Crystalline silicates and process for the production thereof

Details Crystalline silicates and process for the production thereof Crystalline silicates and process for the production thereof

1986-12-11

1989-06-06

Doll, John

Chemistry of inorganic compounds

Silicon or compound thereof

Oxygen containing

C01B 3328

Patent

active

048370002

ABSTRACT:
Crystalline silicates and processes for the production thereof are described. These crystalline silicates are of new crystalline structure, which, as determined after calcination in the air at 550.degree. C., have a composition represented by the general formula (I): pM.sub.2
O.Al.sub.2 O.sub.3.qSiO.sub.2 (the symbols are as defined in the appended claims) and give a X-ray diffraction pattern as shown in Table 2. They are superior in heat resistance and acid resistance, and can be used as catalysts for the conversion of various organic compounds, absorbents, or as catalysts for various reactions. They are produced by reacting an aqueous mixture comprising (a) a silica source, (b) an alumina source, (c) an alkali metal and/or alkaline earth metal source, and monoethanolamine at a temperature of 100.degree. to 300.degree. C. until the desired crystalline silicates are formed. Although monoethanolamine does not remain in the crystalline silicates, it plays an important role in the formation of the desired crystalline structure in the course of the production thereof.

REFERENCES:
patent: 4242233 (1980-12-01), Ball et al.
patent: 4346021 (1982-08-01), Ball et al.
patent: 4377502 (1983-03-01), Klotz
patent: 4407728 (1983-10-01), Ball et al.
patent: 4478806 (1984-10-01), Ball et al.
patent: 4578259 (1986-03-01), Morimoto et al.
"Crystallization of High-Silica Zeolite in the Mixture of Water and Organic Solvent", M. Sugimoto et al.

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