Kinetic investigation of the effect of Na, K, Li and Ca on the crystallization of titanium silicate ETS-4

被引：16

作者：

Mintova, S

Valtchev, V

Angelova, S

Konstantinov, L

机构：

[1] Central Laboratory of Mineralogy and Crystallography, Bulgarian Academy of Sciences, Sofia

[2] Central Laboratory of Mineralogy and Crystallography, Bulgarian Academy of Sciences, 1000 Sofia

来源：

ZEOLITES | 1997年 / 18卷 / 04期

关键词：

titanium silicate; kinetics; cations;

D O I：

10.1016/S0144-2449(97)00042-0

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Titanium silicate ETS-4 was synthesized in Na, Na-K, Na-Li, and Na-Ca containing gels. The partial replacement of sodium with potassium leads to a change in the kinetics behavior of the crystallization curves, which becomes a function of the content of potassium in the gel. The presence of calcium or lithium in the initial gel increases substantially the nucleation time and the time to attain a maximum degree of crystallinity (Na/Ca = 3.5 and Na/Li = 3.5). The higher concentration of calcium and lithium (Na/Ca = 2.6 and Na/Li = 2.6) leads to the formation of dense calcium- and lithium-containing phases. AII the cations used change strongly the morphology of the grown ETS-4 crystals. (C) Elsevier Science Inc. 1997.

引用

页码：269 / 273

页数：5

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