Chemistry of inorganic compounds – Zeolite – Organic compound used to form zeolite
Patent
1992-05-13
1993-12-07
Breneman, R. Bruce
Chemistry of inorganic compounds
Zeolite
Organic compound used to form zeolite
423DIG22, C01B 3334
Patent
active
052681629
ABSTRACT:
Finely particulate Zeolites of the ZSM-5 5 family, exhibiting characteristic peaks in an X-ray powder diffraction pattern, are stably produced by a novel method in which a nucleating slurry containing semi-crystalline zeolite having a BET surface area of 100 to less than 250 m.sup.2 /g is mixed with a raw material mixture of silica, alumina and alkali metal sources to obtain a preliminary slurry, followed by heating to obtain a first precursory slurry mixture containing a precursory zeolite having a BET surface area of 100 to 200 m.sup.2 /g, and subsequently the first precursory slurry mixture is mixed with a raw material mixture as mentioned above to obtain a second precursory slurry, followed by heating to obtain a product slurry containing a finely particulate zeolite having a BET surface area of at least 250 m.sup.2 /g. In the method, the first precursory slurry mixture can be advantageously recycled and used as a nucleating slurry. The zeolites are advantageously utilized as catalysts, for example, as a catalyst for hydration of olefins, and also as an adsorbent, a molecular sieve, an agent for soil improvement, a filler for paper and an agent for waste water treatment.
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Ishida Hiroshi
Nakagawa Koji
Asahi Kasei Kogyo Kabushiki Kaisha
Breneman R. Bruce
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