Process for manufacturing highly porous mineralic bodies of polymorphic structure

US4680153A · kind A · utility

Assignee

• Institut for Energetik - Zentralstelle fur Rationelle Energieanwendung · DE

Inventors

• Reiner Kinder · Leipzig, DE
• Johannes Teubel · Freiberg, DE
• Herbert Schuster · Grafing, DE
• Christine Fanslau · Leipzig, DE

Key dates

• Filing date: May 29, 1984
• Grant date: Jul 14, 1987
• Expiry date: May 29, 2004

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S264/49
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

In order to produce mineralic bodies of high porosity, usable inter alia as adsorbers, purifiers and catalyst carriers, a predominantly mineralic mass with organic admixtures--both preferably obtained from industrial waste products--are subjected to a three-phase treatment. In a first phase, the mass is heated in an inert or reducing atmosphere to a sintering temperature between about 1000.degree. C. and 1350.degree. C. whereby the organic constituents are carbonized and partly penetrate the consolidating mineralic structure. In a second phase, still under the same nonoxidizing atmosphere and at the sintering temperature referred to, the mineralic structure is sintered into a coherent matrix. In a third phase, with reduction of the temperature to a lower level between about 600.degree. and 1000.degree. C. and exposure to the atmosphere, the carbonaceous substances occluded in the mineralic skeleton are burned off to increase its porosity.