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A new starting molar gel composition 1.3K 2 O:Al 2 O 3 :6.0SiO 2 :37H 2 O containing much less silica, potassium and water than a conventional gel composition has been successfully used for the synthesis of zeolite L with minimum chemical waste. Inductively coupled plasma analysis on the mother liquors showed that conversion of 99.7% for Al, 90.9% for Si and...
Sodium ferrate (VI), as a primary source of iron, has been investigated in the hydrothermal synthesis of the zeolite cancrinite. Crystalline material with Fe(III) incorporated into lattice sites was isolated from a starting gel containing 0.5 mole fraction Fe 2 O 3 /Al 2 O 3 . The use of X-ray powder diffraction, infrared spectroscopy, X-ray fluorescence chemical analysis,...
High cobalt-containing CoAPO-34 has been synthesized using tetraethylammonium hydroxide (TEAOH) and [(CH 3 CH 2 ) 4 N] 2 CoCl 4 as a cobalt source and additional templating agent. Pure CoAPO-34 was obtained by replacing up to 0.4 mol fraction of the aluminum by cobalt in the reaction gel at varying template concentrations. The crystallization of CoAPO-34 with...
Highly crystalline MnAPO-20 and CoAPO-20 have been prepared at previously unreported substitution levels using tetrahedral tetrahalometallates. X-ray diffraction and infrared spectroscopy indicate that framework substitution of manganese and cobalt has taken place. Samples have also been studied using X-ray fluorescence, scanning electron microscopy, thermogravimetric analysis, and a Gouy balance...
Potassium ferrate, as a primary source of iron, has been investigated in the hydrothermal synthesis of zeolite LTL. Crystalline material with Fe(III) incorporated into lattice sites was isolated from starting gels containing up to 0.825 mole fraction Fe 2 O 32 O 3 . The use of basic, tetrahedral iron species has extended previous maximum substitution levels. X-ray diffraction,...
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