel-Crafts reaction, and may be catalyzed conventionally by homogeneous acid catalysts, such as H 2 SO 4 , BF 3 , HF, AlCl 3 , FeCl 3 , etc., which give rise to many problems concerning the handing, health, safety, corrosion and waste disposal of the catalysts [9]. In order to overcome these problems, many efforts have been devoted to the search of various heterogeneous acid catalysts to replace the homogeneous acid catalysts, including zeolite [10,11], heteropoly acid [9,12] and ionic liquids [13][14][15][16] etc.…”

“…In order to overcome these problems, many efforts have been devoted to the search of various heterogeneous acid catalysts to replace the homogeneous acid catalysts, including zeolite [10,11], heteropoly acid [9,12] and ionic liquids [13][14][15][16] etc. However, there exist some shortages towards the above catalysis technology.…”

The metal ion modified ionic liquids promoted free-solvent alkylations of α-methylnaphthalene with long-chain olefins

“…To date, alkylations of benzene have already been widely and thoroughly investigated [3][4][5], but not for naphthalene and its derivatives. In our laboratory, some preliminary studies on long-chain alkylations of methylnaphthalene catalyzed by both traditional catalysts [6][7][8][9], novel alkyl-containing amine bromochloroaluminate ionic liquid catalysts [10][11][12] and zeolite catalysts [13] have been done. The alkylation of ␣-methylnaphthalene with long-chain olefins is believed to be a typical Friedel-Crafts reaction, and has conventionally been catalyzed by homogeneous acid catalysts, such as anhydrous AlCl 3 , concentrated H 2 SO 4 , HF, BF 3 , etc., which give rise to many problems concerning the handing, health, safety, corrosion, and waste disposal of catalysts.…”