Process for enlarging the surface of particles

US6076277A · kind A · utility

Assignee

• Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE

Inventors

• Peter Eyerer · Karlsruhe, DE
• Peter Elsner · Remchingen, DE
• Rudolf Emmerich · Bruchsal, DE

Key dates

• Filing date: Mar 16, 1999
• Grant date: Jun 20, 2000
• Expiry date: Mar 16, 2019

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29C2035/0855
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

In order to enlarge the surface of particles which absorb liquids at least o a limited extent, the particles are exposed to a liquid or to a humid atmosphere containing this liquid at least until said liquid has penetrated into the area of the particles close to their surface, and the liquid-containing particles are then irradiated with micro-waves until the penetrated liquid evaporates. The surface of the particles is torn down to the depth of penetration of the liquid and thus enlarged, or the particles break up, creating small broken pieces with an irregular and enlarged surface.