Ceramic flat membrane and method for producing the same

US6551369B1 · kind B1 · utility

Assignee

• Max-Planck-Gesellschaft zur Föderung der Wissenschaften e.V. · US

Inventors

• Jörg Adler · Meißen, DE
• Reinhard Lenk · Coswig, DE
• Hans J. Richter · Marktoberdorf, DE
• Regina Stockmann · Dresden, DE
• Daniel Tocha · Dresden, DE
• Norbert Stroh · Magstadt, DE
• Stefan Tudyka · Ludwigsburg, DE

Key dates

• Filing date: Dec 3, 2001
• Grant date: Apr 22, 2003
• Expiry date: Dec 3, 2021

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S55/05
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The invention relates to the area of ceramics and to a ceramic flat membrane which is configured as a multi-channel element. The aim of the invention is to provide a ceramic flat membrane with a larger effective membrane surface. To this end, the inventive ceramic flat membrane consists of at least two layers of at least two sub-layers of different porosity, at least one of these layers having a non-planar geometry. The two layers are joined to each other with at least spot joins and integral joins. The invention also provides a method for producing a flat membrane of this type. According to this method, suspensions are produced from at least two ceramic powders of different particle size. Two sub-layers are formed from the suspensions, then dried and joined to form one layer. At least one layer which is embossed and sintered, or unsintered is joined to a non-embossed, similarly embossed, differently embossed or differently structured, sintered or unsintered layer with at least spot joins and integral joins to form a flat membrane.