Process for the production of crystalline aluminosilicates and their use as catalysts and catalyst supports

US4452907A · kind A · utility

Assignee

• The British Petroleum Company Limited · GB

Inventors

• William J. Ball
• David G. Stewart · Epsom, GB

Key dates

• Filing date: Dec 28, 1982
• Grant date: Jun 5, 1984
• Expiry date: Dec 28, 2002

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C2529/06
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Crystalline aluminosilicates having a silica to alumina molar ratio greater than 12 are produced by mixing a source of silica, a source of alumina, a source of alkali metal, water and a source of ammonium ions, e.g. ammonia or an ammonium salt, in the absence of an alcohol or alkylene oxide, in the molar proportions (expressed in the case of the silica and alumina sources in terms of the equivalent moles of the oxide, in the case of the alkali metal source in terms of the equivalent moles of the hydroxide (MOH) and in the case of the source of ammonium ions in terms of free ammonia): PA1 SiO.sub.2 : Al.sub.2 O.sub.3 greater than 12:1 PA1 MOH: Al.sub.2 O.sub.3 in the range from 1:1 to 20:1 PA1 SiO.sub.2 : NH.sub.3 in the range from 1:1 to 200:1 PA1 H.sub.2 O: MOH in the range from 30:1 to 300:1 and maintaining the composition at elevated temperature, such as 120.degree. to 210.degree. C. for a period such that crystallization occurs, typically greater than 4 hours. The crystalline aluminosilicates so-prepared are useful as catalysts and catalyst supports.