Synthetic, crystalline aluminosilicate, method for its preparation as well as use

US5385714A · kind A · utility

Assignee

• Vereinigte Aluminum - Werke Aktiengesellschaft · DE

Inventors

• Roland Thome · Bonn, DE
• Arno Tissler · Tegernheim, DE
• Hubertus Schmidt · Pocking, DE
• Gunter Winkhaus · Rübhausen, DE
• Klaus Unger · Seeheim-Jugenheim, DE

Key dates

• Filing date: Jun 29, 1992
• Grant date: Jan 31, 1995
• Expiry date: Jun 29, 2012

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2229/42
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Synthetic crystalline aluminosilicate is prepared by an inorganic process from a reaction mixture, which contains, in an aqueous alkaline medium SiO.sub.2 and Al.sub.2 O.sub.3 or their hydrated derivatives or alkali silicates and aluminates, mineralizers and optionally seeding crystals, the reaction mixture containing: SiO.sub.2 /Al.sub.2 O.sub.3 in molar ratio of 15-40, OH.sup.- /SiO.sub.2 in molar ratio 0.1-0.2, and H.sub.2 O/SiO.sub.2 in molar ratio 20-60. The aluminosilicate produced by the process has a chemical composition expressed in molar ratios as: 0-3 M.sub.2 O:Al.sub.2 O.sub.3 :15-40 SiO.sub.2 :0-40 H.sub.2 O, where M represents an alkali cation. The aluminosilicate is useful in the preparation of catalysts and adsorbents.