|
FER |
ZSM-35 |
Si(87), Al(13) |
Contributed by Jinxiang Dong
Verified by S. Weigel, by L Schreyeck, and by T. Beelen
Type Material Na5[Al5Si31O72] : wH20 (w ~18)
Method P. A. Jacobs, J. A. Martens [1]
Batch Composition 1.85 Na2O : Al2O3:15.2 SiO2 : 592 H2O:19.7 C2DN a (C2DN ethylenediamine)
Source Materials
distilled water
sodium hydroxide (Merck, reagent grade)
sodium aluminate (Hopkin & Williams, technical grade) b
silica sol (Dupont Ludox AS-30, 30% SiO2)
ethylenediamine (Merck, reagent grade)
Batch Preparation (for 10 g dry product)
(1) [129 g water + 0.7 g sodium hydroxide + 3.3 g sodium aluminate], stir until dissolved
(2) [46.47 g silica sol + 18.3 g C2DN], mix
(3) [(1) + (2)], mix thoroughly
Crystallization
Vessel: stainless steel autoclaves (250 mL)
Temperature: 1770C
Time: 10 days
Agitation: 15 rpm, tumbling [2]
Product Recovery
1) Filter solid products and wash with distilled water
2) Dry at l200C
3) Yield: 60% on SiO2
Product Characterization
XRD: FER (only crystalline phase); Competing phases: quartz, MOR, MFI
Elemental Analysis: SiO2/Al2O3 = 13
Crystal Size and Habit: irregular, approximately 1 um long
Click here to view XRD pattern
References
[1] P. A. Jacobs, J. A. Martens, Stud. Surf. Sci. Catal. 33 (1987) 217
[2] L. Schreyeck, personal communication
[3] C. L Kibby, A. J. Perrota, F. L Massoth, J. Catal. 35 (1974) 256
[4] W. Xu, I. Li , W. Li, H. Zhang, B. Hang, Zeolites 9 (1989) 468
Notes
a. Hydrothermal syntheses using different organic additives are reported in the literature, particularly pyrrolidine [1] and tetramethyl-ammonium cation [3]. Nonaqueous methods based on ethylenediamine plus triethyl-amine give good crystallinity and improved yield. [4]
b. Assumed 1.28 Na/Al, 16% H2O