Spherical active carbon

US7538069B2 · kind B2 · utility

Assignee

• Blucher GmbH · DE

Inventors

• Manfred Schönfeld · Velten, DE
• Raik Schönfeld · Hannover, DE

Key dates

• Filing date: Nov 20, 2003
• Grant date: May 26, 2009
• Expiry date: Apr 13, 2025

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02C20/40
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

The invention relates to spherical active carbon having the following pore size distribution: a) 1.2 1.7 nm: 20-50%, b) 1.7 2.1 nm: 20-50%, c) 2.1 2.5 nm: 10-25%, d) 2.5 2.9 nm: 3-15%, e) 2.9 3.3 nm: 1-10%. The sum of a) to e) is at least 88%. The difference between the sum of a) to e) in relation to 100% corresponds to a proportion of pores having a diameter of <1,2 nm and/or >3,3 nm. The fractal dimension of the open porosity is at least 2.30.