Production of a zeolite-containing solid

US6967181B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Ulrich Müller · Neustadt, DE
• Hartwig Voss · Bischofswerda, DE
• Erich Schubert · Bad Dürkheim, DE
• Friedrich Hill · Meckenheim, DE
• Hermann Petersen · Burghausen, DE

Key dates

• Filing date: Nov 22, 2002
• Grant date: Nov 22, 2005
• Expiry date: Nov 22, 2022

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01J29/06
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

In a process for concentrating an at least partially crystalline solid containing at least one zeolite in a mixture comprising at least one auxiliary, for example a template compound, and said solid, the mixture is ultrafiltrated in a step (II) to divide the mixture into a retentate and a permeate, the solids content in the retentate being higher than that in the mixture and the solids content in the permeate being lower than that in the mixture. This procedure allows auxiliaries, in particular template compounds, present in the permeate to be recycled into a crystallizing step (I) upstream of step (II).