Aluminum impregnated silica catalyst for Friedel–Crafts reaction: Influence of ordering mesostructure

Effect of surface silicon modification of H-beta zeolites for alkylation of benzene with 1-dodecene

“…Linear alkylbenzenes (LABs) with long chains (C 10 -C 14 ) produced industrially by the alkylation of benzene with a-olens are the key intermediates for the synthesis of LAS. 2,3 Five isomers of LABs (2-, 3-, 4-, 5-, 6-LAB) can be obtained by the alkylation of benzene with 1-dodecene, via a carbenium ion reaction mechanism in the presence of acidic catalysts, as shown in Fig. 1.…”

“…The molecular size of these ve isomers is less than 0.529 nm, and 2-LAB is the smallest one. 2 He et al reported that the surface activity and biodegradability of LAS are greatly inuenced by the position of the phenyl group in the LAB intermediate used. 2 Among all LAB isomers, the 2phenyl isomer (2-LAB) is the most biodegradable and environmentally favorable.…”

“…2 He et al reported that the surface activity and biodegradability of LAS are greatly inuenced by the position of the phenyl group in the LAB intermediate used. 2 Among all LAB isomers, the 2phenyl isomer (2-LAB) is the most biodegradable and environmentally favorable. 4 Therefore, much research has been devoted to nding a suitable catalyst to attain a high yield of 2-LAB.…”

Catalytic arene alkylation over H-Beta zeolite: Influence of zeolite shape selectivity and reactant nucleophilicity

“…H2SO4, HCl, HNO3) are most frequently used in the synthesis of benzylated arenes, 8 however, they cause sever environmental issues and problems with catalyst separation and regeneration. 9 Environmentally friendly heterogeneous catalysts have been developed to replace homogeneous acids, including zeolites and mesoporous silica-alumina, 7,[10][11][12][13][14][15][16][17][18][19][20][21][22] acidic oxides and sulphides, [23][24][25][26][27][28][29][30] and heteropoly acids (HPAs). 15,31 Zeolites, having crystalline framework, high surface area, regular porous structure, and strong acidity, are the most popular catalysts used in current chemical processes.…”