Process for producing furnace blacks of variable carbon black structure

US4636375A · kind A · utility

Assignee

• Degussa AG · DE

Inventors

• Lothar Rothbuhr · Hürth, DE
• Gerhard Kuhner · Hanau, DE

Key dates

• Filing date: Dec 20, 1982
• Grant date: Jan 13, 1987
• Expiry date: Dec 20, 2002

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01P2006/19
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A process for the production of furnace blacks of variable carbon black structure according to the customary furnace black technology is disclosed, whereby a low ratio is adjusted between combustion air and carbon black raw material for achieving high yields and large raw material through-puts, and wherein for lowering of the carbon black structure the carbon black produced is removed entirely or partly from the exhaust gases and the residual gas thus obtained is completely or partially recycled to the combustion chamber of the reactor.