Aluminum-containing substrate comprising a microporous layer of an aluminum phosphate zeolite, method for the production thereof, and use thereof

US9175396B2 · kind B2 · utility

Assignee

• SORTECH AG · DE

Inventors

• Jürgen Bauer · Pocking, DE
• Ralph Herrmann · Bodenwerder, DE
• Wilhelm Schwieger · Spardorf, DE
• Abhijeet Avhale · Amsterdam, NL

Key dates

• Filing date: May 13, 2009
• Grant date: Nov 3, 2015
• Expiry date: Jul 2, 2031

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J2229/66
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

An aluminum-containing substrate is described that comprises at least one superficially applied microporous layer of an aluminum phosphate zeolite (ALPO) as well as other layers. Said aluminum-containing substrate is characterized in that the microporous layer of the aluminum phosphate zeolite represents a primer coating on which a microporous or mesoporous secondary material is located which differs from the material of the primer coating. Said aluminum-containing substrate is produced in a particularly advantageous manner according to a method in which 1. an aluminum-containing substrate is hydrothermally treated in an aqueous suspension containing at least phosphorus as a network-forming element, and a microporous primer coating of an aluminum phosphate zeolite is formed on the substrate by means of an in situ crystallization process, especially the molar ratio between the network-forming aluminum that is deficient in the aqueous suspension and the sum of all network-forming elements in the aqueous suspension being less than 0.5 such that the aluminum required for compensating the deficiency is removed from the aluminum-containing substrate, and 2.; a microporous or mesoporous s…