Activated carbon and process for its production

US4642304A · kind A · utility

Assignee

• Degussa AG · DE

Inventors

• Alfons Karl · Hanau, DE
• Erwin Walter · Hörstein, DE
• Peter Kleinschmit · Hanau, DE
• Hermann Gottschlich · Brilon, DE
• Roland Kutz · Bielefeld, DE
• Detley Koth · Mömbris, DE

Key dates

• Filing date: Mar 28, 1986
• Grant date: Feb 10, 1987
• Expiry date: Mar 28, 2006

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01B32/336
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Activated carbon is produced from lignite coke. It is characterized by the product of the molasses number times the iodine number divided by 1000 being 350 to 1000 and/or the product of the molasses number times the methylene blue number divided by 10 being 500 to 1200. It is produced by adding aqueous alkali or alkaline earth carbonate solution and/or aqueous alkali or alkaline earth hydroxide solution by means of lance during the steam activation of lignite coke in a rotating tube.