THE EFFECT OF THERMAL-TREATMENT AND OF GRINDING ON SILICALITE-1 SYNTHESIZED IN THE PRESENCE OF FLUORIDE IONS

被引：13

作者：

FONSECA, A

NAGY, JB

ASSWAD, JEA

MOSTOWICZ, R

CREA, F

TESTA, F

机构：

[1] FAC UNIV NOTRE DAME PAIX,CATALYSE LAB,B-5000 NAMUR,BELGIUM

[2] IND CHEM RES INST,PL-01793 WARSAW,POLAND

[3] UNIV CALABRIA,DIPARTIMENTO CHIM,I-87030 RENDE,ITALY

来源：

ZEOLITES | 1995年 / 15卷 / 03期

关键词：

F-MEDIUM; SILICALITE-1; DECOMPOSITION OF TPA; C-13 AND SI-29 NMR; DEFECT GROUPS;

D O I：

10.1016/0144-2449(94)00037-S

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：

Synthesis in fluoride-containing medium leads to large silicalite crystals without SiOX defect groups. The four occluded tetrapropylammonium (TPA(+)) ions/unit cell are ion pairs with 2 F- and 2 OH-. Grinding the samples in the presence of water leads to SiOH groups that are eliminated during calcination. The two endothermic peaks at 420 and 560 degrees C of the TPA(+) decomposition are identified as being due to the Hoffmann degradation of the TPA(+) ion (first peak) and to the decomposition of the products of TPA(+) ion (second peak).

引用

页码：259 / 263

页数：5

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