Chemistry of inorganic compounds – Silicon or compound thereof – Oxygen containing
Patent
1984-12-26
1987-03-17
Doll, John
Chemistry of inorganic compounds
Silicon or compound thereof
Oxygen containing
423118, 423329, 423330, 502 60, 502 77, C01B 3328
Patent
active
046506543
ABSTRACT:
A ferrierite type zeolite having a high purity and a high SiO.sub.2 /Al.sub.2 O.sub.3 molar ratio is prepared by reacting simultaneously and continuously an aqueous sodium and/or potassium silicate solution with an aluminum-containing solution to obtain a homogeneous phase compound of a granular amorphous aluminosilicate containing Al in an amount of 3 to 14 wt. % as calculated as anhydrous Al.sub.2 O.sub.3 and Na and/or K in an amount of 1 to 17 wt. % as calculated as anhydrous Na.sub.2 O and/or K.sub.2 O; and then, crystallizing the homogeneous phase compound in the form of a slurry in water or in an aqueous sodium hydroxide and/or potassium hydroxide solution. The molar ratio of K.sup.+ to the total of (K.sup.+ +Na.sup.+) in the slurry is 0.1 to 0.9.
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Kibby et al, "Journal of Catalyst", 35, 1974, pp. 256-277.
Arika Junji
Igawa Kazushige
Itabashi Keiji
Miyazaki Hiroshi
Doll John
Leeds Jackson
Toyo Soda Manufacturing Co. Ltd.
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