Method for the preparation of crystalline and zeolitic aluminosi

Details Method for the preparation of crystalline and zeolitic aluminosi Method for the preparation of crystalline and zeolitic aluminosi

1990-06-11

1992-02-18

Breneman, R. Bruce

Chemistry of inorganic compounds

Silicon or compound thereof

Oxygen containing

423326, C01B 3334

Patent

active

050892436

ABSTRACT:
The present invention relates to a method of preparing crystalline, zeolitic aluminosilicates with SiO.sub.2 /Al.sub.2 O.sub.3 ratios of 20 or more. The method provides a rapid, two-stage crystallization process which avoids the formation of secondary crystalline phases. The first stage is conducted at a temperature between 240.degree. C. and 325.degree. C. for between about 1 and 20 minutes. The second stage is conducted at a temperature between about 120.degree. C. and 225.degree. C. for about 1 to 100 hours.

REFERENCES:
patent: 4687654 (1987-08-01), Taramasso et al.
patent: 4818509 (1989-04-01), Dwyer et al.
Jacobs, et al. Synthesis of High-Silica Aluminosilicate Zeolites, Studies in Surface Science and Catalysis, vol. 33, p. 113, Elsevier Amsterdam (1987).

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