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2260648 
Journal Article 
Hofmeister Anion Effect on the Formation of Zeolite Beta 
Toktarev, AV; Echevskii, GV 
2008 
1 
Studies in surface science and catalysis
ISSN: 0167-2991 
Studies in Surface Science and Catalysis 
174 
167-172 
WOS:000283749900024 
Influence of the anion X nature in tetraethylammonium compound [N(C(2)H(5)) 4] X used as SDA in the non-seeded "SiO(2) - Al(2)O(3) - Na(2)O -[N(C(2)H(5))(4)]X - H(2)O" reacting system on Beta zeolite formation selectivity was investigated. On the base of crystallization product phase composition as a function of synthesis time, the studied series of anions may be arranged in the following sequence: F(-), SO(4)(2-), PO(4)(3-), (CH(2)COO)(2)(2-) > HCOO(-) > (COO)(2)(2-), CH(3)COO(-) >> Cl(-) similar to NO(3)(-) >> Br(-) >> I(-) >> ClO(4)(-) with decreasing zeolite Beta formation potency from left to right. Particularly, F(-), SO(4)(2-), PO(4)(3-) and succinate anions facilitate formation of Beta zeolite in a wide range of the reaction gel chemical composition, while ClO(4)(-), I(-), Br(-) anions prevent the zeolite crystallization. It was experimentally showed that "zeolite-promoting" anions allow to crystallize Beta zeolite in the same wide range of Si/Al composition as it is in TEAOH system, as well as to synthesize the substituted versions of Beta zeolite. The found sequence generally coincides with the well-known Hofmeister series of anions. 
Beta zeolite; synthesis; Hofmeister series